SANDPIPER X50 User Manual

HG-CF-1087 Rev. E – 15.02.10 PAGE 1

SERVICE & OPERATING MANUAL

AIR OPERATED DOUBLE DIAPHRAGM PUMP

B50 & X50

Full Flow

High Pressure Series

This pump is Atex approved for use

in potentially explosive atmospheres

Group II category 2

Table of Contents

Service / Maintenance Log, Recycling 2

Dimensions 3

Performance Curve 3

Technical Data & Temperature limitations 4

Explanation of Pump Nomenclature 4

Principle of Pump Operation 5

Installation guide 5

Important Warnings & Safety Information 6

Troubleshooting 7

Grounding the Pump (Atex) 7

Warranty 8

Service 8

Air Valve Overhaul 8

Wet-side Overhaul 8

Exhaust Safety 9

High Temperature Inst. 9

Parts List 10

Exploded Drawings (Wetside & Airside) 11

Elastomer Table / Technical Notes 12

Technical Notes 13

II 2 GD c

Declaration of Conformity 14

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Service / Maintenance Log

Date Details Completed

RECYCLING

Many components of BLAGDON air operated double diaphragm pumps are made of recyclable materials. We encourage pump
users to recycle worn out parts and pumps whenever possible, after any hazardous pumped fluids are thoroughly flushed.

Contact Information

Contact Phone / Fax No.

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GA Drawing & Performance Curve

B50 / X50 General Assembly :- All dimensions +/- 3mm

B50 & X50 Full Flow 2:1 Pump Performance Curve, based on water at ambient temperature

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TECHNICAL DATA

FLUID CONNECTIONS CAPACITY MAX SOLIDS MAX DISCHARGE HEAD DISPLACEMENT/STROKE

2” BSP (F) 0 - 341 Liters/Minute

(0 - 75 Gallons/Minute)

6 MM
(1/4”)

163 Meters

(536 ft)

1.9 Liters

(0.42 UK Gallons)

MAX. WORKING PRESSURE AIR INLET TEMPERATURE LIMITS PUMP WEIGHTS :-

16 Bar (232 psi) 3/4” BSP (F) Determined by Elastomers AA :- 51.5 Kg

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.

Virgin 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 chemi-

cals, with no known solvent at room temperature.

TYPICAL CODE = B50. 02. A A. W 3. N N S

MODEL

B50 : STANDARD
X50 : ATEX CAT. 2

DESIGN LEVEL

B50. 05. AA. W 3. N N S

Operating Temperatures

Maximum Minimum Optimum

176oF

o

C

80

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

VALVE SEATS

A : ALUMINIUM
S : STAINLESS STEEL

50o to 140oF

o

to 60oC

10

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

WETTED COMPONENTS

A : ALUMINIUM

NON - WETTED COMPONENTS

A : ALUMINIUM

VALVE TYPE

B : BALL
W : WEIGHTED BALL

MODEL DESIGNATION

3 : SERIES 3

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 BALLS

B : BUNA-N T : PTFE
E : EPDM V : VITON
N : NEOPRENE
S : STAINLESS STEEL

DIAPHRAGMS

B : BUNA-N T : PTFE
E : EPDM V : VITON
H : POLYESTER (HYTREL)
N : NEOPRENE
P : POLYURETHANE
R : SANTOPRENE
O : ONE-PIECE PTFE

IMPORTANT

IDEX Pump Technologies (Ireland) Ltd.,
A Unit of IDEX Corporation,
R79, Shannon, Co Clare, IRELAND.
TEL. : [phone] FAX. : [phone]
Web Site : www.blagdonpump.com
E-Mail : [e-mail]

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AIR

Exhaust

1

3

2

4

Flexible

Connection

Pipe Connection
(Style Optional)

Gauge

Shut-off

Valve

Drain Port

DISCHARGE

Pulsation

Dampener

Regulator/Lubricator

Air Shut-Off

Valve

Air Dryer

INLET

Air Inlet

Air Exhaust

Pipe Connection
(Style Optional)

Air

Gauge

Shut-off

Valve

Drain Port

SUCTION

Filter

Connection

Flexible

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 500 feet (152 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

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 for each
chamber, maintaining flow in one direction
through the pump. The 2:1 ratio discharge
pressure is generated by simultaneously
delivering air inlet pressure to alternate sides of
a central air diaphragm, the chambers either side
of this central diaphragm are pressurised and
exhausted in conjunction with the main
diaphragm chambers.

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

CAUTION !

The air exhaust should be piped
to an area for safe disposition of
the product being pumped, in the
event of diaphragm failure.

of or poor priming characteristics. Ensure the
pump is securely mounted to avoid movement
and possible risk of bodily injury.

PRESSURE The pump delivers double the
pressure at the discharge outlet as the air
pressure applied at the air inlet.

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

.

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