English (GB) Installation and operating instructions
Caution
Note
Caution
English (GB)
Original installation and operating instructions.
CONTENTS
1.Symbols used in thi s do cumen t
2.General informati on
3.Product description
4.Applications
5.Maximum liquid pressure and temperature
6.Barrier fluid connections
7.Pump with pressure intensifier
7.1Components of pressure intensifier
7.2Dimensions of pump with pressure intensifier
8.Pump with dosing pump
8.1Dimensions of pump with dosing pump
9.Startup
9.1Pump with pressure intensifier
9.2Pump with dosing pump
10.Maintenance
11.Operation
11.1 Frost protection
12.Disposal
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
1. Symbols used in this document
Warning
If these safety instructions are not observed,
it may result in personal injury.
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Notes or instructions that make the job easier
and ensure safe operation.
Page
2. General information
These installation and operating instructions are a supplement to
installation and operating instructions for standard CR, CRI, CRN
pumps, publication No 96462123, and for CRN-SF pumps,
publication No 96530119.
2
2
3. Product description
2
This type of double seal consists of two shaft seals mounted in a
2
"back-to-back" arrangement in a separate seal chamber.
2
The pressure in the seal chamber is higher than the pump
3
pressure.
4
The double seal arrangement with pressurised seal chamber
4
prevents the pumped liquid from leaking to the environment via
4
the shaft seal.
The pressure in the seal chamber can be generated in three
4
ways:
4
• by means of a pressure intensifier (section 9.1)
5
5
• by means of a dosing pump (section 9.2)
6
• by means of an already existing system.
7
7
4. Applications
7
The shaft seal is available for the following Grundfos pumps:
This type of shaft seal is the optimum solution when handling
abrasive or sticky liquids which would either wear out, damage or
block a mechanical shaft seal.
Recommended for applications involving toxic, aggressive or
flammable liquids, the seal shaft protects the surrounding
environment and the people working in the vicinity of the pump.
If the shaft seal is used in applications where
special safety precautions must be observed due
to hazardous liquids, the customer bears full
responsibility!
5. Maximum liquid pressure and temperature
Due to the shaft seal design, the pressure in the seal chamber
must not exceed 25 bar. The pressure of the barrier fluid must
always be higher than the pressure of the pumped liquid.
The maximum temperature of the barrier fluid depends on the
rubber material of the shaft seal.
120CR150
Shaft sealMaximum temperature [°C]
EPDM+120
FKM+90
FFKM+120
FXM+120
2
6. Barrier fluid connections
Sensor
Inlet 1/2"
Outlet 3/8"
C/D
A
E
A
C/D
E
Sensor
Inlet 1/2"
Outlet 3/8"
C/D
A
E
A
C/D
E
Inlet 1/2"
Sensor
A
A
C/D
E
E
Outlet 3/8"
C/D
Key to the letters in the drawings:
Pos. A = pumped liquid.
Pos. C/D and E = barrier fluid.
Figures 1, 2 and 3 show where to fit a sensor (pos. A),
Warning
Pay attention to the orientation of the vent holes, and take care to ensure that the escaping liquid does not cause
personal injury or damage to the motor or other components.
When handling hot or hazardous liquids, special attention should be paid to the risk of personal injury.
When pumping flammable liquids, beware of static discharges. The funnel, for instance, should be earthed!
IllustrationStep Action
English (GB)
Operation with positive inlet pressure
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Open the isolating valve on the inlet side.
• Slowly fill the pump with the liquid to be pumped.
When the liquid starts running out of the vent hole, immediately
close the vent screw.
1
Operation with suction lift
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Fill the pump and the inlet pipe with the liquid to be pumped using a
funnel.
• When the liquid starts running out of the vent hole, immediately
close the vent screw.
TM02 2607 4601
TM02 2608 4601
Note: A non-return valve must be fitted to the inlet pipe.
Filling the seal chamber
• Fill the intensifier and the seal chamber with barrier fluid, and
connect the barrier fluid supply pipe to the unused inlet of the
intensifier (pos. 4, fig. 5). The pressure in the seal chamber must
always be 1.5 to 4 bar higher than the pump pressure when the pump
is not operating.
2
p
= ps* + 1.5 to 4 bar.
f
p
= To be read on the pressure gauge on the intensifier (pos. 8, fig. 5).
f
p
= To be read on the pressure gauge in the connection pipe
s
(pos. 9, fig. 5) between intensifier and pump.
* p
= inletpressure when the pump is not operating; must always be
s
0.1 to 5 bar higher than the atmospheric pressure.
Venting
During filling, the seal chamber and the intensifier must be vented:
• Use the vent screw at the top of the seal chamber (pos. C/D, fig. 1, 2
or 3) and the vent screw at the top of the intensifier (pos. 6, fig. 5).
3
TM02 2609 4601
TM02 2610 4601
TM02 2611 4610
Disconnecting the barrier fluid supply pipe
• Disconnect the barrier fluid supply pipe from the intensifier.
4
Starting up the pump
• See also the installation and operating instructions for standard CR,
CRI, CRN pumps.
• Start the pump, and check the direction of rotation.
See the correct direction of rotation on the motor fan cover.
5
• After a few minutes, vent the pump again by means of the vent screw
(pos. A, fig. 1, 2 or 3).
5
9.2 Pump with dosing pump
PS
PS
1,5 - 2 bar
PS
PS
PS
English (GB)
Warning
Pay attention to the orientation of the vent holes, and take care to ensure that the escaping liquid does not cause
personal injury or damage to the motor or other components.
When handling hot or hazardous liquids, special attention should be paid to the risk of personal injury.
When pumping flammable liquids, beware of static discharges. The funnel, for instance, should be earthed!
IllustrationStep Action
Connecting the barrier fluid supply pipe
• Connect one end to the seal chamber (pos. E, fig. 1, 2 or 3).
• Connect the other end to the outlet of the dosing pump.
1
TM02 2612 4601
Recommended pressure
• Set the start pressure of the dosing pump to a pressure 1.5 to 2 bar
above the highest pressure the pump can deliver.
(P
2
TM02 2613 4601
pump
Filling and venting the seal chamber
• Start the dosing pump.
• Fill and vent the seal chamber by means of the vent screw at the top
of the seal chamber (pos. C/D, fig. 1, 2 or 3).
3
The dosing pump will stop automatically when the pressure set in
step 2 has been reached.
+ P
inlet
+ P
1.5 - 2.0
< P
dosing max.
)
TM02 2614 4601
Operation with positive inlet pressure
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Open the isolating valve on the inlet side.
• Slowly fill the pump with the liquid to be pumped.
When the liquid starts running out of the vent hole, immediately close
the vent screw.
4
Operation with suction lift
• Open the vent screw (pos. A, fig. 1, 2 or 3) on the side of the pump
head.
• Close the isolating valve on the discharge side.
• Fill the pump and the inlet pipe with the liquid to be pumped using a
funnel.
• When the liquid starts running out of the vent hole, immediately close
the vent screw.
TM02 2615 4601
Note: A non-return valve must be fitted to the inlet pipe.
Starting up the pump
• See also the installation and operating instructions for standard CR,
CRI, CRN pumps.
• Open the isolating valve on the discharge side.
• Start the pump, and check the direction of rotation.
5
See the correct direction of rotation on the motor fan cover.
• After a few minutes, vent the pump again by means of the air vent
screw (pos. A, fig. 1, 2 or 3).
TM02 2616 4601
6
10. Maintenance
Note
See the installation and operating instructions for standard CR,
CRI, CRN pumps.
Pressure intensifier
The pressure intensifier is maintenance-free.
Dosing pump
See the installation and operating instructions for the dosing
pump.
11. Operation
To ensure optimum function and performance, check the pressure
regularly.
Pressure intensifier
The pressure difference between the two pressure gauges (seal
chamber and pump) must be between 1 and 1.5 bar.
This indicates that the seal chamber contains sufficient barrier
fluid.
Dosing pump
The pressure of the barrier fluid must always be 1.5 to 2 bar
higher than the pressure of the pumped liquid. This is
automatically checked by the pressure switch/ transmitter fitted
together with the dosing pump.
A very small quantity of the barrier fluid, i.e. less
than 10 ml/24 operating hours, will always flow
into the pumped liquid.
English (GB)
11.1 Frost protection
For general guidelines on frost protection of the pump, see the
installation and operating instructions for standard CR, CRI, CRN
pumps.
Seal chamber
Drain the seal chamber by slackening the lower plug
(pos. E, fig. 1, 2 or 3).
Pressure intensifier
Replace the barrier fluid by antifreeze liquid.
Dosing pump
For frost protection, see the installation and operating instructions
for the dosing pump.
Warnin g
If the pumped liquid is hazardous to health, take
special care when draining the pump.
Local safety regulations must be observed.
12. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
Subject to alterations.
7
8
Argentina
Bombas GRUNDFOS de Argentina S.A.
Ruta Panamericana km. 37.500 Centro
Industrial Garin
1619 Garín Pcia. de B.A.
Phone: +54-3327 414 444
Telefax: +54-3327 45 3190
Australia
GRUNDFOS Pumps Pty. Ltd.
P.O. Box 2040
Regency Park
South Australia 5942
Phone: +61-8-8461-4611
Telefax: +61-8-8340 0155
GRUNDFOS Sarajevo
Zmaja od Bosne 7-7A,
BH-71000 Sarajevo
Phone: +387 33 592 480
Telefax: +387 33 590 465
www.ba.grundfos.com
e-mail: grundfos@bih.net.ba
Brazil
BOMBAS GRUNDFOS DO BRASIL
Av. Humberto de Alencar Castelo Branco,
630
CEP 09850 - 300
São Bernardo do Campo - SP
Phone: +55-11 4393 5533
Telefax: +55-11 4343 5015
Bulgaria
Grundfos Bulgaria EOOD
Slatina District
Iztochna Tangenta street no. 100
BG - 1592 Sofia
Tel. +359 2 49 22 200
Fax. +359 2 49 22 201
email: bulgaria@grundfos.bg