IDEX Pump Technologies (Ireland) Ltd.,
A Unit of IDEX Corporation,
R79, Shannon, Co Clare, IRELAND.
TEL. : +353 61 471933 FAX. : +353 61 475046
Web Site : www.blagdonpump.com
E-Mail : sales@blagdonpump.com
Page 2
Page 3
G.A. Drawing & Performance Curve
General Assembly :- B50 05 Series 1 2:1 Metallic Pump, All dimensions +/- 3mm
HG-CF-1109 Rev. D – 03.11.11
B50 2:1 Metallic Pump Performance Curve, Performance based on water at ambient temperature
Page 3
Page 4
TECHNICAL DATA
FLUID CONNECTIONS CAPACITY MAX SOLIDS MAX DISCHARGE HEAD DISPLACEMENT/STROKE
2” BSP (F) 0 - 250 Litres/Minute
(0 - 55 Gallons/Minute)
6 MM
(1/4”)
88 Meters
(289 ft)
1.9 Litres
(0.42 UK Gallons)
MAX. WORKING PRESSURE AIR INLET TEMPERATURE LIMITS PUMP WEIGHTS :-
10 Bar (145 psi) 3/4” BSP (F) Determined by Elastomers AA :- 35 Kg CC:-70 Kg
Note ! Maximum discharge pressure must not exceed 10 bar.
Caution - Operating temperature limitations are as follows:
Materials
Buna-n - General purpose, oil resistant. Shows good solvent, oil, water and hydraulic fluid resistance. Should not
be used with highly polar solvents like acetone and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.
EPDM - Shows very good water and chemical resistance. Has poor resistance to oils and solvents, but is fair on
ketones and alcohols.
Neoprene - All purpose. Resistant to vegetable oil. Generally not affected by moderate chemicals, fats greases
and many oils and solvents. Generally attacked by strong oxidising acids, ketones, esters, nitro hydro carbons and
chlorinated aromatic hydrocarbons.
Santoprene® - Injection moulded thermoplastic elastomer with no fabric layer. Long mechanical flex life.
Excellent abrasion resistance.
PTFE - Chemically inert, virtually impervious. Very few chemicals are known to react chemically with PTFE :
molten alkali metals, turbulent liquid or gaseous fluorine and a few fluoro-chemicals such as chlorine trifluoride or
oxygen difluoride which readily liberate free fluorine at elevated temperatures.
Viton® -Shows good resistance to a wide range of oils and solvents : especially all alphatic, aromatic and
halogenated hydrocarbons, acids, animal and vegetable oils.
Polypropylene - High strength, light weight, corrosion resistant polyolefin which easily withstands most
chemicals, with no known solvent at room temperature.
TYPICAL CODE = B50 05 A A. W 1. N N S
CA :- 50 Kg
Operating Temperatures
Maximum Minimum Optimum
176oF
o
80
C
212oF
o
100
212oF
o
100
212oF
o
100
356oF
o
180
356oF
o
180
158oF
o
70
C
C
C
C
C
C
-18oF
o
-28
-11oF
o
-24
-4oF
o
-20
-10oF
o
-23
32oF
o
0
C
0oF
o
-18
-40oF
o
-40
C
C
C
C
C
C
50o to 140oF
o
10
to 60oC
50o to 212oF
o
10
to 100oC
50o to 130oF
o
10
to 54oC
50o to 212oF
o
10
to 100oC
50o to 212oF
o
10
to 100oC
75o to 212oF
o
24
to 100oC
50o to 140oF
o
10
to 60oC
MODEL - B50
DESIGN LEVEL
WETTED COMPONENTS
A : ALUMINIUM
C: CAST IRON
NON - WETTED COMPONENTS
A : ALUMINIUM
C : CAST IRON
VALVE TYPE
B : BALL
W : WEIGHTED BALL
SUCTION ORIENTATION
B : BOTTOM SUCTION, W1 SERIES
This pump should be used in accordance with the requirements of the Safety, Health & Welfare at Work Act 2005.
All business conducted subject to IDEX Pump Technologies, Ireland. Terms and Conditions of Sale, available on request.
VALVE SEATS
A : ALUMINIUM
S : 316 STAINLESS STEEL
VALVE BALLS
B : BUNA-N T : PTFE
E : EPDM V : VITON
N : NEOPRENE S : ST. STEEL
D : DELRIN (ACETAL)
DIAPHRAGMS
B : BUNA-N T : PTFE
E : EPDM V : VITON
H : POLYESTER (HYTREL)
N : NEOPRENE
P : POLYURETHANE
R : SANTOPRENE
O : ONE-PIECE PTFE
IMPORTANT
HG-CF-1109 Rev. D – 03.11.11
IDEX Pump Technologies (Ireland) Ltd.,
A Unit of IDEX Corporation,
R79, Shannon, Co Clare, IRELAND.
TEL. : +353 61 471933 FAX. : +353 61 475046
Web Site : www.blagdonpump.com
E-Mail : sales@blagdonpump.com
Page 4
Page 5
PRINCIPLE OF PUMP
OPERATION
This ball valve type diaphragm pump is
powered by compressed air and is a 2:1 ratio
design. The inner side of one diaphragm
chamber is alternately pressurised while
simultaneously exhausting the other inner
chamber. This causes the diaphragms, which are
connected by a common shaft secured by plates
to the centres of the diaphragms, to move in a
reciprocating action. (As one diaphragm
performs a discharge stroke the other diaphragm
is pulled to perform the suction stroke in the
opposite chamber.) Air pressure is applied over
the entire inner surface of the diaphragm while
liquid is discharged from the opposite side of
the diaphragm. The diaphragm operates in a
balanced condition during the discharge stroke
which allows the pump to be operated at
discharge heads of over 300 feet (91 meters) of
water.
For maximum diaphragm life, keep the pump as
close to the liquid being pumped as possible.
Positive suction head in excess of 10 feet of
liquid (3.048 meters) may require a back
pressure regulating device to maximize
diaphragm life.
Alternate pressurising and exhausting of the
diaphragm chamber is performed by an
externally mounted, pilot operated, 2 way type
distribution valve. When the spool shifts to one
end of the valve block body, inlet pressure is
applied to one chamber and the other diaphragm
chamber exhausts. When the spool shifts to the
opposite end of the valve body, the pressure to
Available from
Blagdon Pump :-
1. Pulsation Dampener
2. Filter/Regulator
3. Lubricator
4. Air Dryer
Installation Guide
Fig. 1
Shut-off
Valve
SUCTION
Drain Port
Air Inlet
Pipe Connection
(Style Optional)
Gauge
Exhaust
Flexible
Connection
Air
Air Exhaust
Pulsation
Dampener
the chambers is reversed. This alternating
movement of the spool inside the valve body is
controlled by a pilot air pressure signal held
against the diaphragm shaft, between seals in the
diaphragm shaft bushes. This signal is released,
triggering the movement of the spool, when pilot
holes in the diaphragm shaft align with the held
pilot signal, sending the signal to exhaust, which
in-turn causes a pressure imbalance around the
spool, sending it to the opposite end of the valve
body. This simultaneously sends inlet pressure
to the opposite chamber.
The chambers are connected by manifolds with a
suction and discharge ball valve in one chamber
only, the opposite chamber being blanked off,
and pressurised on the fluid side also, to create
the 2:1 ratio, maintaining flow in one direction
through the pump.
INSTALLATION
The typical installation shown in FIG. 1 is only a
guide to selecting and installing system
components. Your installation will depend on
the type of fluid being pumped and your
application needs. To reduce the risk of serious
bodily injury and damage to property, never use
fluids in this pump which are not compatible
with the wetted components. Contact your local
distributor or the manufacturer for system design
assistance & compatibility if necessary.
Mount the pump in an upright position. Failure
to ensure an upright position may result in loss
of or poor priming characteristics. Ensure the
pump is securely mounted to avoid movement
and possible risk of bodily injury.
CAUTION !
The air exhaust should be piped
to an area for safe disposition of
the product being pumped, in the
1
Pipe Connection
(Style Optional)
Flexible
Connection
Filter
Regulator/Lubricator
Gauge
Drain Port
event of diaphragm failure.
Shut-off
Valve
Air Dryer
2
3
DISCHARGE
Air Shut-Off
Valve
AIR
INLET
4
PRESSURE The pump delivers the same
pressure at the discharge outlet as the air
pressure applied at the air inlet (unless pump is
configured as a 2:1 ratio model).
NOTE: Pressure Regulator (H) should be
installed where air supply could exceed 125
psi.
SAFETY
Your BLAGDON PUMP is a high
performance unit capable of achieving
high outputs at high efficiencies. However, as
is common with pneumatic equipment, the
pump efficiencies is reliant upon the air being
clean, dry and filtered. Failure to comply with
these requirements may lead to loss of
performance and reduced component life and in
extreme cases, permanent damage to the pump.
To avoid leaks, ensure that all fluid connections
are tight. The use of PTFE thread tape correctly
applied should be used to ensure 100% leak
proof connections. Failure to ensure 100%
sealability of the suction connection could
adversely affect suction performance.
If you are pumping hazardous fluids, or
operating the pump in an enclosed area, it is
essential that the exhaust from the pump is
piped away to a safe location. When pumping
hazardous fluids the above instructions must be
adhered to in order to ensure safe operating
procedures. (Under certain operating
conditions the failure of internal components
can lead to the pumped fluid being exhausted
via the pump exhaust outlet).
WARNING
NEVER place your hands over or near the
pump suction inlet. Powerful suction could
cause serious bodily injury.
FLUSH THE PUMP This pump was tested
with water containing an oil-based rust
inhibitor. If this solution could contaminate or
react with the fluid you are pumping, flush the
pump thoroughly with a solvent/detergent to
clean internal components. The solvent/
detergent must be compatible with the pump
materials of construction. Care should be taken
to flush the pump each time it is disassembled
for maintenance or repair.
CAUTION All BLAGDON PUMPS are built
lubricated with grease during assembly and
need no further lubrication. If the use of oil
cannot be avoided, this will not present any
problems. A light No. 2 class lithium grease is
recommended. Other grades may cause the Air
Logic System to operate intermittently, thereby
causing a loss of output and failure to operate.
Other seals are available for “clean room”
conditions.
If the pump accelerates or is running too fast
due to a lack of fluid, then stop it immediately
by shutting off the air supply. A dry pump will
accelerate to a high speed causing wear to
elastomers.
If the fluid you are pumping tends to dry up or
set when it is not moving, then flush the pump
as often as necessary to prevent the fluid from
drying in the pump. Drain the pump thoroughly
before storing.
If feasible, invert pump to allow any fluid to
drain from the non-return valves
.
HG-CF-1109 Rev. D – 03.11.11
Page 5
Page 6
TROUBLE SHOOTING GUIDE
NOTE :- Check all solutions before dismantling the pump.
PROBLEM CAUSE SOLUTION
Pump will not start Air valve assembly malfunction/Siezure
Obstructed fluid line.
Obstructed diaphragm chamber.
Diaphragm failure causing fluid & excessive air to be
expelled through the exhaust.
Diaphragm seal failure.
Air valve system malfunction.
Air connected to exhaust.
Erratic flow Diaphragm failure on one side.
Valve ball not seating.
Suction leakage.
Diaphragm failure causing fluid & excessive air to be
expelled through the exhaust.
Diaphragm seal failure.
Air valve system malfunction.
Pump strokes but will not
discharge
Excessive suction lift.
Suction line leakage.
Valve ball not seating correctly or damaged.
Suction line or strainer clogged.
Diaphragm failure.
Fluid discharged from air
exhaust
Diaphragm Failure.
Loose frontplate.
Intermittent stroke rate Over lubrication
Diaphragm shaft seal failure.
Air valve system malfunction.
Valve ball not seating / partially obstructed.
Check carrier for freedom of movement. Clean, re-grease & replace.
Clean line or increase line size.
Remove obstruction.
Replace diaphragm.
Replace shaft seals.
Check all seals in valve chest assembly.
Re-connect to air inlet.
Replace diaphragm.
Check and remove obstruction.
Check and correct.
Replace diaphragm.
Replace shaft seals.
Check all seals in valve chest assembly.
Shorten suction line.
Check and correct.
Check and remove obstruction / replace.
Clear.
Replace diaphragm.
Replace diaphragm.
Re-Torque to manual specifications.
Shut-down pump. Remove air connection
into pump & introduce a small quantity of degreasing agent into air valve and replace
line. Run pump until clear.
Replace seals.
Check all seals in valve chest assembly.
Clear obstruction.
WARNING!
Read these safety warnings
and instructions in this manual
completely, before installation
the responsibility of the purchaser to retain
this manual for reference. Failure to comply
with the recommendations stated in this
manual will damage the pump, and void
factory warranty.
and start-up of the pump. It is
WARNING!
Before doing any maintenance
on the pump, be certain all
from the pump, suction, discharge, piping,
and all other openings and connections. Be
certain the air supply is locked out or made
non-operational, so that it cannot be started
while work is being done on the pump. Be
certain that approved eye protection and
protective clothing are worn all times in the
vicinity of the pump. Failure to follow these
recommendations may result in serious
injury or death.
pressure is completely vented
WARNING!
Airborne particles and loud
noise hazards. Wear ear and
eye protection.
WARNING!
Before maintenance or repair,
shut off the com-pressed air
disconnect the air line from the pump. The
discharge line may be pressurized and must
be bled of its pressure.
line, bleed the pressure, and
WARNING!
Take action to prevent static
sparking. Fire or explosion can
handling flammable liquids. The pump,
piping, valves, containers or other
miscellaneous equipment must be
grounded.
result, especially when
IMPORTANT!
This pump is pressurized
internally with air pressure
certain that all bolting is in good condition
and that all of the correct bolting is
reinstalled during assembly.
during operation. Always make
WARNING!
When used for toxic or
aggressive fluids, the pump
should always be flushed
clean prior to disassembly.
WARNING!
In the event of diaphragm
rupture, pumped material may
and be discharged into the atmosphere. If
pumping a product which is hazardous or
toxic, the air exhaust must be piped to an
appropriate area for safe disposition.
enter the air end of the pump,
CAUTION!
Before pump operation, inspect all gasketed fasteners
ket creep. Re-torque loose fasteners to
prevent leakage. Follow recommended
torques stated in this manual.
for looseness caused by gas-
RECYCLING
Many components of
BLAGDON air operated
double diaphragm pumps are
We encourage pump users to recycle worn
out parts and pumps whenever possible,
after any hazardous pumped fluids are
thoroughly flushed.
made of recyclable materials.
HG-CF-1109 Rev. D – 03.11.11
Page 6
Page 7
IMPORTANT!
Read these instructions
completely, before
installation and start-up. It
is the responsibility of the purchaser to
retain this manual for reference.
Failure to comply with the
recommendations stated in this
manual will damage the pump, and
void factory warranty.
SERVICE
The following sections give a general
overview on how to service all
models of BLAGDON Diaphragm
Pumps. For details on individual part
numbers, quantities, materials, etc.,
please consult the parts list supplied
with the pump.
NOTE :Before commencing
any service or maintenance work
on the pump, ensure that the air
supply has been disconnected or
isolated.
AIR VALVE SYSTEMS
PNEUMATIC TYPE Remove the 4
screws securing the valve block to
the valve chest, together with any
associated gaskets or seals.
Remove slide valve plate & slide
valve from the valve block assembly.
Clean all parts thoroughly and
inspect for excessive wear, replacing
where necessary.
The slide valve and valve plate
contact faces should be flat and free
from scratches. A light polishing on a
flat surface with a fine abrasive paper
will remove most scratches.
If excessive wear is suspected in the
valve block bore or valve carrier,
remove the valve block plugs and
withdraw the valve carrier. Check
valve block plug o-rings for wear or
attack & replace where required.
Clean the valve carrier & valve block
bore with white spirits to remove any
oil films.
NOTE :The nominal
diametrical clearance between the
valve carrier and the valve block
block bore should be 0.05 -
0.09mm. A clearance in excess of
this will cause the valve system to
run erratically.
Apply a light grease to the valve
block plug O-rings when reassembling into the valve block bore.
Any damage to the O-ring may cause
the valve system to malfunction.
Re-assemble the valve block
assembly & re-torque in accordance
to the settings shown in the parts list.
In the event of a complete air-side
overhaul, the pump should be disassembled down to the centre
section assembly as described later
in the “Wet-Side Overhaul” section.
With the valve block assembly
dismantled, remove the inner covers
where appropriate.
A careful note of the position of all
related seals and gaskets should be
made to facilitate re-assembly.
Remove diaphragm shaft bushes,
where appropriate, and check all
seals and ‘O’ rings for wear or
damage. If worn, replace
immediately.
NOTE:- The integrity of the
diaphragm shaft seals is essential
for the correct functioning of all
pneumatically actuated valve
systems.
Check the diaphragm shaft for
excessive wear as this will result in
premature seal failure. Replace as
required. Lubricate all components
and re-assemble as detailed above,
in reverse order. Ensure the correct
position of all components detailed in
all sectional assembly drawings.
WET-SIDE OVERHAUL
REPLACING BALL VALVES
Remove discharge manifold from
pump assembly together with
associated valve balls, seats and ‘O’
rings.
NOTE :- The orientation of the
valve seat relative to the valve ball
should be noted as incorrect
positioning may result in a
performance loss.
Turn pump through 180
the suction manifold. Clean and
inspect the components. Check for
any wear or damage and replace as
required.
NOTE :- Ball or valve seat wear
may result in loss of performance
and suction lift.
Re-assemble the valve balls/seats
and ensure manifolds are adequately
torqued to the settings shown in the
parts list.
o
and remove
REPLACING DIAPHRAGMS
Remove both suction and discharge
manifolds as detailed in the previous
section, removing all ball valves,
seats and ‘O’ rings.
Loosen and remove both outer
covers from the pump assembly.
The orientation of the covers should
be noted so as to facilitate reassembly.
Holding one of the frontplates in a
vice, (‘soft jaws’ should be fitted), or
with an adjustable spanner, loosen
and remove the frontplate from the
opposite end. Remove the
diaphragm, backplate and bumpstop
from diaphragm shaft.
Carefully withdraw the diaphragm
shaft from the centre section and
hold the free end in a vice, holding
between the flats machined on the
end. Loosen and remove the
frontplate and remove the diaphragm
together with backplate and
bumpstop (where fitted).
NOTE :- Care should be taken with
all plastic, coated and hygienic
pumps, so that the surface of the
frontplate is not damaged.
Thoroughly clean all parts and check
for wear, damage, swelling, cracking,
delamination and chemical attack.
Replace components where required.
NOTE :- Rubber diaphragms
should be replaced if they are
worn to such an extent that the
fabric re-enforcing is evident on
the surface of the diaphragm.
For pumps fitted with PTFE
diaphragms, a light coating of grease
should be applied to the back-up
diaphragm prior to re-assembly.
Before re-assembly, it is advisable to
check the condition of the diaphragm
shaft seal/’O’ rings for wear or attack.
If either is evident, it is recommended
that they be replaced.
Assemble the diaphragms onto the
shaft in a reverse sequence to their
removal. Care should be taken as to
the orientation of the diaphragm
relative to the front and back plates.
All diaphragms have “AIR SIDE”
moulded onto one side. The
backplate must be fitted adjacent to
the AIR SIDE of the diaphragm.
HG-CF-1109 Rev. D – 03.11.11
Page 7
Page 8
1
1
1
1
1
2
2
2
1
1
1
1
TRANSITION PLATE (ALL C.IRON ONLY)
COMMONCAST IRON
PART NUMBER DESCRIPTION QTY
PARTS LIST - cont.
38 1B123 PORT SEAL (ALL C.IRON 2 OFF)
39 - 50-273
40 50-261 VALVE BLOCK SEAL
41 50-248 SLIDE VALVE PLATE
42 50-251 SLIDE VALVE
43 H125 CIRCLIP
No.
REF
44 1C021 VA LVE BLOCK PLUG
45 G130 O-RING
VALVE BLOCK - BSP
46 50-246
DIAPHRAGM O-RING
VALVE
BALL - WTD.
VALVE BLOCK - NPT
BALL
VALVE
ELASTOMER TABLE
SEAT
50-247
47 1B124 VALVE CARRIER
48 1B039 DIAPHRAGM - PTFE
49 1B054 SUPPORT DIAPHRAGM
QTY. 2 2 2 1 4
REF. NO 2 3 3 8 15
MATERIAL VALVE
BUNA-N - 1B010 1B079 1B004 G029
EPDM - 1B052 1B080 1B002 G031
VITON - 1B055 1B088 1B003 G119
NEOPRENE - 1B056 1B027 1B001 G149
PTFE - 1B053 - SEE 48 & 49 G111
ONE-PIECE PTFE - - - 50-221 -
POLYESTER - - - 1B029 -
DELRIN - 1B065 - - -
POLYURETHANE - - - 1B048 -
ST. STEEL 50-292 1B109 - - -
SANTOPRENE - - - 50-233 -
DESCRIPTION
ALUMINIUM 50-293 - - - -
- These items are available in a recommended spares kit. Please refer to your local stockist / distributor for details.
Note! Wet Side Kits only include valve seats if the original parts were rubber :- i.e. Buna-N, Neoprene etc. - These items are available in a recommended spares kit. - ASK5005 - Air side kit. - These items are available as Valve Block Sub-Assy’s - SA10592 & SA10503, all Cast Iron models. Note! These O-Rings are only used with metallic seats and blanking discs, items 14 & 16
#NOTE! Pumps trimmed with EPDM, Viton or PTFE fluid diaphragms are fitted with Neoprene air side diaphragm (1B001)
1
2
2
1
1
2
2
1
1
1
4
1
2
2
1
1
1
1
3
2
16
4/2
1
16
24
24
8
1
1
4
2
2
1
6
16
16
2
SUCTION MANIFOLD - BSP
SUCTION MANIFOLD - NPT
50-259
DISCHARGE MANIFOLD - NPT
50-260 DISCHARGE MANIFOLD - BSP
BLANKING DISC
50-265
ALUMINIUMCAST IRON
PARTS LIST
PART NUMBER DESCRIPTION QTY
HG-CF-1109 Rev. D – 03.11.11
1 50-254
No.
REF
50-274
2 SEE TABLE VALVE SEAT - ELASTOMER
3 SEE TABLE VALVE BALL
4 50-253 50-258 OUTER COVER
5 SA10042 SA10043 FRONTPLATE ASSEMBLY
6 1B015 BUMP STOP
7 1B021 BACKPLATE
8 SEE TABLE DIAPHRAGM - FLUID SIDE
9 1B156 1B157 INNER COVER - TAPPED
10 50-255
11 D028 SOCKET CAP SCREW M8 x 25
12 C165 SPRING WASHER
13 1B026 1B073 INNER COVER
14 SEE TABLE VALVE SEAT - METALLI C
15 SEE TABLE O-RING, (SEE NOTE )
16 1B148 1B152
17 50-294 50-298 OUTER COVER - AIR SIDE
18 1B001 DIAPHRAGM - AIR SIDE
19 SA10042 FRONTPLATE - AIR SIDE
20 SP165 HOSE ASSEMBLY
21 D5027 DOWTY WASHER
22 SP172 HEX. ADAPTOR
23 SP166 ELBOW FITTING
24 A063 BOLT M10 x 40
25 C026 WASHER M10
26 B027 NUT M10
27 A041 BOLT M8 x 30
28 C013 WASHER M8
29 A496 BOLT M10 x 100
30 1B114 SILENCER
31 SA10041 DIAPHRAGM SHAFT ASSEMBLY
32 G091 O-RING
33 50-315 DIAPHRAGM SHAFT BUSH
34 G112 O-RING
35 50-257 1B129 VALVE CHEST
36 50-207 DIAPHRAGM SHAFT LIP SEAL
37 - G205 O-RING (ALL C.IRON ONLY)
Page 8
Page 9
Outer Seal - Lips face outwards. Inner Seals - Lips face in
towards groove with holes.
36
Sectional General Assembly :- B50 05 Metallic Pump
33
Refer to page 8 Parts List table for Item Ref. Nos.
Orientation of Lip Seals in Bushes.
HG-CF-1109 Rev. D – 03.11.11
Page 9
Page 10
IDEX Pump Technologies (Ireland) Ltd.,
A Unit of IDEX Corporation,
R79, Shannon, Co Clare,
IRELAND.
TEL. : +353 61 471933
FAX. : +353 61 475046
Web Site : www.blagdonpump.com
E-Mail : sales@blagdonpump.com
HG-CF-1109 Rev. D – 03.11.11
Date : December 01 2009
Des Monaghan,
Production & Technical Manager
HG-CF-223 (REV 5)
Page 10
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