Labconco 7584000 User Manual

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Technology for Vacuum Systems

Instructions for use

RC 6

Chemistry-HYBRID-pump

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Dear customer,

Your VACUUBRAND pumps are designed to provide you with many years
of trouble-free service with optimal performance. Through our long expe­rience in design, construction and operation of vacuum pumps, combined
with the latest developments in material and manufacturing technology,
we have accumulated a wealth of application and safety insights that we
want to share with you.
Please read these instructions for use before the initial operation of your
pump.

Our quality maxim is the ”zero fault principle”:
Every pump, before leaving our factory, is tested intensively, including an
endurance run of 60 hours. Any faults, even those which occur rarely, are

identied and can be eliminated immediately.

After completion of the endurance run, every pump is tested, and must

achieve specications before shipment.

We are committed to providing our customers only pumps that meet this
high quality standard.
While our pumps cannot eliminate all of your work, we design, manufac­ture and test them to ensure that they will be an effective and trouble-free
tool to assist you in that work.

Yours,
VACUUBRAND GMBH + CO KG

After sales service:
Contact your local dealer or call [phone].

Trademark index:

VACUU•LAN

®

(US-Reg.No 3,704,401), VACUU•BUS®, VACUU•CONTROLTM,

chemistry-HYBRIDTM, Peltronic®, TURBO•MODETM, VARIO® (US-Reg.No
3,833,788), VARIO-SPTM, VACUUBRAND® (US-Reg.No 3,733,388) and also
the shown company logos are trademarks of VACUUBRAND GMBH +
CO KG in Germany and/or other countries.

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Contents

Safety information! ............................................................. 4

Important information! ......................................................................... 4

General information ............................................................................. 6

Intended use........................................................................................ 6

Setting up and installing the equipment .............................................. 7

Ambient conditions ............................................................................ 10

Operating conditions ..........................................................................11

Safety during operation ..................................................................... 12

Maintenance and repair..................................................................... 15

Technical data ................................................................... 18

Gas inlet temperatures ..................................................................... 19

Wetted parts ..................................................................................... 20

Abbreviations .................................................................................... 20

Pump parts ....................................................................................... 20

Use and operation ............................................................ 22

Installing a pump in a vacuum system .............................................. 22

During operation ................................................................................ 25

Important notes regarding the use of gas ballast .............................. 28

Operating the pump with condensate in the catchpots ..................... 29

Pumping chemically aggressive or toxic gases and vapors .............. 30

Shutdown .......................................................................................... 31

Oil change ......................................................................... 32

Oil change procedure ........................................................................ 33

Notes on choosing the appropriate oil for the application ................. 34

Accessories ...................................................................... 36

Troubleshooting ............................................................... 38

Replacing diaphragms and valves.................................. 41

Cleaning and inspecting the diaphragm pump heads ...................... 43

Replacing the diaphragm ................................................................. 45

Assembling the pump heads ............................................................ 47

Assembling the connecting hose ...................................................... 48

Checking the operability of the diaphragm pump ............................. 48

Replacing the lter element in the oil mist lter ................................ 49

Inspecting the safety pop valve ........................................................ 49

Notes on return to the factory ......................................... 50

Warranty ............................................................................ 53

Health and safety clearance form ................................... 54

EC Declaration of Conformity of the Machinery ............... 55

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Safety information!

Important information!

+ Keep this manual complete and accessible to per-

sonnel at all times!

+ Read this manual carefully before installing or op-

erating the equipment. Observe the instructions
contained in this manual.

+ Do not modify the equipment without authorization.

NOTICE

This manual is an integral part of the equipment de­scribed therein. It describes the safe and proper use
of the vacuum pump.
Make operating personnel aware of dangers arising
from the pump and the pumped substances.
VACUUBRAND disclaims any liability for inappropri­ate use of these pumps and for damage from failure
to follow instructions contained in this manual.

This manual is only to be used and distributed in its com­plete and original form. It is strictly the users’ responsibility
to check carefully the validity of this manual with respect
to his product.
Manual-no.: 997829 / 09/18/2012

The following signal word panels and safety
symbols are used throughout this manual:

This is the safety alert symbol. It is used to alert you to po­tential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury and death.

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➨ DANGER indicates a hazardous situation which, if not

avoided, will result in death or serious injury.

+ WARNING indicates a hazardous situation which, if not

avoided, could result in death or serious injury.

• CAUTION indicates a hazardous situation which, if not

avoided, could result in minor or moderate injury.

NOTICE

NOTICE is used to address practices not related to per-

sonal injury.

Caution! Hot surface!

Disconnect equipment from AC power.

Formatting used in this manual:
Note: The signal word panels in all sections of this manual always refer

to all paragraphs of the same format (➨ / + / • / plain text) following each
signal word panel.

The document ”Safety information for vacuum equipment” is
part of this manual! Read the ”Safety information for vacuum

equipment” and observe the instructions contained therein!

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General information

NOTICE

Remove all packing material from the packing box. Re­move the product from its packing-box and retain all pack­aging until the equipment is inspected and tested. Re­move the protective caps from the inlet and outlet ports
and retain for future use. Inspect the equipment promptly
and carefully.
If the equipment is damaged, notify the supplier and the
carrier in writing within three days. Retain all packing ma­terial for inspection. State the item number of the product
together with the order number and the supplier’s invoice
number. Failure to check and give notice of damage will

void any and all warranty claims for those deciencies.

Replace the protective caps, if the equipment is not used
immediately. Store the equipment in dry and non-corrosive
conditions (see also “Technical data”, pg. 18).

+ Do not use any damaged equipment.

• Check the pump‘s oil level.

• The pump is delivered without oil lling. Fill with oil

before operating the pump, see section “Oil change”,
pg. 32.

• Aging of the oil (as indicated by darker color compared

to new oil, strange odor of the oil, particles in the oil, or
contamination) necessitates an oil change.

• Use the handle when moving the pump.

Intended use

+ Do not use the pump or any system parts on humans

or animals.

+ Prevent any part of the human body from coming into

contact with vacuum.

+ Ensure that the individual components are only con-

nected, combined and operated according to their de-

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sign and as indicated in the instructions for use.

+ Comply with all notes on correct vacuum and electri-

cal connections; see section “Use and operation”, pg.

22.

+ Do not use the pump to generate pressure.

+ The pumps are designed for ambient temperatures

during operation between +54°F and +104°F (+12°C
and +40°C). Periodically check maximum tempera­tures if installing the pump in a cabinet or a housing.
Make sure ventilation is adequate to maintain recom­mended operating temperature. Install an external au­tomatic ventilation system if necessary. If pumping hot

NOTICE

process gases, make sure that the maximum permitted
gas inlet temperature is not exceeded. The maximum
permitted gas inlet temperature depends on several
parameters like inlet pressure and ambient tempera­ture (see “Technical data”, pg. 18).

+ Do not aspirate particles and dust.
+ Do not pump liquids.

• Ensure that the pump is chemically resistant to the

pumped substances prior to operation.

Use the equipment only as intended, that is, for genera­tion of vacuum in vessels designed for that purpose. Any
other use will automatically invalidate all warranty and li­ability claims. Remain aware of safety and risks.

Setting up and installing the equipment

➨ Equipment must be connected only to a suitable elec-

trical supply and a suitable ground point. As such,

the plug must be plugged into an outlet that is properly
grounded. Failure to connect the motor to ground may
result in deadly electrical shock.

The supply cable may be tted with a molded Euro-

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pean IEC plug or a plug suitable for your local electrical
supply. The cable contains wires color coded as fol­lows: green or green and yellow: ground; blue or white:
neutral; brown or black: hot.

+ Due to the high compression ratio, the pump may gen-

erate overpressure at the outlet. Check pressure com­patibility with system components (e.g., exhaust pipe­line or exhaust valve) at the outlet.

+ Do not permit any uncontrolled pressurizing. Make

sure that the exhaust tubing cannot become blocked. If
there is an exhaust isolation valve, make sure that you
cannot operate the equipment with the valve closed to
avoid a risk of bursting!

+ Always provide a free and pressureless exhaust outlet

to avoid damage to the pump and a risk of bursting.

+ Keep the electrical power cord away from heated sur-

faces.

• Provide a rm, level platform for the equipment. Check

that the system which you are going to evacuate is

mechanically stable. Check that all ttings are secure.

Ensure a stable position of the pump without any me­chanical contact other than the pump feet.

• Comply with maximum permissible pressures at in-
let and outlet and with maximum permissible pres-
sure differences between inlet and outlet. See section
“Technical data”, pg. 18. Do not operate the pump
with overpressure at the inlet.

• Avoid overpressure of more than 17.5 psi absolute (1.2

bar absolute) in the event that gas or inert gas is con­nected to the pump, to the gas ballast or to a venting
valve.

• Note: Flexible elements will shrink when evacuated.

• Connect hoses gas tight at inlet and outlet of the pump.

• Ensure that no foreign objects can be drawn into the

pump.

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• Check the power source and the pump’s rating plate

to be sure that the power source and the equipment
match in voltage, phase, and frequency.

• Use only oil of the recommended type. Other oils or op­erating uids may cause damage of the pump or dan-

ger.

Use special oils (see “Oil change”, pg. 32) for the

rotary vane pump, if, e.g.,

- acid vapors are pumped.

- extremely high aging stability is required.

- oxygen or other strong oxidizing agents are pumped.

NOTICE

• Take adequate precautions when handling pump uids,

lubricants, and solvents. Use appropriate protective
clothing, safety goggles and protective gloves to avoid
excessive contact with the skin and possible skin irrita­tions (including dermatitis). Do not inhale or swallow!
Ensure that the pump location is well ventilated and
that possible toxic effects of certain vapors are avoided.
Maintain adequate levels of hygiene and cleanliness.

• Comply with all relevant statutory requirements and

regulations concerning the handling, storage and dis­posal of oil.

Note: Do not allow oils to enter the drainage system

or other bodies of water. Spillage can cause accidents
(slip hazard)!

Keep a minimum distance of 8 in (20 cm) between the
cooling fan and surrounding items (e.g., housing, walls,
etc.). Check fan regularly for dust/dirt. Clean fan guard if
necessary to avoid a reduction of ventilation.

The On/Off switch is located at the side of the terminal
box.

Use only hoses at the inlet and outlet of the pump with
an inner diameter at least as large as the diameter of the
pump’s connections (to avoid overpressure at the outlet,

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and reduction of pumping speed at the inlet).

Allow the equipment to equilibrate to ambient temperature
if you bring it from cold environment into a room prior to
operation. Notice if there is water condensation on cold
surfaces.

Comply with all applicable and relevant safety require-

ments (regulations and guidelines). Implement the re­quired actions and adopt suitable safety measures.

Ambient conditions

➨ Do not reach for this product if it has fallen into liquid.

There is a risk of deadly electrical shock. Unplug the
system immediately.

+ Do not use this product in an area where it can fall or

be pulled into water or other liquids.

+ Pay attention to the permissible maximum ambient

and gas inlet temperatures (see”Technical data”, pg.

18).

• Adopt suitable measures in case of differences from

recommended conditions, e.g., using the equipment
outdoors, installation in altitudes of more than 6500 ft
(2000 m) above mean sea level, conductive pollution or
external condensation on the pump.

NOTICE

• Do not operate this product near ames.

To the best of our knowledge the equipment is in com­pliance with the requirements of the applicable EC-direc­tives and harmonized standards (see ”Declaration of Con­formity”) with regard to design, type and model. Directive
EN 61010-1 gives in detail the conditions under which the
equipment can be operated safely (see also IP degree of
protection, “Technical data”, pg. 18).

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Operating conditions

➨ These pumps are not approved for operation in po-

tentially explosive atmospheres. Do not operate the

pumps in potentially explosive atmospheres.

➨ These pumps are not approved for the pumping of po-

tentially explosive atmospheres. Do not pump poten-

tially explosive atmospheres.

➨ The pumps are not suitable to pump any of the sub-

stances listed below.

Do not pump:

- unstable substances

- substances which react explosively under impact

(mechanical stress) without air

- substances which react explosively when being ex-

posed to elevated temperatures without air,

- self inammable substances,

- substances which are inammable without air

- explosive substances.

➨ The pumps are not approved for operation below

ground. Do not operate the pump below ground.

+ The pumps are not suitable for pumping dust.
Do not pump dust.

• Do not pump substances which may form deposits in-
side the pump. The pumps are not suitable for pumping
substances which may form deposits inside the pump.
Deposits and condensate in the pump may lead to in­creased temperatures even to the point of exceeding
the maximum permitted temperatures. Deposits may
cause seizing of the pump unit.

• Check the inlet and outlet of the pump and its oil condi­tion, if there is a danger of forming deposits inside the
pump, e.g., in the pump unit of the rotary vane pump or
in the pump chamber of the diaphragm pump. Inspect
the pump regularly and clean if necessary.

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• Install a cold trap in front of the pump if pumping ag­gressive or corrosive gases or vapors.

• Consider interactions and chemical reactions of
the pumped media. Ensure that the materials of the

pump’s wetted parts are compatible with the pumped
substances, see section “Technical data”, pg. 18.

When changing the substances pumped, we recom-

mend purging the pump with air or inert gas prior to
changing the pumped media. Purging the pump will
pump out residues and it will reduce the possibility of
reactions of the pumped substances with each other
and with the pump’s materials.

Safety during operation

➨ Adopt suitable measures to prevent the release of dan-

gerous, toxic, explosive, corrosive, noxious or polluting

uids, vapors and gases. To prevent any emission of

such substances from the pump outlet, install an ap­propriate collecting and disposal system and take pro­tective action for pump and environment.

➨ You must take suitable precautions to prevent any for-

mation of explosive mixtures in the expansion cham­ber, in the oil reservoir, in the pump chamber of the dia­phragm pump, or at the outlet of the pump. In case, e.g.,
of a diaphragm failure, mechanically generated sparks,
hot surfaces or static electricity may ignite these mix­tures. Use inert gas for gas ballast or venting, if neces­sary.

➨ Drain appropriately or otherwise remove any potential-

ly explosive mixtures at the outlet of the pump, or dilute
them with inert gas to non-explosive concentrations.

➨ Never operate this pump if it has a damaged cord or

plug.

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+ If the pump is not working properly, has been dropped

or has fallen into water, contact your pump service pro­vider.

+ Prevent any part of the human body from coming into

contact with vacuum.

+ Never aspirate liquids or dust into the pump.
+ Make sure that the exhaust tubing cannot become

blocked. Do not exceed an pressure of 16 psi (1.1 bar)
in the exhaust tubing.

+ Comply with applicable regulations when disposing of

chemicals. Take into consideration that chemicals may
be contaminated. Take adequate precautions to pro­tect people from the effects of dangerous substances
(chemicals, oil mist, thermal decomposition products of

uoroelastomers). Use appropriate protective clothing

and safety goggles.

+ Even if the pumped medium is only air or a pure gas,

the discharge from rotary vane pumps will contain small
quantities of oil vapor and petroleum fractions. These
substances are particularly contaminating in closed

spaces or in case of insufcient ventilation.

The discharge from the pump invariably contains the

pumped gases or vapors! Connect a hose to the pump
outlet to dispose of the exhaust gases.

Prevent any dangerous reactions with oil or oil vapors

and the formation of impermissible or dangerous emis­sions.

+ Use only original manufacturer’s spare parts and

accessories. Otherwise the safety and performance of

the equipment, as well as the electromagnetic compat­ibility of the equipment might be reduced.

The CE mark may be voided if not using original manu-

facturer’s spare parts.

+ Failure of the pump (e.g., due to power interruption),

failure of connected components or of parts of the sup­ply, or a change of parameters must not be allowed to

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lead to a dangerous situation under any circumstances.
In case of a leak in the manifold or at the shaft seal of
the rotary vane pump, or in case of a diaphragm crack
of the diaphragm pump, pumped substances might be
released into the environment or into the pump housing
or motor.

Especially comply with notes on use and operation and

maintenance.

+ The residual leak rate of the equipment might render

possible an exchange of gas, albeit extremely slight,
between the environment and the vacuum system.

Adopt suitable measures to prevent contamination of

the pumped substances or the environment.

• Ensure that no parts of your clothing, hair or ngers

can be caught or drawn in at the inlet of the pump. Nev-

er insert ngers or drop any other object into the inlet or

outlet.

• Pumping at high inlet pressure may lead to overpres­sure at the gas ballast valve. Pumped gases or con­densate might be expelled if the valve is open. If an
inert gas supply is connected to the gas ballast, ensure
that its inlet pipeline is not contaminated.

• Check oil level of the rotary vane pump (through sight

glass) every time before starting the pump.

• Check the pump’s oil level and the condition of the oil

on a regular basis.

• Pay attention to the safety symbol ”hot surfaces” on
the equipment. Hot parts may cause burns if touched.
Adopt suitable measures to prevent any danger arising
from hot surfaces or electric sparks. Ensure that hot
surfaces of the pump do not cause burns. Provide a
suitable contact guard if necessary.

• A power failure or switching off the pump may cause

accidental ventilation of the pump or the vacuum sys-

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tem, if the manual gas ballast valve of the rotary vane
pump is open. If this constitutes a potential source of
danger, take appropriate safety measures, e.g., install
a solenoid operated gas ballast valve.

NOTICE

Do not start the pump if the pressure difference between
inlet and outlet exceeds 16 psi (1.1 bar) at maximum.

Prevent the backpressure of gases and the backow of

condensates at the outlet.

Important notes on working with condensable vapors:
Allow the pump to attain its operating temperature before
pumping condensable vapors. Keep the vapor inlet pres­sure below the permitted maximum (see ”Technical data”,
pg. 18).

Open the gas ballast valve in case of pumping signicant

amounts of vapor.
Provide appropriate protective measures to allow for the
possibility of failure and malfunction. The protective mea­sures must also allow for the requirements of the respec­tive application.

In case of overload, the motor is shut down by a self-hold

thermal cutout in the winding.
Note: Only manual reset is possible. Switch off the pump

and disconnect from the power source. Identify and elimi-

nate the cause of failure. Wait approx. ve minutes before

restarting the pump.

Avoid high heat supply (e.g., due to hot process gases).
See “Technical data”, pg. 18, for maximum permitted
gas and ambient temperatures.

Maintenance and repair

NOTICE

In order to comply with laws (occupational, health and
safety regulations, safety at work law and regulations for

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environmental protection) vacuum pumps, components
and measuring instruments can only be returned when
certain procedures (see section “Notes on return to the
factory”, pg. 50) are followed.

Take advantage of our service seminars, which put special
focus on the maintenance and repair of vacuum pumps.
For details and for the online ”Instructions for repair” man­ual see www.vacuubrand.com.

Under conditions of normal wear, the lifetime of the dia­phragms and valves is > 10000 operating hours. Bearings
have a typical durability of 40000 h. Motor capacitors have a
typical durability in the range of 10000 to 40000 h depending
strongly on operation conditions, including ambient tempera­ture, humidity or load.

➨ Ensure that the pump cannot be operated acciden-

tally. Never operate the pump if covers or other
parts of the pump are disassembled.

➨ Switch off the pump. Disconnect the electrical pow-

er cord and wait two minutes before starting mainte-

nance to allow the capacitors to discharge.

➨ Note: The pump may be contaminated with process

chemicals, which have been pumped during operation.
Ensure that the pump is completely decontaminated
before maintenance commences. Avoid the release of
pollutants.

+ Take adequate precautions to protect people from the

effects (e.g., in case of inhalation or skin contact) of
dangerous substances if contamination has occurred.
Use appropriate protective clothing, safety goggles and
protective gloves.

+ Wear parts have to be replaced regularly.
+ Never operate a defective or damaged pump.

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+ Check every motor capacitor regularly by measuring

its capacity and estimating its time in operation. Re­place old capacitors early enough to prevent a failure in
operation. If an old motor capacitor fails, the capacitor

may get hot. It may even melt or emit a ame, which

could be dangerous for persons and equipment in
the vicinity. The capacitors have to be replaced by an

electrician.

+ Vent the pump before starting maintenance. Isolate the

pump and other components from the vacuum system.

Allow sufcient cooling of the pump. Drain condensate,

if applicable.

NOTICE

Ensure that maintenance is done only by suitably trained
and supervised technicians. Ensure that the maintenance
technician is familiar with the safety procedures which re­late to the products processed by the pumping system.

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Technical data

Type RC 6

Maximum pumping speed
50/60 Hz (ISO 21360)

Ultimate partial pressure
without gas ballast

a.)

Ultimate total pressure
without gas ballast

b.)

Ultimate total pressure
with gas ballast

Water vapor tolerance

c.)

Oil capacity min./max.

Total pressure in oil reservoir

Oil temperature

e.)

(under typical

operating conditions)

d.)

cfm

(m3/h)

Torr

(mbar)

Torr

(mbar)

Torr

(mbar)

Torr

(mbar)

quarts

(ml)

Torr

(mbar)

°F

(°C)

3.5 / 4.1

(5.9 / 6.9)

-4

3*10

(4*10-4)

1.5*10

-3

(2*10-3)

0.75*10

-2

(1*10-2)

>>30

(>>40)

0.36 / 0.56

(340 / 530)

13.5
(18)

140

(60)

Recommended oil VACUUBRAND B-oil

Maximum permissible inlet / outlet
pressure (absolute)

Maximum permissible pressure
difference between inlet and outlet

Maximum permissible pressure
(absolute) at gas ballast valve

Permissible ambient temperature
storage / operation

psi

(bar)

psi

(bar)

psi

(bar)

°F

(°C)

16

(1.1)

16

(1.1)

17.5

(1.2)

14 to 140 / 54 to 104

(-10 to +60 / +12 to +40)

Permissible relative atmospheric
moisture during operation

% 30 to 85

(no condensation)

Rated motor power

hp

(kW)

0.5

(0.37)

No-load speed 50/60 Hz rpm 1500 / 1800

Maximum permissible range of
supply voltage

Attention: Observe specications

100-120 V~ +5%/-10% 50/60 Hz

230 V~ ±10% 50/60 Hz

of rating plate!

Motor protection

self-hold thermal cutout,

manual reset

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Type RC 6

Rated current during operation
100-120 V~ 50/60 Hz
230 V~ 50/60 Hz

f.)

at:

A
A

5.7 / 5.1

2.7 / 2.6

Degree of protection IEC 529 IP 40

A-weighted emission sound
pressure level
(uncertainty K

g.)

: 3 dB(A))

pA

dB(A) 50

Inlet small ange KF DN 16

Outlet

Dimensions L x W x H approx.

Weight with oil lling approx.

a.) Partial pressure of permanent gases measured at pump inlet.
b.) The total pressure is higher than the partial pressure because the former includes the vapor

pressure of the pump oil and other condensable vapors (e.g., water); the condition of the oil
(cleanliness, content of hydrocarbons with higher partial pressures) is crucial for this value.

c.) The maximum inlet pressure for water vapor, or rather the maximum inlet pressure for vapor,

cannot be specied in accordance with ISO 21360-2 because it cannot be determined for the

HYBRID pump in accordance with this standard. Because the diaphragm pump reduces the
pressure in the oil-sealed part of the RC 6, however, the water vapor tolerance is considerably

higher than that of a conventional oil-sealed rotary-vane pump.
d.) With inlet sealed and without gas ballast.
e.) Oil temperature and pressure in the oil reservoir are the relevant parameters for maximum

vapor inlet pressure and chemical resistance.

f.) During the start-up period of the pump (rst 6 minutes after switching-on), the current draw

may be elevated to twice the nominal current draw during normal running conditions.
g.) Measurement according to EN ISO 2151:2004 and EN ISO 3744:1995 at 230V/50Hz and

ultimate vacuum with exhaust tube at outlet.

(mm)

lbs.

(kg)

hose nozzle for tubing I.D. 3/8”

(hose nozzle DN 10 mm)

in

20.1 x 12.0 x 9.1

(510 x 305 x 230)

53.4

(24.2)

Gas inlet temperatures

Operating condition Inlet pressure

Continuous operation

Continuous operation

Short-time
(< 5 minutes)

> 75 Torr (100 mbar)
(high gas load)

< 75 Torr (100 mbar)
(low gas load)

< 75 Torr (100 mbar)
(low gas load)

We reserve the right for technical modication without prior notice!

Permitted range of gas
temperatures at inlet

➨ 50 °F to 104 °F
(+10°C to +40°C)

➨ 32 °F to 140 °F
(0°C to +60°C)

➨ 14 °F to 176 °F
(-10°C to +80°C)

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Wetted parts

Components Wetted materials

Metal parts

Plastic materials

aluminum alloy, stainless steel, grey cast iron, steel
(partly plasma nitrated), nickel-plated, zinc-plated

epoxy resin, FFKM, FPM, NBR, PBT, PEEK, PFA,

PPS glass-ber reinforced, PTFE, PVC

The pump RC 6 doesn’t contain any nonferrous heavy metal.

Abbreviations

FFKM: Peruoro elastomer
FPM: Fluoroelastomer
NBR: Nitrile butadiene rubber
PBT: Polybutylene terephthalate
PEEK: Polyether ether ketone
PFA: Peruoroalkoxy
PPS: Polyphenylene sulde
PTFE: Polytetrauoroethylene
PVC: Polyvinyl chloride

Pump parts

Position Component

1 Inlet

2 Outlet

3 Manual gas ballast valve

4 ON/OFF switch

5 Power connection

6 Handle

7 Rating plate with min. / max. mark for oil level

8 Oil inlet

9 Oil outlet

10 Sight glass for oil level

11 Manometer for oil reservoir pressure control

12 Oil mist lter

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RC 6

12

10

11

1

6

5

8

7

3

4

9

2

We reserve the right for technical modication without prior notice!

page 22 of 56

Use and operation

Method of operation:

The RC 6 is a four-stage vacuum pump consisting of an oil-sealed, two­stage rotary vane pump with a series-connected two-stage diaphragm
pump. The two units are mounted on a common shaft and are connected
directly to the drive motor. The dry-running compressor-type diaphragm
pump evacuates the headspace of the oil reservoir of the rotary vane
pump, thus considerably increasing the latter’s maximum vapor inlet
pressure and chemical resistance.

With the gas ballast valve closed, the rotary vane pump shuts off vacuum
tight. This, in turn, prolongs the intervals between oil changes and im­proves corrosion resistance. The oil system incorporates an oil pump;
this forced-lubrication system ensures an adequate supply of oil to the
pump unit even at high inlet pressures. A mechanical retaining valve in
the oil system prevents oil suck-back into the vacuum system.

The oil mist lter of the rotary vane pump removes 99 % of the oil mist. If
an exhaust waste vapor condenser is tted (available on request), the va-

pors handled by the pump can be condensed to a large extent and either
be recycled or disposed of in accordance with regulations.

Installing a pump in a vacuum system

➨ If dangerous or polluting uids, oil mist, or toxic or nox-

ious gases could be released at the outlet, install an
appropriate system (e.g., oil mist separator, see “Ac­cessories”, pg. 36) to catch and dispose of those u­ids or gases.

+ Connect a gas-tight exhaust line at the pump outlet if

necessary. Always vent exhaust gases appropriately
(e.g., into a fume hood). If needed, install an exhaust
waste vapor condenser (see ”Accessories”, pg. 36).

+ Never block the gas outlet. The exhaust line must al-

page 23 of 56

ways be free of obstructions (no back pressure) to en­sure an unimpeded discharge of gas. The cross-sec­tion of the outlet tubing must be at least the size of the
pump’s exhaust connection.

+ Failure to connect the inlet and outlet lines correctly

will cause overpressure and risk of bursting! The outlet
(hose nozzle) is marked ”EX”.

+ Particles and dust must not be aspirated. If necessary,

you must install appropriate lters. You must ensure
their suitability concerning gas ow, chemical resis-

tance and resistance to clogging prior to use.

+ Make sure ventilation is adequate, especially if the pump

is installed in an enclosure, or if the ambient temperature
is elevated. Provide external ventilation, if necessary.

• Reduce the transmission of vibration. Prevent mechan­ical load due to rigid pipelines. Insert elastic hoses or

exible elements as couplings between the pump and

rigid pipes.

Note: Flexible elements will compress or atten when

evacuated if not designed for use under vacuum.

• Hose connections at the pump inlet must always be

gas tight.

• Install a cold trap in front of the pump, if pumping ag­gressive or corrosive gases or vapors.

• A power failure may cause accidental ventilation of the

pump or the vacuum system, if the manual gas ballast
valve is open. If this constitutes a potential source of
danger, take appropriate safety measures, e.g., install
a solenoid operated gas ballast valve (see “Accesso­ries”, pg. 36).

• The pump is supplied dry (i.e., without oil lling) in order

to ensure that oil cannot make its way from the rotary

vane pump into the housing of the oil mist lter. A can

containing 0.5 liter (0.53 quarts) of rotary-pump oil is
supplied with the pump. Before starting the pump for

page 24 of 56

the rst time, remove the manometer and its adapter
(open end wrench width 17 mm) and pour in the oil as
described below.

Note: Because new oil contains gas, a considerable

degree of foaming can occur during operation with new
oil, and oil could penetrate the oil separator.

- Pour only approx. 350 ml (0.37 quarts) of oil into the

pump (bringing oil level to ”min.” mark, approx.).

- Reinstall the manometer (carefully re-seating the O-

ring) and with inlet line closed, operate the pump for
approx. 5-10 minutes.

- Add approx. 100 ml (0.11 quarts) of oil. As a rule, it

is not necessary to use all of the oil supplied. Do not

overll!

NOTICE

• Check the power source and the pump’s rating plate

to be sure that the power source and the equipment
match in voltage, phase, and frequency.

Keep a distance of minimum 8 in (20 cm) between fan and
adjacent equipment or casework.
Use connecting hoses with large diameter and keep them

as short as possible to avoid ow losses. Locate the pump

as closely as possible to the application. Use only hoses
at the inlet and outlet of the pump with an inner diameter
at least as large as the diameter of the pump’s connec­tions.

Always install outlet tubing descending from the pump to

avoid backow of condensate towards the pump.

Use a suitable valve (see”Accessories”, pg. 36) to iso­late the pump from the vacuum application. This is to allow
the pump to warm up before pumping condensable vapors
and to clean the pump after use before it is switched off.

When assembling, ensure vacuum-tightness. After as­sembly, check the whole system for leaks.

Secure hose connections at the pump appropriately, e.g.,

page 25 of 56

with hose clamps, to protect against accidental detach­ment.

Note: The pump must only be operated in a horizontal
position. When transporting a pump containing oil, take
great care not to tilt the pump to an angle that would allow

oil to make its way into the lter element.

During operation

➨ Vent and dispose of potentially dangerous gases or

vapors at the outlet of the pump appropriately.

+ Due to the high compression ratio, the pump might gen-

erate overpressure at the outlet. Check pressure com­patibility with system components (e.g., exhaust tubing
or exhaust valve) at the outlet. Ensure that the pump
outlet is neither blocked nor restricted.

+ Maximum ambient temperature: 104 °F (40 °C)
Check the maximum temperatures, if installing the

pump in a cabinet or a housing. Make sure ventilation
is adequate, especially if the ambient temperature is
elevated.

• If the pump is installed at an altitude of more than 6500

ft (2000 m) above mean sea level, check compatibility
with applicable safety requirements, and adopt suitable
measures. There is a risk of the motor overheating due

to insufcient cooling.

• Check compatibility with the maximally permitted

pressures at inlet and outlet and the maximum pres­sure difference between inlet and outlet ports.

• Check the oil level of the rotary vane pump every time
before starting the pump, however at least once a week.
Check the oil level more frequently if high amounts of
gas or vapor are pumped.

page 26 of 56

• If pumping aggressive, corrosive or otherwise danger­ous gases and vapors, take appropriate measures to
protect personnel, pump, and environment. Use appro­priate equipment such as cold trap, separator, oil sepa-

rator, full ow oil lter, shut-off valve, or exhaust waste

vapor condenser (see “Accessories”, pg. 36) as well
as special oil.

NOTICE

The ambient temperature should be at least 54°F (12
°C). Otherwise the pump may not start because of the
high oil viscosity at low temperature.

Pumping down can be started at any pressure at the inlet
below atmospheric pressure.
Do not start the pump if the pressure at the outlet port

exceeds 16.0 psi (1.1 bar) absolute.

Continuous operation is possible at any pressure below

atmospheric pressure.
Oil consumption will increase at inlet pressures above 75
Torr (100 mbar). Check oil level more frequently.

Prevent internal condensation, transfer of liquids or dust.
The pump unit as well as the diaphragms and valves will

be damaged if liquids are pumped in signicant amounts.

Check the pump regularly for external soiling and depos­its. Clean the pump if necessary to avoid an increase of
the pump’s operating temperature.

In case of overload, the motor is shut down by a self-hold

thermal circuit breaker in the winding.
Note: Only a manual reset is possible. Switch off the

pump and disconnect the electrical power cord. Identify

and eliminate the cause of failure. Wait approximately ve

minutes before restarting the pump.

Avoid high heat supply (e.g., due to hot process gases).
See “Technical data”, pg. 18, for maximum permitted
gas and ambient temperatures.

page 27 of 56

A warm up period (approximately 30 min.) is required to
ensure that the rated ultimate vacuum and pumping speed
as well as the full vapor pumping rate and chemical resis­tance of the pump are attained. To warm up the pump
effectively before connecting to the vacuum application,
install a shut-off valve (see ”Accessories”, pg. 36).
The attainable ultimate vacuum is limited by the properties
of the vacuum vessel (leak-tightness, cleanliness and de­gassing of the inner surfaces), degassing of substances
used and the condition of the pump oil (cleanliness, con­tent of hydrocarbons with higher partial pressures).

Use the manometer monitoring the pressure in the oil
reservoir of the HYBRID pump to check the operability of
the diaphragm pump. If during the process the pressure
inside the oil reservoir should rise signicantly (manome­ter needle clearly in the red zone), it is necessary to take
appropriate measures to reduce the inlet pressure.

For the HYBRID principle to work it is necessary to
prevent the pumped vapors from condensing inside
the oil reservoir. Therefore the pressure inside the
oil reservoir has to be lower than the vapor pressure
of the pumped media at the oil’s temperature (140°F
(60°C)). If necessary, the volume of pumped vapors
has to be reduced or a cold trap has to be installed.

If no improvement is achieved even with the vacuum
chamber being absolutely leak tight, this points to a po­tential failure of the diaphragm pump, e.g., a diaphragm
crack. A more accurate check of the pressure inside the oil
reservoir is possible with a more precise manometer, e.g.,
a DVR 2 digital vacuum gauge. If a pressure higher than
19 Torr (25 mbar) is measured with inlet port and gas bal­last valve closed, check the diaphragm pump and replace
the diaphragms if necessary.
Any drop in the diaphragm pump’s pumping speed pro­duces a pressure increase in the oil reservoir. Although
this does not have a direct effect on the pumping speed
and on the ultimate vacuum attainable by the HYBRID
pump, it does have a considerable effect on the aging of
the oil and the HYBRID pump’s chemical resistance.

page 28 of 56

All bearings are encapsulated and are lled with long-life

lubricant. Under normal operating conditions, the drive
system is maintenance free. The valves and diaphragms
are wear parts. Aging of the oil of the rotary vane pump
necessitates oil changes.

Important notes regarding the use of gas bal­last

Gas ballast is a continuous purge to keep the pump’s in­terior as clean as possible and to reduce the possibility of
condensation inside the pump.

NOTICE

➨ Air and pumped media might react inside the pump or

at the outlet of the pump and form hazardous or explo­sive mixtures, when you use air rather than inert gas

for the gas ballast. This constitutes a risk of signicant

damage to equipment and/or facilities, a risk of person­al injury or even loss of life.

+ Make sure that air/gas intake through the gas ballast

valve can never lead to hazardous, explosive or other­wise dangerous mixtures. If in doubt, use inert gas.

To reduce condensation in the pump, do not pump vapor
before the pump has reached its operating temperature.
Open the gas ballast valve when pumping condensable
vapors.

gas ballast
(open)

For condensable vapors (water vapor, sol-
vents, etc.):

- Let the pump run with gas ballast to reduce

condensation of pumped substances (water

vapor, solvents, ....) in the pump or to de-

contaminate the pump oil from volatile sub­stances.

- With gas ballast valve open, the ultimate vacuum will
be reduced.

page 29 of 56

- Use inert gas for gas ballast to avoid the formation of
explosive mixtures.

- To open and to close the gas ballast valve turn the gas
ballast valve cap. The manual gas ballast valve is open
if the arrow on the gas ballast cap is pointing towards
the inlet of the pump respectively towards the labelling
”Gasballast”.

- Close the manual gas ballast valve by turning the cap
180°.

Operate the pump without gas ballast only in case of

a clean system or when there are no condensable va­pors.

NOTICE

Do not pump vapors until the pump has reached its oper­ating temperature. Install an in-line valve in the inlet line
and open it only approx. 30 minutes after the pump has
been started.

Check the maximum vapor inlet pressure. The pump can
operate continuously at any pressure lower than the maxi­mum specied inlet pressure for vapor. Avoid sudden va­por surges when evacuating commences (large inner sur­faces, large-volume vacuum vessel).

Use a ow-control valve in the inlet line and open the valve

gradually.

Operating the pump with condensate in the catchpots

NOTICE

Observe the condensate levels in the catchpots of the sep-

arator at the inlet and of the oil mist lter. The condensate

level in an optional separator at the inlet must always be
kept below the bottom of the separator tube. The conden-

sate level in the oil mist lter must always be kept below
the bottom edge of the lter.

Drain condensate in time. To drain condensate, switch off
and vent the pump. Then open drain screw of the catch­pot. Condensate of the inlet catchpot (see ”Accessories”,

page 30 of 56

pg. 36) in particular must not be drained while pump is
operating.

In case of a clogged lter, oil mist might be visible in the
oil lter housing, or the lter might be discolored or exhibit
deposits on the inside. If the lter element is clogged, dis­assemble the oil mist lter and replace the lter element.
Under certain circumstances, clogged lter elements can

be cleaned using suitable solvents. However, it is safer to

use a new lter element (see section ”Replacing the lter
element in the oil mist lter”, pg. 49).

Do not reuse separated oil if it is contaminated or discol­ored.

+ Important: Comply with regulations when disposing

of solvents/condensates. Recycle if possible; purify if
contaminated.

Pumping chemically aggressive or toxic gas­es and vapors

➨ Avoid explosive conditions when compressing explo-

sible and ammable substances/mixtures. In such in­stances, use inert gas for gas ballast.

Attention: The gas ballast of the diaphragm pump is

permanently connected to the system.

+ Implement special protective measures to protect per-

NOTICE

sonnel, pump, and environment.

• Install a cold trap (see ”Accessories”, pg. 36), if the

thermodynamic conditions of the application are such
that vapors could condense in the rotary vane pump.

Wait until the pump has reached its operating tempera-

ture before connecting it to the vacuum system.

Before switching off, allow the pump to run for a few min-

utes, initially with the rotary vane pump‘s gas ballast valve

page 31 of 56

open and then with the gas ballast valve closed, after the
pump has been isolated from the vacuum application.
Prevent internal condensation, transfer of liquids or dust.
The pump requires regular inspection and maintenance.

Shutdown

NOTICE

Has the pump been exposed to condensate?

- Allow the pump to continue to run for a few minutes
with the rotary vane pump’s gas ballast valve open be­fore switching off.

Long-term:

- Separate the pump from the application.

- Drain condensates (catchpots of the separator at the

inlet and of the oil mist lter).

- Flush the pump with dry nitrogen.

- Carry out oil change (see “Oil change”, pg. 32).

- Fill the pump completely with new oil (to above the
”max.” mark!).

Attention: Before restarting the pump, drain oil to the

maximum oil level (”max.” mark)!

- Close the manual gas ballast valve.

- Close inlet and outlet ports (e.g., with transport caps or

blind anges).

- Store the pump under dry conditions.

- Carry out oil change and maintenance prior to use if the
pump has been stored for longer than one year.

Note: When transporting a pump containing oil, take great
care not to tilt the pump to an angle that would allow oil to

make its way into the lter element. Drain oil if necessary.

Oil change

➨ Never operate the pump if parts of the pump are dis-

assembled. Ensure that the pump cannot be operated
accidentally.

➨ Before starting maintenance, isolate the pump from its

application and disconnect the electrical power cord.

➨ Note: The pump or the pump oil might be contami-

nated with dangerous or corrosive process chemicals
that have been pumped during operation. Adopt suit­able decontamination measures if necessary. Take ad­equate precautions to protect people from the effects of

page 32 of 56

dangerous substances if contamination has occurred.
Ensure that the maintenance technician is familiar with
the safety procedures which relate to the products pro­cessed by the pumping system.

+ Use appropriate protective clothing, safety goggles and

protective gloves. Avoid inhalation and skin contact.

• Take adequate precautions when handling pump u­ids, lubricants, and solvents. Use appropriate protective
clothing, safety goggles and protective gloves to avoid
excessive contact with the skin and possible skin irrita­tions (including dermatitis).

Comply with all relevant statutory requirements and

regulations concerning the handling, storage and dis­posal of oil.

NOTICE

Aging of the oil (as indicated by darker color compared to
new oil, strange odor of the oil, particles in the oil, or con­tamination) necessitates an oil change.
Depending on the application (especially if corrosive gas­es or vapors have been pumped) it may be appropriate to
check the oil frequently and to carry out an oil change, if
necessary.

page 33 of 56

Under normal operating conditions:

- Check oil level every time before starting the pump.

- Carry out an oil change once aging of the oil is indi­cated by darker color compared to new oil.

- Carry out oil changes at least once a year.

- Dispose of the used oil, which may be contaminated,
according to all applicable regulations.

If the oil contains small quantities of water/solvent:
+ The oil can be cleaned to a certain extent by operating

the pump for 1 - 2 hours with the inlet line sealed and
the gas ballast valve open.

Oil change procedure

(8)

(10)

(1)

+ Carry out the oil change only after the pump has reached

its normal operating temperature.

➨ Switch off the pump and isolate it from its application.

Ventilate the pump to atmospheric pressure. Discon­nect the electrical power cord. To vent the oil reservoir,
remove the manometer with its adapter carefully (open
end wrench width 17 mm). Pay attention to the O-ring!
Do not turn the manometer itself as leaks might be
caused!

+ Choose a suitable pad; oil may drip. Use a suitable

container to catch the oil.

➨ Place a suitable container below the oil outlet

(9).

➨ Remove the oil drain plug (9) below the rat-

ing plate, paying attention to the O-ring.

➨ Tilt the pump slightly and catch the oil in a

(9)

suitable container.

+ Dispose of the used oil according to regula-

tions.

➨ Screw in oil drain plug (9) with O-ring.
➨ Screw in manometer with O-ring.
➨ To ush the pump, pour in fresh oil (approx. 0.05 quarts

(50 ml)) through the pump inlet (1) (remove separator if
necessary).

page 34 of 56

➨ Operate the pump briey. Drain ushing oil and repeat

ushing procedure, if necessary, until all contamina­tions are ushed out.

➨ Remove the manometer (see above). Add fresh oil (at

rst approx. 0.37 quarts (350 ml) only) through the oil

inlet port for the oil level to reach the ”min.” mark (10).

➨ Close the oil inlet port (8). Operate the pump with

closed inlet for approx. 5-10 minutes.

➨ Top off the oil (add approx. 0.11 quarts (100 ml)). As a

rule, it is not necessary to use the maximum quantity of
oil. Do not overll!

➨ Screw in manometer with O-ring.

Note: The oil degasses and foams at low pressures. This
is a welcome condition which helps to protect the pump
against corrosion and to prolong the working life of the oil.

The quantity, condition and quality of the pump oil have a
decisive effect on the pump’s performance and depend­ability.

Important: It may not be possible to reach the specied

ultimate vacuum if an oil other than VACUUBRAND B-oil
is used. Similarly, failure to use the recommended oil may
impair cold-start performance and pump lubrication!

Notes on choosing the appropriate oil for the application

The standard oil for VACUUBRAND rotary vane pumps is the B-oil. This

is a mineral oil, which is used for the rst lling of the pump.

The advantages of the B-oil are: Flat viscosity curve, low vapor pressure,
good chemical resistance, extended stability when pumping oxidants,
acid or basic vapors compared to conventional mineral oils, and good
skin compatibility.

Certain pumped media may attack the conventional oil in the pump. Spe­cial oils can be used preventively. It is at the users’ responsibility to check
if the materials of the wetted parts are resistant against the pumped sub­stances. This is also mandatory if special oils are used.

page 35 of 56

Special oils:

Rotary vane pump oil K8

The rotary vane pump oil K8 is a special oil designed for pumping acid
vapors. The oil is very hygroscopic and has a limited capacity for acids.
With decreasing pH, the anticorrosive effect decreases as well, and it is
necessary to change the oil at appropriate intervals. When the pump will
stand still for prolonged periods (i.e., for several days), the oil must be

drained and the pump must be lled with mineral oil.

Synthetic oil (peruoropolyether oil, e.g., Fomblin®*)

Synthetic oils have an excellent chemical resistance and are certied

for pumping pure oxygen. Therefore these oils are excellent for handling
strong oxidants, e.g., halogens, nitrogen oxides, etc.

Attention: As peruoropolyether oils mixed with mineral oils result in an

emulsion, pumps used with these oils must be absolutely free of any
residues of mineral oils. To accomplish this, you must completely disas­semble and diligently clean the pump unit.

* reg. trade mark Montedison

Attention if using special oils: Due to a different viscosity / density com-

pared to the standard oil, pumps lled with special oil may not achieve
the specied ultimate pressure, or the pumps may not start reliably at

temperatures below 54°F (12°C).

VACUUBRAND B-oil

1 liter (1.06 qt) ...............................................................................................687010

5 liter (5.3 qt) .................................................................................................687011

20 liter (5.3 gal)..............................................................................................687012

200 liter (52.8 gal)..........................................................................................687013

Rotary vane pump oil K8

1 liter (1.06 qt) ...............................................................................................687100

5 liter (5.3 qt) .................................................................................................687101

20 liter (5.3 gal)..............................................................................................687102

Peruoropolyether oil

500 ml (0.53 qt) .............................................................................................687600

Accessories

page 36 of 56

Glass cold trap GKF 1000i ...........................667056

at the inlet

Protection of the pump against aggressive substanc­es, protection of the recipient against oil molecules.

Separator AK R at the inlet ............................ 698006

Protection of the pump against damaging liquid and
solid substances, protection of the vacuum chamber

against back ow of pump oil.

Retrot kit

Chemistry pumping unit PC 8 .....................699949

Pump base with pre-mounted exhaust waste vapor

condenser and collecting ask.

Shut-off valve

Ball valve VKE 16, KF DN 16 .........................675004

Buttery valve

VS 16C ...........................................................665007

page 37 of 56

Hose nipple, aluminum, for hoses DN 19.....................................................662531

Vacuum hose (rubber, DN 20)......................................................................686005

PTFE vacuum hose (antistatic) with stainless steel small anges. The inner side of

the PTFE hose is smooth for increased chemical resistance, reduced deposits and
high conductance

KF DN 16, 500 mm (19.7”) ............................................................................686030

KF DN 16, 1000 mm (39.4”) ..........................................................................686031

KF DN 25, 500 mm (19.7”) ............................................................................686032

KF DN 25, 1000 mm (39.4”) ..........................................................................686033

Vacuum gauge DCP 3000 with gauge head VSP 3000 (Pirani),

2

7.5*10

Torr - 1*10-3 Torr (1*103 mbar - 1*10-3 mbar) .....................................683190

100-230V 50/60 Hz

Maintenance kit RC 6 .................................................................................649990

(rotary vane pump and diaphragm pump)

➨ A service manual with exploded view drawings, spare parts list and

directions for repair is available on request.

+ The service manual is intended for trained service people only.

page 38 of 56

Troubleshooting

Fault Possible cause Remedy

❑

Pump does not
start.

➨

Electrical power cord
not plugged in, electri­cal supply failure?

➨

Supply voltage does
not correspond with
the pump (see rating
plate)?

➨

Start-up control defec­tive?

➨

Oil temperature below
54°F (12°C)?

➨

Pump unit of rotary
vane pump contami­nated?

➨

Motor thermally over­loaded?

✔

Plug in power cord.
Check fuse.

✔

Connect pump to a suit­able supply voltage.

✔

Contact local distributor.

✔

Operate the pump in suit­able ambient conditions.

✔

Perform maintenance or
clean the pump unit.

✔

Allow motor to cool down
(< 50°C (122°F)), iden­tify and eliminate cause
of failure. Manual reset
is necessary. Switch off
pump or unplug. Provide

sufcient ventilation.

❑

Pump does not
achieve its ultimate
vacuum or usual
pumping speed.

➨

Overpressure in outlet
line?

➨

Oil mist lter clogged
(lter element in con-

tact with oil) or over-

lled?

➨

Pump seized?

➨

Measuring procedure
or vacuum gauge not
suitable for the applica­tion?

➨

Inlet blocked?

➨

Centring ring at small

ange connection not

correctly positioned?

✔

Remove blockage in line,
open valve.

✔

Drain oil, replace lter

element if necessary.

✔

See below.

✔

Choose a suitable mea­suring procedure or vacu­um gauge.

✔

Open inlet. Ensure that
the inlet line does not be­come blocked.

✔

Check small ange con­nections.

➨

Long, narrow vacuum

line?

✔

Use lines with larger di­ameter, length as short as
possible.

page 39 of 56

Fault Possible cause Remedy

❑

Pump does not
achieve its ultimate
vacuum or usual
pumping speed.

➨

Leak in the pipeline or

vacuum system?

➨

Long, narrow vacuum

line?

➨

Not enough oil?

➨

Wrong type of oil?

➨

Oil contaminated (also
with solvents)?

➨

Outgassing substances
or vapor generated in
the process?

✔

Check pump directly ­connect vacuum gauge
directly at pump inlet ­then check connection,
pipeline and vacuum
system if necessary.

✔

Use lines with larger di­ameter, length as short as
possible.

✔

Top up oil to correct level.

✔

Change oil and ush with

oil (see ”Oil change”).

✔

Change oil and ush with

oil (see ”Oil change”).

✔

Check process parame­ters.

❑

Pump too noisy or
strange noise.

➨

Pump has not yet
reached its operating
temperature?

➨

None of the above
mentioned causes?

➨

Too much oil?

➨

Motor thermally over­loaded?

➨

Diaphragm damaged?

➨

Pump seized?

➨

Overpressure in outlet
line?

➨

None of the above
mentioned causes?

✔

Allow the pump to reach
its operating temperature.

✔

Contact local distributor.

✔

Lower oil level to mark

”max.”.

✔

Allow motor to cool down
(< 50°C (122°F)), identify
and eliminate cause of

failure. Provide sufcient

ventilation.

✔

Replace diaphragm.

✔

See below.

✔

Remove blockage in line,
open valve.

✔

Contact local distributor.

❑

Oil in the inlet line.

➨

Back diffusion (small

amount of oil, oil lm)?

➨

Back streaming (large
amount of oil)?

✔

Install a sorption trap or a
separator, if necessary.

✔

Contact local distributor.

page 40 of 56

Fault Possible cause Remedy

❑

Oil leakage.

❑

High oil consump­tion.

❑

Fast aging of the
oil.

➨

Oil spilled?

➨

Other cause?

➨

High inlet pressure?

➨

Operation with gas bal­last?

➨

Oil level too high?

➨

Pumping aggressive
gases?

➨

Condensation in the
pump?

➨

Oil mist lter defective?

✔

Absorb the oil and dis­pose of according to reg­ulations.

✔

Contact local distributor.

✔

Normal. Top off oil when­ever necessary. Install oil

mist lter at outlet.

✔

Top off oil whenever nec-

essary. Install oil mist lter

at outlet.

✔

Lower oil level to mark

”max.”.

✔

Use suitable oil.

✔

Use separator or cold
trap.

✔

Replace lter. Check

safety pop valve.

❑

Pump seized.

➨

Diaphragm pump does
not reach its pumping
speed?

➨

Ambient temperature
too high ( > 104 °F
(40°C))?

➨

None of the above
mentioned causes?

✔

Perform maintenance of
diaphragm pump.

✔

Provide sufcient ventila­tion.

✔

Contact local distributor.

page 41 of 56

Replacing diaphragms and valves

+ Please read section ”Replacing diaphragms and valves” com-

pletely before starting maintenance.

The pictures may show other versions of pumps. This does not change

the method of replacing diaphragms and valves.

➨ Never operate the pump if covers or other parts of

the pump are disassembled.

➨ Before starting maintenance, disconnect the electri-

cal power cord. Wait two minutes after isolating the

equipment from AC power to allow the capacitors to
discharge.

➨ Ensure that the pump cannot be operated accidentally.
➨ Note: The pump might be contaminated with the pro-

cess chemicals that have been pumped during opera­tion. Ensure that the pump is decontaminated before
maintenance.

➨ Avoid the release of pollutants.

+ Never operate a defective or damaged pump.

+ Take adequate precautions to protect people from the

effects (e.g., in case of inhalation or skin contact) of
dangerous substances that may have contaminated
the pump and may be released upon disassembly. En­sure that the maintenance technician is familiar with
the safety procedures which relate to the products pro­cessed by the pumping system.

Use appropriate protective clothing, safety goggles and

protective gloves.

+ Check every motor capacitor regularly by measuring its

capacity and estimating its service life. Replace old ca­pacitors early enough to prevent a failure. The capaci­tors must be replaced by a trained electrician.

+ Allow sufcient cooling of the pump before starting

maintenance. Drain condensate, if applicable.

+ Vent the pump and isolate it from the vacuum sys-

tem before you start maintenance.

page 42 of 56

NOTICE

Ensure that maintenance is done only by suitably
trained and supervised technicians.

The valves and diaphragms as well as the motor capaci­tors are wear parts. At the latest if the pressure inside the

oil reservoir should rise signicantly (manometer needle

clearly in the red zone), or in case of increased noise level,
the pump interior, the diaphragms and the valves must be
cleaned and the diaphragms and valves must be checked
for cracks or other damage.

All bearings are encapsulated and are lled with long-life

lubricant. Under normal operating conditions, the drive
system is maintenance free.

The operability of the diaphragm pump can be checked as
well by measuring the pressure in the oil reservoir:
➨ Unscrew the manometer with its adapter (open end

wrench width 17 mm). Remove the hose nozzle from
the distributor plate (outlet) and install at the oil inlet.
Make sure the O-ring is seated correctly.

➨ Using a suitable vacuum gauge (e.g., DVR 2) and mak-

ing sure that it is correctly calibrated, measure the pres­sure in the oil reservoir. When the pump operates with
the inlet line closed, the measured pressure in the oil
reservoir should be less than 25 mbar (19 Torr) (with
gas ballast valve of rotary vane pump closed).

➨ Remove the hose nozzle from oil inlet. Reinstall it in the

distributor plate and reassemble the manometer with
O-ring.

In demanding circumstances, it may be efcient to

check and clean the pump heads on a regular basis. In
normal use, the lifetime of the diaphragms and valves
is more than 10,000 operating hours.

- Prevent internal condensation, transfer of liquids or
dust. The diaphragms and valves will be damaged if

liquid is pumped in signicant amount.

- Carry out maintenance frequently if the pump is ex­posed to corrosive media or in case of deposits.

- Regular maintenance will improve the lifetime of the
pump and also protect both users and the environment.

page 43 of 56

Diaphragm ....................................................................................................639786

Valve .............................................................................................................638440

Vacuum gauge DVR 2..................................................................................682902

Diaphragm key (width 66 mm) ....................................................................636554

Tools required (metric):

- Phillips screw driver size 2

- Open-ended wrench 14/17 mm

- 5 mm wide Allen key

- Diaphragm key width 66 mm

Cleaning and inspecting the diaphragm pump heads

➨ Drain the catch pot of the oil mist lter before beginning maintenance

to prevent leaking of condensate!

➨ Drain oil (see ” Oil change”) to prevent oil from making its way into the

lter element. Rell pump with oil before restarting the pump!

➨ For maintenance, lay the pump on its side with the pump head to be

maintained at the top. Support the pump appropriately.

Attention: Prevent any damage to the oil mist lter or to the manome-

ter. Do not use the oil mist lter to prop up the pump.

➨ Loosen the union nuts of the hose connec-

tions at the pump head with an open-ended
wrench (17 mm).

A

➨ Remove the cover plate. Use a Phillips screw

driver size 2 to loosen both screws (A). Pay
attention to lock washers.

page 44 of 56

View of the disassembled pump head parts

6

7

8

9

1

2

3

4

5

1: Housing
2: Connecting rod
3: Washer
4: Diaphragm support disc
5: Diaphragm
6: Diaphragm clamping disc
with square head screw

➨ Turn the ttings with an open-ended wrench

7: Head cover
8: Valve
9: Housing cover with

housing cover insert

(14 mm) to detach the hoses from the pump
heads (1/4 of a turn at maximum).

+ Do not remove the elbow ttings from the

pump heads; during reassembly a leak may
result.

page 45 of 56

➨ Disassemble the housing cover to check the

diaphragm and the valves.

➨ Unscrew four Allen screws with a 5 mm wide

Allen key. Remove the housing cover with
housing cover insert together with the head
cover and the valves (head cover with valves
will remain within the housing cover).

+ Never remove parts by using a pointed or sharp-edged tool (e.g., screw

driver). We recommend to use a rubber mallet or compressed air (to
be blown carefully into port).

➨ Remove the head cover carefully from the housing cover. Note the

position and orientation of the valves and remove them.

+ Replace valves if necessary.

+ Check diaphragm for damage and replace if necessary.

+ Use petroleum ether or industrial solvent to remove deposits. Do not

inhale vapors.

Replacing the diaphragm

➨ Lift diaphragm carefully sidewise.
+ Never use a pointed or sharp-edged tool to

lift the diaphragm.

➨ Use the diaphragm key to grip the diaphragm

support disc below the diaphragm.

➨ Unscrew diaphragm support disc with dia-

phragm and diaphragm clamping disc.

+ If the old diaphragm is difcult to separate from the diaphragm support

disc, immerse assembly in naphtha or petroleum ether. Do not inhale
vapors!

➨ Check for washers between the diaphragm support disc and the con-

necting rod. Do not mix the washers from the different pump heads,
since these are set at the factory to ensure proper pump performance.
Make sure that the original number is reassembled at the individual
pump head.

page 46 of 56

+ Too few washers: The pump will not attain vacuum specication. Too

many washers: Diaphragm clamping disc will hit head cover, causing
noisy operation and possibly causing the pump to seize up.

➨ Position new diaphragm between diaphragm

clamping disc with square head screw and
diaphragm support disc.

+ Note: Position diaphragm with pale side

towards diaphragm clamping disc (facing
pump chamber).

+ Make sure that the square head screw of the diaphragm clamping disc

is correctly seated in the guide hole of the diaphragm support disc.

➨ Lift the diaphragm at the side. Place the diaphragm carefully together

with diaphragm clamping disc and diaphragm support disc in the dia­phragm key.

+ Avoid damage of the diaphragm: Do not excessively bend or crease

the diaphragm.

+ Assemble the original number of washers

between diaphragm support disc and con­necting rod.

➨ Screw diaphragm clamping disc , diaphragm,

diaphragm support disc, and washers to con­necting rod.

➨ Optimum torque for the diaphragm support disc: 4.4 ft.lbf (6 Nm), it is

recommended to use a torque wrench. Attach torque wrench to dia­phragm key (hexagonal bolt 6 mm wide).

Note: Never use the diaphragm key with any additional tools like tongs

or Allen keys without appropriate torque limitation.

page 47 of 56

Assembling the pump heads

➨ Bring the diaphragm into a position, in which

it is in contact with the housing and centered
with respect to the bore.

➨ Place the head cover over the diaphragm. Check for its correct orien-

tation by aligning it beforehand with the housing cover which has to be
put over it later on.

+ Pay attention that the diaphragm stays positioned centrally so that it

will become clamped uniformly between housing and head cover.

A

B

➨ Place the valves at their respective positions

on the head cover.

+ Make sure that the valves are correctly seat-

ed. See gure for the correct position of the

valves: Valves at the outlet with round cen­tered opening (A) under valve; valves at the
inlet with kidney-shaped opening (B) beside
valve.

➨ Place the housing cover with housing cover insert onto the head cover.
➨ By turning the eccentric bushing, bring the connecting rod into the up-

per turning point position (max. stroke of the rod).

➨ Loosely screw in the Allen head screws at

the head cover diagonally at rst slightly with

a 5 mm wide Allen key, then tighten.

+ Recommended torque: 8.9 ft.lbf (12 Nm).

page 48 of 56

Assembling the connecting hose

➨ Slip the hoses onto the hose connectors by

turning the ttings with an open-ended 14

mm wrench.

➨ Tighten the union nuts of the hose connec-

tions at the pump heads with an open-ended
17 mm wrench.

+ Tighten union nuts rst by hand and then

tighten one full turn using the open ended
wrench.

Replace diaphragm and valves of the opposite side of the
pump in the same way.

➨ Assemble the cover plate. Pay attention to lock washers. Put the pump

in normal operating position.

+ Attention: Make sure that the pump is lled with oil before switching it

on, rell oil if necessary (see ”Oil change”, pg. 32)!

Checking the operability of the diaphragm pump

Check the operability of the diaphragm pump by measuring the pressure
in the oil reservoir:
➨ Unscrew the manometer with its adapter (open end wrench width 17

mm). Remove the hose nozzle from the distributor plate (outlet) and
install at the oil inlet. Make sure the O-ring is seated correctly.

➨ Using a suitable vacuum gauge (e.g., DVR 2) and making sure that it

is correctly calibrated, measure the pressure in the oil reservoir. When
the pump operates with the inlet line closed, the measured pressure in
the oil reservoir should be less than 25 mbar (19 Torr) (with gas ballast
valve of rotary vane pump closed).

➨ Remove the hose nozzle from oil inlet. Reinstall it in the distributor

plate and reassemble the manometer with O-ring.

page 49 of 56

If the pump does not achieve the ultimate vacuum:

- Whenever the diaphragms and valves have been replaced, a break-in
period of several hours is required before the pump achieves its ulti­mate vacuum.

- In case of an unusual noise, switch off pump immediately and check
clamping disc positions.

If the specied ultimate vacuum is not achieved, and if this does not

change after the break-in period:
Check hose connectors at pump heads for leaks. If necessary recheck
valve seats and pump chambers.

Replacing the lter element in the oil mist lter

Filter element FO DN 10 .............................................................................640187

➨ Use a 5 mm wide Allen key to remove the drain plug (note O-ring tted

on drain plug). Drain condensate from catchpot.

➨ Position the pump on the side so that it rests on the side with the power

switch. Remove the Allen screws (5 mm wide Allen key) and remove
the catchpot (note sealing ring).

➨ Using a 5 mm wide Allen key, remove the Allen screw in the center

of the bottom lter thrust plate. Remove the lter element, both lter

thrust plates, and the top O-ring.

+ Clean or replace the lter element. Dispose of oil and lter element in

accordance with regulations.

➨ Assemble again in reverse order. Make sure that the O-ring and the

sealing ring are correctly seated.

Inspecting the safety pop valve

Safety pop valve ..........................................................................................638836

➨ Remove four countersunk screws

and lift off the distributor block.

+ Note the valve’s position before re-

distributor
block

moving it. Replace the valve if it is
damaged.

➨ Assemble again in reverse order.

page 50 of 56

Notes on return to the factory

Repair - return - DAkkS calibration

NOTICE

Safety and health of our staff, laws and regulations re­garding the handling of dangerous goods, occupational
health and safety regulations and regulations regard­ing safe disposal of waste require that for all pumps and
other products, the “Health and safety clearance form”,

pg. 126, must be sent to our ofce fully completed and

signed before any equipment is shipped to the authorized
service center.
Fax or mail a completed copy of the health and safety
clearance form to us in advance. The declaration must ar­rive before the equipment. Enclose a second completed
copy with the product. If the equipment is contaminated,
you must notify the carrier.

No repair / DAkkS calibration is possible unless the
correctly completed form is returned. Inevitably, there
will be a delay in processing the equipment if informa­tion is missing, or if this procedure is not followed.

If the product has come in contact with chemicals, radioac­tive substances or other substances dangerous to health
or environment, the product must be decontaminated pri-
or to sending it back to the service center.

- Return the product to us disassembled and cleaned
and accompanied by a certicate verifying decontami­nation or

- Contact an industrial cleaning and decontamination
service directly or

- Authorize us to send the product to an industrial clean­ing facility at your expense.

To expedite repair and to reduce costs, please enclose a
detailed description of the problem and the product’s op­erating conditions with every product returned for repair.

page 51 of 56

We submit repair quotations only on request and always
at the customer’s expense. If an order is placed, the costs
incurred for problem diagnosis are offset from the costs
for repair or from the purchase price, if the customer pre­fers to buy a new product instead of repairing the defec­tive one.

- If you do not wish a repair on the basis of our quo-

tation, the equipment may be returned to you dis­assembled and at your expense.

In many cases, the components must be cleaned in the
factory prior to repair.

For cleaning we use an environmentally friendly water­based process. Unfortunately the combined attack of el-

NOTICE

evated temperature, cleaning agent, ultrasonic treatment
and mechanical stress (from pressurized water) may re­sult in damage to the paint. Please mark in the health and
safety clearance form if you wish a repaint at your ex-
pense just in case such a damage should occur.
We will also replace parts for cosmetic reasons at your
request and at your expense.

Before returning the equipment, ensure that (if applicable):

- Oil sealed pumps: Oil has been drained and an ade-

quate quantity of fresh oil has been lled in to protect

against corrosion. Dispose according to regulations.

- Equipment has been cleaned and/or decontaminated
(inside and outside).

- All inlet and outlet ports have been capped.

- Equipment has been properly packed, (if necessary,
please order original packaging materials at your cost),

marked appropriately and the carrier has been notied

of any possible contamination.

- The completed health and safety clearance form is en­closed.

We thank you in advance for your understanding of the
necessity for these measures that protect our employees,
and ensure that your pump is protected in shipment.

page 52 of 56

Scrapping and waste disposal:

Dispose of the equipment and any components removed
from it safely in accordance with all local and national
safety and environmental requirements. Particular care
must be taken with components and waste oil which have
been contaminated with dangerous substances from your

processes. Do not incinerate uoroelastomer seals and

O-rings.

- You may authorize us to dispose of the equipment at

your expense.

Warranty

page 53 of 56

VACUUBRAND shall be liable for insuring that this prod­uct, including any agreed installation, has been free of de­fects at the time of the transfer of risk.

VACUUBRAND shall not be liable for the consequences
of improper handling, use, servicing or operation of this
product or the consequences of normal wear and tear of
wearing parts such as diaphragms, seals, valves, vanes,
condensers, oil and the breakage of glass or ceramic
parts, for the consequences of chemical, electrochemical
or electrical inuences or the failure to follow the instruc­tions in this manual.

Claims for defects against VACUUBRAND shall be limited
to one year from delivery. The same shall apply to claims
for damages irrespective of legal grounds.

For further information on general terms and conditions
refer to www.vacuubrand.com.

page 54 of 56

Health and safety clearance form

Devices will not be accepted for any handling before we have received this declaration.
Please read and comply with ”Notes on return to the factory”.

Oil lled pumps: Drain oil prior to shipping absolutely!

1. Device (Model): ................................................................... 2. Serial no.: .........................................

3. Reason for return / malfunction:

..............................................................................................................................................................

4. Has the device been used in a copper process step (e.g., semiconductor production).
☐ yes ☐ no

5. Substances (gases, liquids, solids) in contact with the device / which have been pumped:

..............................................................................................................................................................

..............................................................................................................................................................

..............................................................................................................................................................

..............................................................................................................................................................

6. Prior to return to the factory the device has been decontaminated. ☐ yes ☐ no

Description of the decontamination method and the test / verication procedure:

..............................................................................................................................................................

..............................................................................................................................................................

7. The device is free of hazardous, harmful substances. ☐ yes ☐ no

8. Protective measures required for VACUUBRAND employees:

..............................................................................................................................................................

9. If the paint is damaged, we wish a repaint or a replacement of parts for reason of appearance (repaint

and replacement at customer’s expense). ☐ yes ☐ no

10. Legally binding declaration

We assure for the returned device that all substances, which have been in contact with the device are

listed in section 5 and that the information is complete and that we have not withheld any information. We
declare that all measures - where applicable - have been taken listed in section “Return to the factory”.

By our signature below, we acknowledge that we accept liability for any damage caused by providing in-

complete or incorrect information and that we shall indemnify VACUUBRAND from any claims as regards
damages from third parties. We are aware that as expressed in § 823 BGB (Public Law Code of Ger­many) we are directly liable for injuries or damages suffered by third parties, particularly VACUUBRAND
employees occupied with handling/repairing the product.

Shipping of the device must take place according to regulations.

Name: ....................................................................... Signature: ..............................................................

Job title: .................................................................... Company’s seal:

Date: .......................................................................

Release for repair grant by VACUUBRAND (date / signature): ..............................................................

VACUUBRAND GMBH + CO KG
Alfred-Zippe-Straße 4
97877 Wertheim, Germany

Tel.: [phone]
Fax: [phone]
E-Mail: [e-mail]
www.vacuubrand.com

page 55 of 56

EG-Konformitätserklärung für Maschinen

EC Declaration of Conformity of the Machinery

Déclaration CE de conformité des machines

Hersteller / Manufacturer / Fabricant:
VACUUBRAND GMBH + CO KG · Alfred-Zippe-Str. 4 · 97877 Wertheim · Germany

Hiermit erklärt der Hersteller, dass die Maschine konform ist mit den Bestimmungen der Richtli­nie 2006/42/EG.
Hereby the manufacturer declares that the machinery is in conformity with the directive 2006/42/
EC.
Par la présente, le fabricant déclare, que la machine est conforme à directive 2006/42/CE.

Drehschieberpumpe / Rotary vane pump / Pompe à palettes:
Typ / Type / Type: RC 6

Artikelnummer / Order number / Numéro d‘article: 698560, 698561, 698562

Seriennummer / Serial number / Numéro de série: Siehe Typenschild / See rating plate / Voir
plaque signalétique

Die Maschine ist konform mit weiteren Richtlinien / The machinery is in conformity with other di-

rectives / La machine est conforme à d’autres directives:

2006/95/EG, 2004/108/EG

Angewandte harmonisierte Normen / Harmonized standards applied / Normes harmonisées
utilisées:
DIN EN 12100-2, DIN EN 61010-1, DIN EN 1012-2, DIN EN 61326-1

Bevollmächtigter für die Zusammenstellung der technischen Unterlagen / Person authorized to

compile the technical le / Personne autorisée à constituer le dossier technique:

Dr. J. Dirscherl · VACUUBRAND GMBH + CO KG · Alfred-Zippe-Str. 4 · 97877 Wertheim · Ger­many

Wertheim, 09/10/2011

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ort, Datum / place, date / lieu, date

ppa.

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Dr. F. Gitmans)
Managing director / Gérant

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Dr. J. Dirscherl)

Technischer Leiter / Technical Director /

Directeur technique

VACUUBRAND GMBH + CO KG
Alfred-Zippe-Str. 4 · 97877 Wertheim
Tel.: [phone] · Fax: [phone]
E-Mail: [e-mail]
Web: www.vacuubrand.com

page 56 of 56

Alfred-Zippe-Str. 4 · 97877 Wertheim / Germany

Disclaimer: Our technical literature is only intended to inform our cus­tomer. The applicability of general empirical values and results obtained

under lab conditions to your specic operations depends on a number of

factors beyond our control. It is, therefore, strictly the users’ responsibil-

ity to very carefully check the application of these data to their specic

requirements. No claims arising from the information provided in this lit­erature will, consequently, be be entertained.

T [phone] · F [phone]

[e-mail] · www.vacuubrand.com

VACUUBRAND GMBH + CO KG

- Technology for Vacuum Systems -

© 2012 VACUUBRAND GMBH + CO KG Printed in Germany

Manual-no.: 997829 / 09/18/2012