Sandpiper ST1, ST25 Service & Operating Manual

SERVICE & OPERATING MANUAL

Original Instructions

Certied Quality

Model ST1 & ST25

Containment Duty
Design Level 5

ISO 9001 Certied

ISO 14001 Certied

1: PUMP SPECS2: INSTAL & OP3: EXP VIEW4: AIR END5: WARRANTY

Warren Rupp, Inc.

A Unit of IDEX Corporation

800 N. Main St.,

Manseld, Ohio 44902 USA

Telephone [phone]

Fax [phone]

WWW.SANDPIPERPUMP.COM

©2017 Warren Rupp, Inc.

ww w. sa nd pi pe rp um p. co m

Safety Information

IMPORTANT

Read the safety warnings and instructions in this manual
before pump installation and start-up. Failure to comply with
the recommendations stated in this manual could damage the
pump and void factory warranty.

When the pump is used for materials that tend to settle out

or solidify, the pump should be ushed after each use to

prevent damage. In freezing temperatures the pump should be
completely drained between uses.

CAUTION

Before pump operation, inspect all fasteners for loosening

caused by gasket creep. Retighten loose fasteners to prevent
leakage. Follow recommended torques stated in this manual.

Nonmetallic pumps and plastic components are not UV
stabilized. Ultraviolet radiation can damage these parts and
negatively affect material properties. Do not expose to UV light
for extended periods of time.

WARNING
Pump not designed, tested or certied to be powered by
compressed natural gas. Powering the pump with natural
gas will void the warranty.

WARNING

When used for toxic or aggressive uids, the pump should
always be ushed clean prior to disassembly.

Before maintenance or repair, shut off the compressed air line,
bleed the pressure, and disconnect the air line from the pump.

Be certain that approved eye protection and protective clothing
are worn at all times. Failure to follow these recommendations
may result in serious injury or death.

Airborne particles and loud noise hazards. Wear eye and ear
protection.

In the event of diaphragm rupture, pumped material may enter
the air end of the pump, and be discharged into the atmosphere.
If pumping a product that is hazardous or toxic, the air exhaust

must be piped to an appropriate area for safe containment.

Take action to prevent static sparking. Fire or explosion can

result, especially when handling ammable liquids. The pump,
piping, valves, containers and other miscellaneous equipment

must be properly grounded.

This pump is pressurized internally with air pressure during
operation. Make certain that all fasteners are in good condition
and are reinstalled properly during reassembly.

WARNING
The use of non-OEM replacement parts will void (or negate)

agency certications, including CE, ATEX, CSA, 3A and EC1935
compliance (Food Contact Materials). Warren Rupp, Inc. cannot

ensure nor warrant non-OEM parts to meet the stringent
requirements of the certifying agencies.

Grounding ATEX Pumps

ATEX compliant pumps are suitable for use in explosive atmospheres when the equipment is properly grounded
in accordance with local electrical codes. Pumps equipped with electrically conductive diaphragms are suitable for

the transfer of conductive or non-conductive uids of any explosion group. When operating pumps equipped with
non-conductive diaphragms that exceed the maximum permissible projected area, as dened in EN 13463-1: 2009
section 6.7.5 table 9, the following protection methods must be applied:

• Equipment is always used to transfer electrically conductive uids or

• Explosive environment is prevented from entering the internal portions of the pump, i.e. dry running

For further guidance on ATEX applications, please consult the factory.

kg

Use safe practices when lifting

Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Table of Contents

SECTION 1: PUMP SPECIFICATIONS ................1

• Explanation of Nomenclature

• Performance

• Materials

• Dimensional Drawings

SECTION 2: INSTALLATION & OPERATION ......4

• Principle of Pump Operation

• Recommended Installation Guide

• Filling the Driver Chambers with Fluid

• Troubleshooting Guide

SECTION 3: EXPLODED VIEW ...........................7

• Composite Repair Parts Drawing

• Composite Repair Parts List

• Material Codes

1: PUMP SPECS2: INSTAL & OP3: EXP VIEW4: AIR END5: WARRANTY

SECTION 4: AIR END .......................................11

• Air Distribution Valve Assembly

• Pilot Valve Assembly

SECTION 7: WARRANTY & CERTIFICATES ....13

• Warranty

• CE Declaration of Conformity - Directive 2006/42/EC Machinery

• ATEX Declaration of Conformity - Directive 94/9/EC

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Model ST1/ST25

Explanation of Pump Nomenclature

II 2GD T5

Your Model #:

__ __ _____ __ ___ __ __

(ll in from pump
nameplate)

Pump Pump Pump Size Manifold Diaphragm/ Design

1: PUMP SPECS

Series Design and Options Porting

Model #:

XX X XXXXXX, XX XXX X XX

Pump Series

S SANDPIPER

Pump Design

T Spill Containment

Pump Size & Options

1 1" NPT
25 1" BSP Tapered

Options

VL Visual Leak Detection Sight Tubes

Manifold Porting Position

S Side

®

Diaphragm Check Valve Materials

NG Neoprene Driver Diaphragms, PTFE
Pumping Diaphragms and PTFE Check Balls
VG FKM Driver Diaphragms / PTFE
Pumping Diaphragms and PTFE Check Balls
GNG Neoprene Backup Diaphragms with PTFE
Overlay Pumping Diaphragms / PTFE
Pumping Diaphragms and PTFE Check Balls

Valve

Level

Your Serial #: (ll in from pump nameplate) _____________________________________

ATEX Detail

All Pump Models:

Construction

Design Level

5

Construction

A Aluminum Wetted, Aluminum Air
SS Stainless Steel Wetted, Aluminum Air
HC Alloy-C Wetted, Aluminum Air

(1)

II 2 G c IIB T5
II 2D c T100°C

1 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Performance

ST1 & ST25 Containment Duty

SUCTION/DISCHARGE PORT SIZE

• ST1: 1” NPT (internal)

• ST25: 1” BSP Tapered (internal)

CAPACITY

• 0 to 42 gallons per minute
(0 to 159 liters per minute)

AIR DISTRIBUTION VALVE

• No-lube, no-stall design

SOLIDS-HANDLING

• Occational solids only,

to nearly .25” (6.3mm)

HEADS UP TO

• 125 psi or 289 ft. of water
(8.8 Kg/cm

MAXIMUM OPERATING PRESSURE

• 125 psi (8.6 bar)

DISPLACEMENT/STROKE

• .09 Gallon / .34 liter

SHIPPING WEIGHT

• Aluminum 46 lbs. (20kg)

• Stainless Steel 67 lbs. (30kg)

2

or 88 meters)

BAR

7

100

6

5

4

HEAD

3

2

1

0

90

80

70

60

50

40

AIR CONSUMPTION

PSI

100 PSI

80 PSI

60 PSI

40 PSI

SCFM (M

10(17)

3

/hr)

15(25.4)

20(34)

MODEL ST1/ST25 Performance Curve

Performance based on the following: elastomer fitted pump, flooded suction,

water at ambient conditions. The use of other materials and varying hydraulic

25(42.5)

30(51)

conditions may result in deviations in excess of 5%.

35(59.5)

40(68)

45(76.5)

50(85)

30

20

20 PSI Air Inlet Pressure

10

0

0

4 8

12 16

20

24

28 32

36

US Gallons per minute

0 20 40 60 80 100 120 140 150

Liters per minute

CAPACITY

1: PUMP SPECS

40

Materials

Material Prole:

CAUTION! Operating temperature limitations are as follows:

Conductive Acetal: Tough, impact resistant, ductile. Good
abrasion resistance and low friction surface. Generally inert, with
good chemical resistance except for strong acids and oxidizing
agents.

EPDM: Shows very good water and chemical resistance. Has

poor resistance to oils and solvents, but is fair in ketones and

alcohols.

FKM: (Fluorocarbon) Shows good resistance to a wide range
of oils and solvents; especially all aliphatic, aromatic and
halogenated hydrocarbons, acids, animal and vegetable oils.

Hot water or hot aqueous solutions (over 70°F(21°C)) will
attack FKM.

Hytrel®: Good on acids, bases, amines and glycols at room
temperatures only.

Neoprene: All purpose. Resistance to vegetable oils. Generally
not affected by moderate chemicals, fats, greases and many

oils and solvents. Generally attacked by strong oxidizing acids,
ketones, esters and nitro hydrocarbons and chlorinated aromatic

hydrocarbons.

Nitrile: General purpose, oil-resistant. Shows good solvent, oil,

water and hydraulic uid resistance. Should not be used with
highly polar solvents like acetone and MEK, ozone, chlorinated

hydrocarbons and nitro hydrocarbons.

Nylon: 6/6 High strength and toughness over a wide
temperature range. Moderate to good resistance to fuels, oils
and chemicals.

Ambient temperature range: -20°C to +40°C
Process temperature range: -20°C to +80°C for models rated as category 1 equipment

-20°C to +100°C for models rated as category 2 equipment

In addition, the ambient temperature range and the process temperature range do not exceed the operating temperature range of the applied non-metallic parts as listed in the manuals of the pumps.

Operating

Temperatures:

Max. Min.

190°F

88°C

280°F
138°C

350°F
177°C

220°F
104°C

200°F

93°C

190°F

88°C

180°F

82°C

-20°F

-29°C

-40°F

-40°C

-40°F

-40°C

-20°F

-29°C

-10°F

-23°C

-10°F

-23°C

32°F

0°C

Polypropylene: A thermoplastic polymer. Moderate tensile

and ex strength. Resists stong acids and alkali. Attacked by

chlorine, fuming nitric acid and other strong oxidizing agents.

PVDF: (Polyvinylidene Fluoride) A durable uoroplastic with

excellent chemical resistance. Excellent for UV applications.
High tensile strength and impact resistance.

Santoprene®: Injection molded thermoplastic elastomer with

no fabric layer. Long mechanical ex life. Excellent abrasion

resistance.

UHMW PE: A thermoplastic that is highly resistant to a broad
range of chemicals. Exhibits outstanding abrasion and impact

resistance, along with environmental stress-cracking resistance.

Urethane: Shows good resistance to abrasives. Has poor
resistance to most solvents and oils.

Virgin PTFE: (PFA/TFE) Chemically inert, virtually impervious.
Very few chemicals are known to chemically react with PTFE;
molten alkali metals, turbulent liquid or gaseous uorine and
a few uoro-chemicals such as chlorine triuoride or oxygen
diuoride which readily liberate free uorine at elevated

temperatures.

Maximum and Minimum Temperatures are the limits for which these materials can be operated.
Temperatures coupled with pressure affect the longevity of diaphragm pump components.
Maximum life should not be expected at the extreme limits of the temperature ranges.

Metals:

Alloy C: Equal to ASTM494 CW-12M-1 specication for nickel and nickel alloy.

Stainless Steel: Equal to or exceeding ASTM specication A743 CF-8M for corrosion

resistant iron chromium, iron chromium nickel and nickel based alloy castings for
general applications. Commonly referred to as 316 Stainless Steel in the pump industry.

For specic applications, always consult the Chemical Resistance Chart.

180°F

82°C

250°F
121°C

275°F
135°C

180°F

82°C

150°F

66°C

220°F
104°C

32°F

0°C

0°F

-18°C

-40°F

-40°C

-35°F

-37°C

32°F

0°C

-35°F

-37°C

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Model ST1/ST25 • 2

Dimensional Drawings

ST1 & ST25 Containment Duty

Dimensions are ±1/8". Figures in parentheses = millimeters.

1: PUMP SPECS

14.26
362

8.57
218

DISCHARGE PORT
1" NPT (ST1)
1" BSPT (ST25)

15.50
394

12.52
318

4.61
117

SUCTION PORT
1" NPT (ST1)
1" BSPT (ST25)

14.60

8.82
224

7.12

4.10

181

371

5.54
141

104

6.89
175

9.00
229

8.56
217

9.75
248

.287 MOUNTING HOLE

4X

NOTE:
UNIT FURNISHED WITH SUB-BASE PLATE
AND RUBBER FEET AS STANDARD FOR
STATIONARY BOLT DOWN USE, RUBBER
FEET CAN BE REMOVED

.7218

9.00
229

10.19

259

8.56
217

3 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Principle of Pump Operation

SAFE AIR
EXHAUST
DISPOSAL
AREA

MUFFLER

Air-Operated Double Diaphragm (AODD) pumps are powered

by compressed air or nitrogen.

Discharge

Stroke

Air Line

Discharged

Fluid

Suction

Stroke

The main directional (air) control valve

compressed air to an air chamber, exerting uniform pressure
over the inner surface of the diaphragm
the exhausting air
is directed through the air valve assembly(s) to an exhaust
port

.

④

As inner chamber pressure
pressure
together creating discharge on one side and suction on the
opposite side. The discharged and primed liquid’s directions

are controlled by the check valves (ball or ap)

The pump primes as a result of the suction stroke. The
suction stroke lowers the chamber pressure

the chamber volume. This results in a pressure differential
necessary for atmospheric pressure

through the suction piping and across the suction side check
valve and into the outer uid chamber

Suction (side) stroking also initiates the reciprocating
(shifting, stroking or cycling) action of the pump. The suction

diaphragm’s movement is mechanically pulled through its

stroke. The diaphragm’s inner plate makes contact with an

actuator plunger aligned to shift the pilot signaling valve.
Once actuated, the pilot valve sends a pressure signal to the
opposite end of the main directional air valve, redirecting the
compressed air to the opposite inner chamber.

(P2), the rod

from behind the opposite diaphragm

③

(P1) exceeds liquid chamber

connected diaphragms shift

⑤

distributes

①

. At the same time,

②

orientation.

⑥

(P3) increasing

(P4) to push the uid

.

zz

2: INSTAL & OP

Primed

Fluid

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

SUBMERGED ILLUSTRATION

MUFFLER

LIQUID
LEVEL

SUCTION

LINE

Pump can be submerged if the pump materials of construction
are compatible with the liquid being pumped. The air exhaust

must be piped above the liquid level. When the pumped product
source is at a higher level than the pump (ooded suction
condition), pipe the exhaust higher than the product source to

prevent siphoning spills.

1" DIAMETER AIR
EXHAUST PIPING

Model ST1/ST25 • 4

Recommended Installation Guide

Available Accessories:

1. Surge Suppressor

2. Filter/Regulator

3. Air Dryer

Unregulated Air

Supply to Surge

Suppressor

1

Surge Suppressor

Pressure Gauge

Shut-Off Valve

2: INSTAL & OP

Note: Surge Suppressor and
Piping must be supported after

the exible connection

(Optional Piped Exhaust)

Flexible Connector

Vacuum

Gauge

Suction

Shut-Off Valve

Drain Port

Muffler

Pipe Connection

(Style Optional)

Flexible Connector

Drain Port

Discharge

Check
Valve

Shut-Off
Valve

2

Air Inlet

3

Filter Regulator

Air Dryer

CAUTION

The air exhaust should
be piped to an area
for safe disposition
of the product being

pumped, in the event of

a diaphragm failure.

Installation And Start-Up

Locate the pump as close to the product being pumped as possible. Keep the suction line length and number of ttings to a minimum. Do not reduce the suction line

diameter.

Air Supply

Connect the pump air inlet to an air supply with sufcient capacity and pressure to achieve desired performance. A pressure regulating valve should be installed to

insure air supply pressure does not exceed recommended limits.

Air Valve Lubrication

The air distribution system is designed to operate WITHOUT lubrication. This is the standard mode of operation. If lubrication is desired, install an air line lubricator
set to deliver one drop of SAE 10 non-detergent oil for every 20 SCFM (9.4 liters/sec.) of air the pump consumes. Consult the Performance Curve to determine air

consumption.

Air Line Moisture

Water in the compressed air supply may cause icing or freezing of the exhaust air, causing the pump to cycle erratically or stop 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 can be opened to increase air ow as desired. If opening the valve
increases cycling rate, but does not increase the rate of ow, cavitation has occurred. The valve should be closed slightly to obtain the most efcient air ow to pump
ow ratio.

5 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

THE DRIVER CHAMBERS WILL BE
FILLED WITH DISTILLED WATER AT
THE FACTORY.

If you need to substitute another liquid to prevent

system contamination, rst consult the factory for

chemical compatibility with pump construction.

Follow the steps listed below to replace the liquid
in the pump after disassembly or liquid loss:

Step 1. Filling is accomplished through the
pipe plugs at the top of the liquid chamber. Drain
ports are at the bottom of the liquid chamber.

Step 2. After the driver fluid has been
emptied from the pump, the driver
diaphragms will naturally come to center.

Step 3. Remove the entire manifold assembly
exposing the ports in the outer diaphragm
chambers.

Step 4. For pumps not equipped with Visual

Leak Detection sight tubes, ll with 722ml/ 24.6
. oz.

Step 6. When the driver uid rises to the top
of the ll plug hole, apply pipe dope to the pipe

plug, and thread it into the chamber plug hole.

(Do not use PTFE tape.) Keep pressure on the

PTFE diaphragm until the pipe plug is tight to
prevent air from drawing

back into the chamber.

Step 7. Repeat the filling procedure for
opposite side.

2: INSTAL & OP

For pumps equipped with Visual Leak Detection
sight tubes, ll with 752ml/ 25.4 . oz.

It is imperative that the driver liquid chambers

be lled with the correct amount of driver liquid

as too little or too much will cause premature
diaphragm failure and erratic pumping.

Step 5. After lling with the proper amount of

liquid, if the liquid does not come to the top of

the ll hole, pressure should be applied to the

PTFE diaphragm with a blunt tool through the

material ow port in the outer chamber until the

liquid comes to the top. If the main air valve body
and pilot valve are removed, the diaphragm rod

will be visible in the intermediate bracket. The

hole in the diaphragm rod will assist manual
movement. Use a long taper punch to move the
diaphragm rod.

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Model ST1/ST25 • 6

Troubleshooting Guide

Symptom: Potential Cause(s): Recommendation(s):

Pump Cycles Once

Pump Will Not Operate
/ Cycle

Pump Cycles and Will

2: INSTAL & OP

Not Prime or No Flow

Pump Cycles Running
Sluggish / Stalling,
Flow Unsatisfactory

Product Leaking
Through Exhaust

Premature Diaphragm
Failure

Unbalanced Cycling

Deadhead (system pressure meets or exceeds air
supply pressure).

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 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).

Blocked air exhaust mufer. Remove mufer screen, clean or de-ice, and re-install.

Pumped uid in air exhaust mufer. Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly.

Pump chamber is blocked. Disassemble and inspect wetted chambers. Remove or ush any obstructions.

Cavitation on suction side. Check suction condition (move pump closer to product).

Check valve obstructed. Valve ball(s) not seating
properly or sticking.

Valve ball(s) missing (pushed into chamber or
manifold).

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 ush obstruction. Check and clear all suction screens or strainers.

Excessive suction lift. For lifts exceeding 20’ of liquid, lling 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 uid in air exhaust mufer. Disassemble pump chambers. Inspect for diaphragm rupture or loose diaphragm plate assembly.

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

Icing. Remove mufer screen, de-ice, and re-install. Install a point of use air drier.

Clogged manifolds. Clean manifolds to allow proper air ow.

Deadhead (system pressure meets or exceeds air
supply pressure).

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, lling 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 uid 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 ush obstruction. Check and clear all suction screens or strainers.

Pumped uid in air exhaust mufer. 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.

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

Cavitation. Enlarge pipe diameter on suction side of pump.

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

Misapplication (chemical/physical incompatibility). Consult Chemical Resistance Chart for compatibility with products, cleaners, temperature limitations

Incorrect diaphragm plates or plates on backwards,

installed incorrectly or worn.

Excessive suction lift. For lifts exceeding 20’ of liquid, lling the chambers with liquid will prime the pump in most cases.

Undersized suction line. Meet or exceed pump connections.

Pumped uid in air exhaust mufer. 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.

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero ow.
(Does not apply to high pressure 2:1 units).

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero ow.
(Does not apply to high pressure 2:1 units).

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.

Worn valve ball or valve seat. Worn ngers in valve ball cage (replace part). Check Chemical
Resistance Guide for compatibility.

Increase the inlet air pressure to the pump. Pump is designed for 1:1 pressure ratio at zero ow.
(Does not apply to high pressure 2:1 units).

with products, cleaners, temperature limitations and lubrication.

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

and lubrication.

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

worn to a sharp edge.

For additional troubleshooting tips contact After Sales Support at [e-mail] or 419-524-8388

7 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

14

15

32

37

3

21

59

38

53

61

7

43

23

28

50

9

47

35

1

31

30

49

42

11

6

40

13

62

38

12

62

20

47

5

4

10

60

51

8

48

19

27

52 44

24

18

45

56

38

59

55

41

16

26

63

17

33

54

33

26

59

38

2

PTFE OVERLAY

CONFIGURATION

36

56

58

46

46

36

57

58

22

29

34

23

25

43

Composite Repair Parts Drawing

Note: Usual installation for the outer chamber and

manifold is 180° from the view shown.

3: EXP VIEW

Service & Repair Kits

476.130.000 AIR END KIT

Sleeve and Spool Set, Seals, Gaskets, O-rings,Bumpers,
Plunger Actuators, Plunger Bushings, Retaining Rings, and

Pilot Valve Assembly

476.317.000 AIR END WEAR KIT

Seals, Gaskets, O-rings, Grease Packet Bumpers, Plunger
Actuators, Plunger Bushings and Retaining Rings

IMPORTANT NOTE: Polypropylene pumps are shipped with the 1/2" NPT Pipe Plug installed in the end ports of both suction and discharge one-piece

manifolds. To convert to the Inline porting positions for pump installation and operation, rst remove the pipe plugs and re-install in the center ports.
Apply PTFE tape or pipe sealant to threads of the plug before installation.

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

476.310.365 WET END KIT

Neoprene Driver Diaphragms, PTFE Pumping Diaphragms,
PTFE Check Balls, PTFE Gaskets, Copper Washers, and
Neoprene Diaphragm Gaskets

476.310.637 WET END KIT

FKM Driver Diaphragms, PTFE Pumping Diaphragms,
PTFE Check Balls, PTFE Gaskets, Copper Washers,
and FKM Diaphragm Gaskets

476.310.640 WET END KIT

Neoprene Driver Diaphragms, PTFE Overlay Diaphragms,
PTFE Pumping Diaphragms, PTFE Check Balls, PTFE

Gaskets, Copper Washers, and Neoprene Diaphragm Gaskets

Model ST1/ST25 • 8

Composite Repair Parts List

Item Part Number Description Qty.

1 031.111.557 ASSEMBLY, AIR VALVE 1
2 050.011.600 BALL, CHECK 4
3 070.012.170 BEARING, SLEEVE 2
4 095.074.001 PILOT VALVE ASSEMBLY 1
5 114.007.157 INTERMEDIATE 1
6 115.071.330 BRACKET, MOUNTING 1
7 132.019.360 BUMPER 2
8 132.022.360 BUMPER, ACTUATOR 2
9 135.034.506 BUSHING, PLUNGER 2
10 165.134.157 CAP, AIR INLET, ASS'Y 1

10.1 165.042.157 CAP, AIR INLET 1

10.2 559.017.506 ORIFICE 1
11 170.029.115 CAPSCREW, HEX HD, 5/16-18 X 1.50 16
12 170.043.115 CAPSCREW, HEX HD, 1/4-20 X 1.00 6
13 170.045.115 CAPSCREW, HEX HEAD 5/16-18 X 1 1/4 4
14 170.063.330 CAPSCREW, HEX HD, 1/4-20 X 1.75 1
15 170.033.115 CAPSCREW, HEX HD, 3/8-16 UNC X 3.00 4
16 170.122.115 CAPSCREW, HEX HD, 5/16-18 X 5.00 6
17 171.010.115
18 196.021.110 CHAMBER, OUTER 2
18 196.021.112 CHAMBER, OUTER 2

3: EXP VIEW

19 196.022.156 CHAMBER, CONTAINMENT 2

196.022.110 CHAMBER, CONTAINMENT 2

196.022.112 CHAMBER, CONTAINMENT 2
20 196.042.157 CHAMBER, INNER 1
21 196.043.157 CHAMBER, INNER 1
22 255.012.335 COUPLING, PIPE, 3/4 NPT 1
23 286.008.363 DIAPHRAGM 2

286.008.365 DIAPHRAGM 2
24 286.009.604 DIAPHRAGM, PUMPING 2
25 286.015.604 DIAPHRAGM, OVERLAY 2
26 334.013.110 FLANGE, PORTING 2

334.013.112 FLANGE, PORTING 2

334.013.157 FLANGE, PORTING 2

334.013.110 E FLANGE, PORTING - BSP TAPERED 2

334.013.112 E FLANGE, PORTING - BSP TAPERED 2

334.013.157 E FLANGE, PORTING - BSP TAPERED 2
27 350.002.360 FOOT, RUBBER 4
28 360.030.600 GASKET, MANIFOLD 2
29 360.039.363 GASKET, DIAPHRAGM 2

360.039.365 GASKET, DIAPHRAGM 2
30 360.056.379 GASKET 1
31 360.057.360 GASKET 1
32 360.058.360 GASKET 1
33 360.115.608 GASKET, FLANGE 4

CAPSCREW, FLANGE LOCK, 3/8-16 UNC X 1.75 4

Item Part Number Description Qty.

34 518.020.110 MANIFOLD 1

518.020.112 MANIFOLD 1
35 530.036.000 MUFFLER 1
36 538.083.110 NIPPLE, PIPE, 1/4" NPT, CLOSE 4
37 542.001.115 NUT, SQUARE 1
38 545.004.115 NUT, HEX, 5/16-18 42
40 547.002.110 NUT, STOP 4
41 560.001.360 O-RING 2
42 560.040.360 O-RING 2
43 612.022.330 PLATE, DIAPHRAGM, INNER 2
44 612.101.110 ASSEMBLY, DIAPHRAGM PLATE 2

612.101.112 ASSEMBLY, DIAPHRAGM PLATE 2

612.108.157 ASSEMBLY, DIAPHRAGM PLATE 2
45 618.003.110 PLUG, PIPE, 1/4 4

618.003.112 PLUG, PIPE, 1/4 4
46 618.003.110 PLUG, PIPE, 1/4 4
47 618.003.330 PLUG, PIPE, 1/4 3
48 620.007.114 PLUNGER, ACTUATOR 2
49 675.040.360 RING, SEALING 2
50 675.042.115 RING, RETAINING 2
51 685.039.120 ROD, DIAPHRAGM 1
52 706.013.330 SCREW, MACHINE 4
53 720.010.375 SEAL, U-CUP 2
54 722.102.110 SEAT, CHECK VALVE 2

722.102.112 SEAT, CHECK VALVE 2
55 807.024.115 STUD, 5/16-18 16
56 835.005.110 TEE, PIPE, 1/4 NPT 4
57 860.065.606 TUBE 2
58 866.060.110 CONNECTOR, TUBE 4
59 900.004.115 WASHER, LOCK, 5/16 26
60 901.005.115 WASHER, FLAT, 3/8 4
61 901.012.180 WASHER, SEALING 2
62 901.035.115 WASHER, FLAT, 1/4 7
63 905.001.115 WASHER, TAPER 4

LEGEND:

= Items contained within Air End Kits
= Items contianed within Wet End Kits

Note: Kits contain components specic to the material codes.

9 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Material Codes - The Last 3 Digits of Part Number

000.....Assembly, sub-assembly;

and some purchased items

010.....Cast Iron

015.....Ductile Iron

020.....Ferritic Malleable Iron

080.....Carbon Steel, AISI B-1112

110 .....Alloy Type 316 Stainless Steel

111 ..... Alloy Type 316 Stainless Steel

(Electro Polished)

112 .....Alloy C

113 .....Alloy Type 316 Stainless Steel

(Hand Polished)

114 .....303 Stainless Steel

115 .....302/304 Stainless Steel

117 .....440-C Stainless Steel (Martensitic)

120.....416 Stainless Steel

(Wrought Martensitic)

148.....Hardcoat Anodized Aluminum

150.....6061-T6 Aluminum

152.....2024-T4 Aluminum (2023-T351)

155.....356-T6 Aluminum

156.....356-T6 Aluminum

157.....Die Cast Aluminum Alloy #380

158.....Aluminum Alloy SR-319

162.....Brass, Yellow, Screw Machine Stock

165.....Cast Bronze, 85-5-5-5

166.....Bronze, SAE 660

170.....Bronze, Bearing Type,

Oil Impregnated

180.....Copper Alloy

305.....Carbon Steel, Black Epoxy Coated

306.....Carbon Steel, Black PTFE Coated

307.....Aluminum, Black Epoxy Coated

308.....Stainless Steel, Black PTFE Coated

309.....Aluminum, Black PTFE Coated

313.....Aluminum, White Epoxy Coated

330.....Zinc Plated Steel

332.....Aluminum, Electroless Nickel Plated

333.....Carbon Steel, Electroless

Nickel Plated

335.....Galvanized Steel

337.....Silver Plated Steel

351.....Food Grade Santoprene

®

353.....Geolast; Color: Black

354.....Injection Molded #203-40

Santoprene

®

Duro 40D +/-5;

Color: RED

356.....Hytrel

®

357.....Injection Molded Polyurethane

358.....Urethane Rubber

(Some Applications)
(Compression Mold)

359.....Urethane Rubber

360.....Nitrile Rubber Color coded: RED

363.....FKM (Fluorocarbon)

Color coded: YELLOW

364.....EPDM Rubber

Color coded: BLUE

365.....Neoprene Rubber

Color coded: GREEN

366.....Food Grade Nitrile

368.....Food Grade EPDM

371.....Philthane (Tuftane)

374.....Carboxylated Nitrile

375.....Fluorinated Nitrile

378.....High Density Polypropylene

379.....Conductive Nitrile

408.....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

Natural color

540.....Nylon

542.....Nylon

544.....Nylon Injection Molded

550.....Polyethylene

551.....Glass Filled Polypropylene

552.....Unlled Polypropylene

555.....Polyvinyl Chloride

556.....Black Vinyl

557.....Conductive Carbon-lled Polypropylene

558.....Conductive HDPE

570.....Rulon II

580.....Ryton

®

®

600.....PTFE (virgin material)

Tetrauorocarbon (TFE)

603.....Blue Gylon

®

604.....PTFE

606.....PTFE

607.....Envelon

608.....Conductive PTFE

610.....PTFE Encapsulated Silicon

611 .....PTFE Encapsulated FKM

632.....Neoprene/Hytrel

®

633.....FKM/PTFE

634.....EPDM/PTFE

635.....Neoprene/PTFE

637.....PTFE, FKM/PTFE

638.....PTFE, Hytrel

®

/PTFE

639.....Nitrile/TFE

643.....Santoprene

644.....Santoprene

656 .....Santoprene

®

/EPDM

®

/PTFE

®

Diaphragm and

Check Balls/EPDM Seats

661.....EPDM/Santoprene

®

666.....FDA Nitrile Diaphragm,

PTFE Overlay, Balls, and Seals

668.....PTFE, FDA Santoprene

• Delrin and Hytrel are registered
tradenames of E.I. DuPont.

• Nylatron is a registered tradename
of Polymer Corp.

• Gylon is a registered tradename

of Garlock, Inc.

• Santoprene is a registered tradename
of Exxon Mobil Corp.

• Rulon II is a registered tradename
of Dixion Industries Corp.

• Ryton is a registered tradename
of Phillips Chemical Co.

• Valox is a registered tradename
of General Electric Co.

®

/PTFE

RECYCLING

Many components of SANDPIPER® AODD

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 ushed.

3: EXP VIEW

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Model ST1/ST25 • 10

Air Distribution Valve Assembly

With Cast Iron Center

1G

1E

1F

1C

1D

1B

1H

1C

1A

1A

1D

1C

1F

1E

1G

4: AIR END

Air Distribution Valve Servicing

See repair parts drawing above.

Step 1: Remove end cap retainer (1G).

Step 2: Remove end cap (1E), bumper (1D) and o-rings (1C and 1F).

Step 3: Remove spool part of (1A) (caution, do not scratch).

Step 4: Press sleeve (1A) from body (1B).

Step 5: Inspect O-Ring (1C) and replace if necessary.

Step 6: Lightly lubricate O-Rings (1D) on spool (1A).

Step 7: Press sleeve (1A) into body (1B).

Step 8: Reassemble in reverse order.

Note: Sleeve and spool (1A) set is match ground to a specied clearance

sleeve and spools (1A) cannot be interchanged.

Main Air Valve Assembly Parts List

Item Part Number Description Qty

1 031.111.557 Air Valve Assembly 1

1.A 031.083.000 Sleeve and Spool Set with Pins 1

1.B 095.051.557 Air Valve Body 1

1.C 560.058.360 O-ring 8

1.D 132.028.552 Bumper 2

1.E 165.078.147 End Cap 2

1.F 560.029.360 O-ring 2

1.G 675.043.115 Retaining Ring 2

1.H 210.008.330 Safety Clip 1

LEGEND:

= Items contained within Air End Kits

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.

Waiting for new Drawing / Information

11 • Model ST1/ST25

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Pilot Valve Assembly

4E

4C

4F

4A

4D

Pilot Valve Servicing

With Pilot Valve removed from pump.

Step 1: Remove snap ring (4F).

Step 2: Remove sleeve (4B), inspect O-Rings (4C),

replace if required.

Step 3: Remove spool (4D) from sleeve (4B),

inspect O-Rings (4E), replace if required.

Step 4: Lightly lubricate O-Rings (4C) and (4E).

Reassemble in reverse order.

4B

PILOT VALVE ASSEMBLY PARTS LIST

Item Part Number Description Qty

4 095.074.001 Pilot Valve Assembly 1
4A 095.071.557 Pilot Valve Body 1
4B 755.025.162 Pilot Valve sleeve 1
4C 560.033.360 O-Ring 4
4D 775.014.115 Pilot Valve Spool 1
4E 560.023.360 O-Ring 4
4F 675.037.080 Retaining Ring 1

LEGEND:

= Items contained within Air End Kits

4: AIR END

ww w.san dp ip er pu mp .co m

st1dl5sm-rev0717

Model ST1/ST25 • 12

5 - YEAR Limited Product Warranty

Warren Rupp, Inc. (“Warren Rupp”) warrants to the original end-use purchaser that no product sold by Warren Rupp that

bears a Warren Rupp brand shall fail under normal use and service due to a defect in material or workmanship within five

years from the date of shipment from Warren Rupp’s factory. Warren Rupp brands include Warren Rupp

TM

SANDPIPER Signature Series

, MARATHON®, Porta-Pump®, SludgeMaster™ and Tranquilizer®.

The use of non-OEM replacement parts will void (or negate) agency certifications, including CE, ATEX, CSA, 3A and

EC1935 compliance (Food Contact Materials). Warren Rupp, Inc. cannot ensure nor warrant non-OEM parts to meet the

stringent requirements of the certifying agencies.

~ See sandpiperpump.com/content/warranty-certifications for complete warranty,

including terms and conditions, limitations and exclusions. ~

®

,SANDPIPER®,

5: WARRANTY

Declaration of Conformity

Manufacturer: Warren Rupp, Inc., 800 N. Main Street

Mansfield, Ohio, 44902 USA

Certifies that Air-Operated Double Diaphragm Pump Series: HDB, HDF, M Non-Metallic,

S Non-Metallic, M Metallic, S Metallic, T Series, G Series, U Series, EH and SH High Pressure,

RS Series, W Series, SMA and SPA Submersibles, and Tranquilizer

the European Community Directive 2006/42/EC on Machinery, according to Annex VIII.

This product has used Harmonized Standard EN809:1998+A1:2009, Pumps and Pump Units

for Liquids - Common Safety Requirements, to verify conformance.

Signature of authorized person

Authorised Representative:
IDEX Pump Technologies
R79 Shannon Industrial Estate
Shannon, Co. Clare, Ireland

Attn: Barry McMahon

Revision Level: F

®

Surge Suppressors comply with

October 20, 2005
Date of issue

Director of Engineering
Title

February 27, 2017
Date of revision

EC / EU Declaration of Conformity

The objective of the declaration described is in conformity with the relevant Union harmonisation

legislation: Directive 94/9/EC (until April 19, 2016) and Directive 2014/34/EU (from April 20, 2016).

Manufacturer:

Warren Rupp, Inc.
A Unit of IDEX Corportion
800 North Main Street
P.O. Box 1568
Mansfield, OH 44902 USA

Applicable Standard:

EN13463-1: 2001
EN13463-5: 2003
EN60079-25: 2004

Harmonised Standard:

EN13463-1: 2009
EN13463-5: 2011
EN60079-25:2010

The harmonised standards have been compared to the applicable standards
used for certification purposes and no changes in the state of the art technical
knowledge apply to the listed equipment.

AODD Pumps and Surge Suppressors

Technical File No.: 203104000-1410/MER

AODD (Air-Operated Double Diaphragm) Pumps

EC Type Examination Certificate No. Pumps: KEMA 09ATEX0071 X

DEKRA Certification B.V. (0344)
Meander 1051
6825 MJ Arnhem
The Netherlands

Hazardous Locations Applied:

I M1 c
II 2 G Ex ia c IIC T5
II 2 D Ex c iaD 20 IP67 T100°C
II 2 G Eex m c II T5
II 2 D c IP65 T100°C

II 1 G c T5
II 1 D c T100°C
II 2 G c T5
II 2 D c T100°C
II 2 G c IIB T5

5: WARRANTY

DATE/APPROVAL/TITLE:
18 March 2016

David Roseberry, Director of Engineering