background image

pb025nmdl4sm-rev1119

sandpiperpump

.

com

Model PB¼ Non-Metallic • 

11

Troubleshooting Guide

Symptom:

Potential Cause(s):

Recommendation(s):

Pump Cycles Once

Deadhead (system pressure meets or exceeds air 

supply pressure).

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow. 

(Does not apply to high pressure 2:1 units).

Air valve or intermediate gaskets installed incorrectly. Install gaskets with holes properly aligned.
Bent or missing actuator plunger.

Remove pilot valve and inspect actuator plungers.

Pump Will Not Operate 

/ Cycle

Pump is over lubricated.

Set lubricator on lowest possible setting or remove. Units are designed for lube free operation.

Lack of air (line size, PSI, CFM).

Check the air line size and length, compressor capacity (HP vs. CFM required).

Check air distribution system.

Disassemble and inspect main air distribution valve, pilot valve and pilot valve actuators. 

Discharge line is blocked or clogged manifolds.

Check for inadvertently closed discharge line valves. Clean discharge manifolds/piping.

Deadhead (system pressure meets or exceeds air 

supply pressure).

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow. 

(Does not apply to high pressure 2:1 units).

Blocked air exhaust muffler.

Remove muffler screen, clean or de-ice, and re-install. 

Pumped fluid in air exhaust muffler.

Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly. 

Pump chamber is blocked.

Disassemble and inspect wetted chambers. Remove or flush any obstructions. 

Pump Cycles and Will 

Not Prime or No Flow

Cavitation on suction side.

Check suction condition (move pump closer to product).

Check valve obstructed. Valve ball(s) not seating 

properly or sticking.

Disassemble the wet end of the pump and manually dislodge obstruction in the check valve pocket. 

Clean out around valve ball cage and valve seat area. Replace valve ball or valve seat if damaged.

Use heavier valve ball material.

Valve ball(s) missing (pushed into chamber or 

manifold).

Worn valve ball or valve seat. Worn fingers in valve ball cage (replace part). Check Chemical 

Resistance Guide for compatibility.

Valve ball(s)/seat(s) damaged or attacked by product. Check Chemical Resistance Guide for compatibility.
Check valve and/or seat is worn or needs adjusting.

Inspect check valves and seats for wear and proper setting. Replace if necessary. 

Suction line is blocked.

Remove or flush obstruction. Check and clear all suction screens or strainers.

Excessive suction lift.

For lifts exceeding 20’ of liquid, filling the chambers with liquid will prime the pump in most cases.

Suction side air leakage or air in product.

Visually inspect all suction-side gaskets and pipe connections.

Pumped fluid in air exhaust muffler.

Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly. 

Pump Cycles Running 

Sluggish/Stalling,

Flow Unsatisfactory

Over lubrication.

Set lubricator on lowest possible setting or remove. Units are designed for lube free operation.

Icing.

Remove muffler screen, de-ice, and re-install. Install a point of use air drier. 

Clogged manifolds.

Clean manifolds to allow proper air flow

Deadhead (system pressure meets or exceeds air 

supply pressure).

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero flow. 

(Does not apply to high pressure 2:1 units).

Cavitation on suction side.

Check suction (move pump closer to product).

Lack of air (line size, PSI, CFM).

Check the air line size, length, compressor capacity.

Excessive suction lift.

For lifts exceeding 20’ of liquid, filling the chambers with liquid will prime the pump in most cases.

Air supply pressure or volume exceeds system hd.

Decrease inlet air (press. and vol.) to the pump. Pump is cavitating the fluid by fast cycling. 

Undersized suction line.

Meet or exceed pump connections. 

Restrictive or undersized air line.

Install a larger air line and connection. 

Suction side air leakage or air in product.

Visually inspect all suction-side gaskets and pipe connections.

Suction line is blocked.

Remove or flush obstruction. Check and clear all suction screens or strainers.

Pumped fluid in air exhaust muffler.

Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly. 

Check valve obstructed.

Disassemble the wet end of the pump and manually dislodge obstruction in the check valve pocket. 

Check valve and/or seat is worn or needs adjusting.

Inspect check valves and seats for wear and proper setting. Replace if necessary.

Entrained air or vapor lock in chamber(s).

Purge chambers through tapped chamber vent plugs. Purging the chambers of air can be dangerous. 

Product Leaking 

Through Exhaust

Diaphragm failure, or diaphragm plates loose.

Replace diaphragms, check for damage and ensure diaphragm plates are tight.

Diaphragm stretched around center hole or bolt holes. Check for excessive inlet pressure or air pressure. Consult Chemical Resistance Chart for compatibility 

with products, cleaners, temperature limitations and lubrication.

Premature Diaphragm 

Failure

Cavitation.

Enlarge pipe diameter on suction side of pump.

Excessive flooded suction pressure.

Move pump closer to product. Raise pump/place pump on top of tank to reduce inlet pressure.

Install Back pressure device (Tech bulletin 41r). Add accumulation tank or pulsation dampener.

Misapplication (chemical/physical incompatibility).

Consult Chemical Resistance Chart for compatibility with products, cleaners, temperature limitations 

and lubrication.

Incorrect diaphragm plates or plates on backwards, 

installed incorrectly or worn.

Check Operating Manual to check for correct part and installation. Ensure outer plates have not been 

worn to a sharp edge.

Unbalanced Cycling 

Excessive suction lift.

For lifts exceeding 20’ of liquid, filling the chambers with liquid will prime the pump in most cases.

Undersized suction line.

Meet or exceed pump connections.

Pumped fluid in air exhaust muffler.

Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly.

Suction side air leakage or air in product.

Visually inspect all suction-side gaskets and pipe connections.

Check valve obstructed.

Disassemble the wet end of the pump and manually dislodge obstruction in the check valve pocket. 

Check valve and/or seat is worn or needs adjusting.

Inspect check valves and seats for wear and proper setting. Replace if necessary. 

Entrained air or vapor lock in chamber(s).

Purge chambers through tapped chamber vent plugs. 

031.107.551 

Main Air Valve Body Assembly

031.107.503 

Main Air Valve Body Assembly (Conductive Acetal only)

031.101.000 

Pilot Valve Assembly

475.145.000 

Air Exhaust Conversion Kit

476.388.354 

Wetted End Kit Santoprene Diaphragms & Balls 

476.388.356 

Wetted End Kit Hytrel Diaphragms & Balls

476.388.600 

Wetted End Kit PTFE Diaphragms & Balls

476.388.644 

Wetted End Kit Santoprene Diaphragms & PTFE Balls

476.129.000 

  Air End Kit

1.2

1.1

1.1

1.4

1.4

1.3

1.5

6

28

4

11

1.4

26

3

20

13

23

17

28

5

15

3.1

3.2

22

19

9

10

21

27.1

27

20

23

14

24

25

24

2

16

7

16

24

25

24

2

26.1

1.3

1.5

19

18

9

8

8

12

12

8.1

8.2

18

Composite Repair Parts Drawing

Service & Repair Kits

3: EXP

 VIEW

Summary of Contents for Sandpiper PB 1/4

Page 1: ...n Rupp Inc A Unit of IDEX Corporation 800 N Main St Mansfield Ohio 44902 USA Telephone 419 524 8388 Fax 419 522 7867 SANDPIPERPUMP COM Copyright 2019 Warren Rupp Inc All rights reserved 1 PUMP SPECS 2...

Page 2: ...mperature range is as specified in tables 1 to 3 on the next page per Annex I of DEKRA 18ATEX0094X 2 ATEX compliant pumps are suitable for use in explosive atmospheres when the equipment is properly g...

Page 3: ...X 20 C to 50 C 20 C to 100 C T5 T100 X Ambient Temperature Range C Process Temperature Range C 20 C to 60 C 20 C to 150 C 1 Per CSA standards ANSI LC6 2018 US Canadian Technical Letter R14 G Series Na...

Page 4: ...W 11 Composite Drawings Parts List Materials Code SECTION 4 AIR END 14 Air Distribution Valve Assembly Pilot Valve Solenoid Shifted Option Drawing Solenoid Shifted Air Distribution Valve Option SECTIO...

Page 5: ...oil E1 Integral Solenoid 24VDC Explosion Proof Coil E2 Integral Solenoid 24VAC 12VDC Coil E3 Integral Solenoid 12VDC Explosion Proof Coil E4 Integral Solenoid 110VAC Coil E5 Integral Solenoid 110VAC E...

Page 6: ...izing agents 180 F 82 C 32 F 0 C PVDF Polyvinylidene Fluoride A durable fluoroplastic with excellent chemical resistance Excellent for UV applications High tensile strength and impact resistance 250 F...

Page 7: ...olerance 125 3mm 4X 32 8 2 44 62 5 25 133 4X 19 5 7 90 201 6 65 169 4 00 102 7 52 191 OPTIONAL DISCHARGE PORT 1 4 FNPT PLUGGED OPTIONAL SUCTION PORT 1 4 FNPT PLUGGED AIR INLET PORT 1 4 FNPT 3 52 89 3...

Page 8: ...side check valve and into the outer fluid chamber Suction side stroking also initiates the reciprocating shifting stroking or cycling action of the pump The suction diaphragm s movement is mechanicall...

Page 9: ...p operating Water in the air supply can be reduced by using a point of use air dryer Air Inlet And Priming To start the pump slightly open the air shut off valve After the pump primes the air valve ca...

Page 10: ...or exceeds air supply pressure Increase the inlet air pressure to the pump Pump is designed for 1 1 pressure ratio at zero flow Does not apply to high pressure 2 1 units Cavitation on suction side Che...

Page 11: ...End Kit Santoprene Diaphragms Balls 476 388 356 Wetted End Kit Hytrel Diaphragms Balls 476 388 600 Wetted End Kit PTFE Diaphragms Balls 476 388 644 Wetted End Kit Santoprene Diaphragms PTFE Balls 476...

Page 12: ...ytrel 4 286 070 600 Diaphragm PTFE 4 10 360 084 360 Gasket Intermediate 1 11 360 085 360 Gasket Valve Body 1 12 360 086 360 Gasket Spacer 2 13 518 210 552 Manifold Discharge Polypropylene Includes Plu...

Page 13: ...8 Cork and Neoprene 425 Compressed Fibre 426 Blue Gard 440 Vegetable Fibre 500 Delrin 500 502 Conductive Acetal ESD 800 503 Conductive Acetal Glass Filled 506 Delrin 150 520 Injection Molded PVDF Natu...

Page 14: ...ate O Rings 26 1 and 27 1 Reassemble in reverse order Main Air Valve Assembly Parts List Item Part Number Description Qty 1 031 107 551 Valve Main Air 1 1 1 031 106 000 Sleeve and Spool Set Includes O...

Page 15: ...r Description Qty 29 675 047 115 Ring Retaining Pilot Plug Sleeve 2 41 755 037 000 Pilot Plug Sleeve with O rings 1 42 360 106 360 Gasket Intermediate Bracket 1 43 241 001 000 Connector conduit 1 44 8...

Page 16: ...cle the pump s air distribution valve an electric solenoid is utilized As the solenoid is powered one of the pump s air chambers is pressurized while the other chamber is exhausted When electric power...

Page 17: ...by prying them out with a small flat screwdriver Step 2 After removing the inserts take the K R rod seals out of the inserts and replace Step 3 When reinstalling the seals make sure the open side of...

Page 18: ...nized Standard EN809 2012 Pumps and Pump Units for Liquids Common Safety Requirements to verify conformance 5 YEAR Limited Product Warranty Warren Rupp Inc Warren Rupp warrants to the original end use...

Page 19: ...ies MSA Series U Series F Series T Series EH Series SH Series GH Series Conductive plastic pump models with integral muffler S Series PB Series Tranquilizer surge suppressors Hazardous Location Applie...

Reviews: