Sandpiper ST1 1/2 Parts list manual

w w w .s a n d p i p e r p u m p .c o m
Model ST1½ & ST40
Containment Duty
Design Level 4
Certied Quality
Warren Rupp, Inc.
A Unit of IDEX Corporation
800 N. Main St.,
Manseld, Ohio 44902 USA
Telephone [phone]
Fax [phone]
WWW.SANDPIPERPUMP.COM
©2016 Warren Rupp, Inc.
Quality System
ISO 9001 Certied
Environmental Management System
ISO 14001 Certied
SERVICE & OPERATING MANUAL
Original Instructions
1: PUMP SPECS2: INSTAL & OP3: EXP VIEW4: AIR END5: WARRANTY

www.sandp ipe rpu mp.c om
st15dl4sm-rev0316
Model ST1½/ST40
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 used for toxic or aggressive uids, the pump should
always be ushed clean prior to disassembly.
Airborne particles and loud noise hazards. Wear eye and ear
protection.
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.
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 13461-1: 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.
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.
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.
CAUTION
WARNING
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.
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.
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.
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.
Safety Information
Grounding ATEX Pumps
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.
Use safe practices when lifting
kg
UNIVERSAL ALL AODD

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st15dl4sm-rev0316
Model ST1½/ST40
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 ...........................8
• Composite Repair Parts Drawing
• Composite Repair Parts List
• Material Codes
SECTION 4: AIR END .......................................11
• Air Valve with Stroke Indicator Assembly
• Pilot Valve Assembly
SECTION 5: WARRANTY & CERTIFICATES ....13
• Warranty
• CE Declaration of Conformity - Machinery
• ATEX Declaration of Conformity
MODEL SPECIFIC
1: PUMP SPECS2: INSTAL & OP3: EXP VIEW4: AIR END5: WARRANTY

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1 • Model ST1½/ST40
st15dl4sm-rev0316
ATEX Detail
Explanation of Pump Nomenclature
Diaphragm Check Valve Materials
GI EPDM Driver Diaphragms, PTFE Pumping
Diaphragms, and PTFE Check Balls
NG Neoprene Driver Diaphragms, PTFE Pumping
Diaphragms, and PTFE Check Balls
VG FKM Driver Diaphragms, PTFE Pumping
Diaphragms, and PTFE Check Balls
Design Level
4
Construction
A Aluminum Wetted, Aluminum Air
CI Cast Iron Wetted, Aluminum Air
II Cast Iron Wetted, Cast Iron Air
SI Stainless Steel Wetted, Cast Iron Air
SS Stainless Steel Wetted, Aluminum Air
HC Alloy-C Wetted, Aluminum Air
HI Alloy-C Wetted, Cast Iron Air
Pump Series
SSANDPIPER®
Pump Design
TSpill Containment
Pump Size & Options
1½" NPT
40 1½" BSP Tapered
Options
VL Visual Leak Detection Sight Tubes
Discharge Porting Position
S Side
__ __ _____ __ ___ __ __
Pump Pump Pump Size Discharge Diaphragm/ Design Construction
Series Design and Options Porting Valve Level
XX X XXXXXX, XX XXX X XX
Model #:
(ll in from pump
nameplate)
Your Model #:
HDF1
ATEX Detail Construction Options
HDB1½, ST1½
ATEX Detail Construction Options
HDB2, SB1, SA1
ATEX Detail
Construction Options
II 1G c T5
II 1D c T100°C
I M1 c
I M2 c
SI, HI
II 2G c T5
II 2D c T100°C A, SI, SS, HC, HI
II 2G Ex ia c IIC T5
II 2D Ex c iaD 20 IP67 T100°C A, HC, HI, SI, SS
00
II 2G Ex ia c IIC T5
II 2D Ex c iaD 20 IP67 T100°C A, HC, HI, I, II, SI, SS P1
II 1G c T5
II 1D c T100°C
I M1 c
I M2 c
II, SI, HI
P1
II 1G c T5
II 1D c T100°C
I M1 c
I M2 c
II, SI, HI N/A
II 2G c T5
II 2D c T100°C A, CI, II, HI, HC, SI, SS N/A
00
II 2G c T5
II 2D c T100°C A, HC, I, SI, SS
00
00
MODEL SPECIFIC
1: PUMP SPECS

www.sa ndp ipe rpu mp.c om Model ST1½/ST40 • 2
st15dl4sm-rev0316
Performance
ST1½ & ST40
SUCTION/DISCHARGE PORT SIZE
• ST1½: 1½ (37.5mm) NPT (F)
• ST40: 1½ (37.5MM) BSP (F)(Tapered)
CAPACITY
• 0 to 90 gallons per minute
(0 to 340 liters per minute)
AIR DISTRIBUTION VALVE
• No-lube, no-stall design
SOLIDS-HANDLING
• Occasional solids only.
Up to ¼ in. (6.3mm)
HEADS UP TO
• 125 psi or 289 ft. of water
(8.8 Kg/cm2 or 88 meters)
MAXIMUM OPERATING PRESSURE
• 125 psi (8.6 bar)
DISPLACEMENT/STROKE
• .37 Gallon / 1.29 liter
SHIPPING WEIGHT
• Aluminum 99 lbs. (46kg)
• Cast Iron 146 lbs. (66kg)
• Stainless Steel 212 lbs. (95kg)
100
90
10(17)
20(34)
30(51) 40(68)
50(85)
60(102)
70(119)
80(136)
80
70
60
50
40
30
20
10
0010 20 30 40 50 60 70 80 90
100 PSI
40 PSI
60 PSI
80 PSI
90(152.9)
0 50 100 150 200 250 300 350
0
1
2
3
4
5
6
7
PSI
BAR
20 PSI Air Inlet Pressure
US Gallons per minute
Liters per minute
CAPACITY
HEAD
AIR CONSUMPTION
SCFM (M3/hr)
MODEL ST1½/ST40 Performance Curve
Performance based on the following: elastomer fitted pump, flooded suction,
water at ambient conditions. The use of other materials and varying hydraulic
conditions may result in deviations in excess of 5%.
Materials
Material Prole: Operating
Temperatures:
Max. Min.
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.
190°F
88°C
-20°F
-29°C
EPDM: Shows very good water and chemical resistance. Has
poor resistance to oils and solvents, but is fair in ketones and
alcohols.
280°F
138°C
-40°F
-40°C
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.
350°F
177°C
-40°F
-40°C
Hytrel®: Good on acids, bases, amines and glycols at room
temperatures only.
220°F
104°C
-20°F
-29°C
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.
200°F
93°C
-10°F
-23°C
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.
190°F
88°C
-10°F
-23°C
Nylon: 6/6 High strength and toughness over a wide
temperature range. Moderate to good resistance to fuels, oils
and chemicals.
180°F
82°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.
180°F
82°C
32°F
0°C
PVDF: (Polyvinylidene Fluoride) A durable uoroplastic with
excellent chemical resistance. Excellent for UV applications.
High tensile strength and impact resistance.
250°F
121°C
0°F
-18°C
Santoprene®: Injection molded thermoplastic elastomer with
no fabric layer. Long mechanical ex life. Excellent abrasion
resistance.
275°F
135°C
-40°F
-40°C
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.
180°F
82°C
-35°F
-37°C
Urethane: Shows good resistance to abrasives. Has poor
resistance to most solvents and oils.
150°F
66°C
32°F
0°C
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.
220°F
104°C
-35°F
-37°C
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.
CAUTION! Operating temperature limitations are as follows:
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.
MODEL SPECIFIC UNIVERSAL ALL AODD
1: PUMP SPECS

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3 • Model ST1½/ST40
st15dl4sm-rev0316
ST1½ & ST40
Dimensions are ±1/8". Figures in parentheses = millimeters.
.13 3
.36 9
16.63 422
16.00 406
19.09 485
DISCHARGE PORT
1 1/2 NPT
1 1/2 BSPT
SUCTION PORT
1 1/2 NPT
1 1/2 BSPT
11.12 282
9.85 250
18.68 475
*12.06 306
13.00 330
5.28 134
9.96 253
*10.06 256
4.58 116
*4.22 107
11.00 279
14.00 356
4X
.50 13
MOUNTING HOLE
8.88 225
10.25 260 .50 13
PUMP TO BASE
MOUNTING HOLE
17.02 432
AIR INLET
3/4 NPT
AIR EXHAUST
3/4 NPT
*
INDICATES DIMENSION WITH SUCTION AND DISCHARGE
PORTS ROTATED 180
TO A VERTICAL POSITION
Dimensional Drawings
MODEL SPECIFIC
1: PUMP SPECS

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st15dl4sm-rev0316
Principle of Pump Operation
Air Line
Discharged
Fluid
Discharge
Stroke Suction
Stroke
Primed
Fluid
Air-Operated Double Diaphragm (AODD) pumps are powered by
compressed air or nitrogen.
The main directional (air) control valve ①distributes compressed
air to an air chamber, exerting uniform pressure over the inner
surface of the diaphragm
②. At the same time, the exhausting air
③ from behind the opposite diaphragm is directed through the
air valve assembly(s) to an exhaust port ④.
As inner chamber pressure (P1) exceeds liquid chamber
pressure (P2), the rod ⑤connected diaphragms shift 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)⑥orientation.
The pump primes as a result of the suction stroke. The suction
stroke lowers the chamber pressure (P3) increasing the chamber
volume. This results in a pressure differential necessary for
atmospheric pressure (P4) to push the uid through the suction
piping and across the suction side check valve and into the outer
uid chamber ⑦.
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.
This Containment Duty SANDPlPER unit differs from other SANDPIPER units only in that it utilizes four
(4) diaphragms instead of two (2). Two rod-connected diaphragms are the driver diaphragms. The other
two (outermost) diaphragms are the actual pumping diaphragms. Each driver diaphragm (of neoprene
or other elastomer), and the pumping diaphragm (of PTFE), are separated by a chamber lled with liquid
which transmits the reciprocating motion of the driver diaphragm to the pumping diaphragm. The PTFE
pumping diaphragms, in turn, create the alternating suction and discharge action in the outer diaphragm
chambers, and are the only diaphragms in contact with liquid being pumped.
SAFE AIR
EXHAUST
DISPOSAL
AREA
PUMP INSTALLATION AREA
1" DIAMETER AIR
EXHAUST PIPING
1" DIAMETER AIR
EXHAUST PIPING
1" DIAMETER AIR
EXHAUST PIPING
MUFFLER
LIQUID
LEVEL
SUCTION
LINE
LIQUID
LEVEL
SUCTION
LINE
MUFFLER
MUFFLER
SUBMERGED ILLUSTRATION
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.
MODEL SPECIFIC
2: INSTAL & OP

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5 • Model ST1½/ST40
st15dl4sm-rev0316
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.
Surge Suppressor
Shut-Off Valve
Pressure Gauge
Drain Port
Shut-Off
Valve
Check
Valve
Air Inlet
Discharge
Unregulated Air
Supply to Surge
Suppressor
Pipe Connection
(Style Optional)
Flexible Connector
Flexible Connector
Vacuum
Gauge
Suction
Shut-Off Valve
Drain Port
Air Dryer
Filter Regulator
Muffler
(Optional Piped Exhaust)
Recommended Installation Guide
Available Accessories:
1. Surge Suppressor
2. Filter/Regulator
3. Air Dryer
1
2
3
Note: Surge Suppressor and
Piping must be supported after
the exible connection
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.
UNIVERSAL ALL AODD, EXCEPT FLAP
2: INSTAL & OP

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st15dl4sm-rev0316
Recommended Installation Guide Filling the Driver Chambers with Liquid
THE DRIVER CHAMBERS WILL BE
FILLED WITH DISTILLED WATER AT THE
FACTORY. IF THE INNER CHAMBER IS
CAST IRON, THE UNIT IS FILLED WITH
ETHYLENE GLYCOL.
If you prefer to substitute another liquid, to prevent
system contamination consult the factory rst to
determine compatibility of the substitute with pump
construction.
Follow the steps listed below to replace the liquid
in the pump after disassembly or liquid loss:
Step 1. Disconnect air supply from pump before
starting any work. Remove the ll and drain
plugs (¼ NPT) (.0635 cm) from the driver chambers.
After the chambers are completely drained of all
liquid, replace the drain plugs and tighten them
securely. NOTE: Use thread sealant on plug threads.
Step 2. Remove the two large (1 NPT) (2.54
cm) pipe plugs (one on each side) located in
the rear of the innermost air chambers.
Step 3. Determine which side of the pump is on the
discharge stroke and which side is on the suction
stroke by checking the positions of the diaphragm
assemblies. The cast inner diaphragm plate closest
to the pump intermediate housing, or centerline,
is the chamber in the suction stroke position. The
opposite chamber, with cast inner diaphragm plate
away from unit centerline, is in the discharge stroke
position. NOTE: The diaphragm assemblies (cast
inner diaphragm plates) are visible through the two
tapped holes in the inner chambers from which the
two large pipe plugs were removed.
Step 4. For pumps with air valve assemblies
031.098.010 or 031.098.156
Insert the safety clip (210-008-330) on one side
of the main air valve body and cycle the pump at 5
to 10 psi. As you face the pump, the side with the pin
should be the rst driver uid reservoir to be lled.
The driver diaphragm will be on a suction
stroke. Pour the correct amount of liquid into the
reservoir. The uid level will not come completely to
the top. Loosely install the pipe plug, with pipe dope,
PTFE tape or o-ring (depending on pump model)
placed on the threads. Release all air pressure to the
pump and remove the safety clip. The diaphragm will
relax and will come to center. Watch the loose pipe
plug closely as air escapes and the driver uid level
rises. Insert the safety clip on the opposite side and
add a small amount of air pressure. When you see
liquid weeping out between the loose pipe plug and
ll hole, tighten the pipe plug. Repeat the procedure
for the unlled chamber.
If you have a problem getting the driver uid to come
to the top, a blunt instrument can be inserted into the
chamber port of the pump and pressure can manually
be applied to the pumping diaphragm to cause the
liquid to come to the top. Do this carefully. A needle
valve for precision stroking control is recommended
at the air inlet for this procedure. Please be aware that
air left in the chambers will result in faulty operation of
the pump and will cause premature pumping
diaphragm failure.
For pumps not equipped with Visual Leak Detection
sight tubes, ll with 1200ml/ 40.6 . oz.
For pumps equipped with Visual Leak Detection sight
tubes, ll with 1250ml/ 42.3 . oz.
Use pipe sealant on pipe plugs. Cast iron fluid
chambers typically lled with normal antifreeze.
Step 5. After lling, the liquid will not come all the
way to the top of the lling hole. Use a screwdriver or
similar tool to apply leverage on the inner diaphragm
plate (diaphragm assembly) forcing the driver
diaphragm on the side you have just lled partially
through its discharge stroke until the liquid level in the
chamber you are lling comes to the top of the ll hole.
This displaces any air in the chamber. CAUTION: Do
not pry on or damage the elastomer diaphragm while
performing this step of the lling instructions.
Step 6. Re-plug the ll hole and tighten securely.
NOTE: Use thread sealant on plug threads and tighten
only until snug.
Step 7. Using a screwdriver or similar tool apply
leverage on the inner diaphragm plate (diaphragm
assembly), on the side just lled, forcing the pump to
“shift” or reverse diaphragm positions.
Step 8. Follow steps (4) thru (6) to ll the opposite
driver chamber.
Step 9. Re-install the two large pipe plugs in the rear
of the pump inner air chambers. NOTE: Use thread
sealant on plug threads.
2: INSTAL & OP

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7 • Model ST1½/ST40
st15dl4sm-rev0316
Troubleshooting Guide
For additional troubleshooting tips contact After Sales Support at [email protected] or 419-524-8388
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 ow.
(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 ow.
(Does not apply to high pressure 2:1 units).
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.
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 ngers 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 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.
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 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).
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).
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.
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 ooded 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, 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.
UNIVERSAL ALL SANDPIPER, EXCEPT FLAP
2: INSTAL & OP

www.sa ndp ipe rpu mp.c om Model ST1½/ST40 • 8
st15dl4sm-rev0316
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 ow.
(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 ow.
(Does not apply to high pressure 2:1 units).
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.
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 ngers 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 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.
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 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).
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).
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.
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 ooded 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, 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.
476.131.000 AIR END KIT
Sleeve and Spool Set, Seals, Gaskets, O-rings, Bumpers,
Plunger Actuator, Plunger Bushings, and Pilot Valve Assembly
476.314.000 AIR END WEAR KIT
Seals, O-rings, Gaskets, Grease Packet Bumpers, Plunger
Actuators, Plunger Bushings
476.039.634 WET END KIT
EPDM Driver Diaphragms, PTFE Pumping Diaphragms, PTFE
Check Balls, PTFE Gasets, EDPM O-rings,
and FEP Encapsulated Silicone O-rings
476.039.635 WET END KIT
Neoprene Driver Diaphragms, PTFE Pumping Diaphragms,
PTFE Check Balls, PTFE Gaskets, Nitrile O-rings, and FEP
Encapsulated Silicone O-rings
476.039.637 WET END KIT
FKM Driver Diaphragms, PTFE Pumping Diaphragms,
PTFE Check Balls, PTFE Gaskets, FKM O-rings, and FEP
Encapsulated Silicone O-rings
26
51
26
13
23
27
30
12
58
25
259
58
35
26
50
26
33
2
38
25
55
15
58
45
32
54
16
18
44
22
39
53
52
17
40
43
21
42
46
58
35
20
8
34
57
10
31
44
37
47 36 9
28
4
29
14
27
7
6
12
58
1
58
11
49
48
35 58
38
7
6
52
3
41
BBBBB
AA
Optional Angle Valve Kit: A
These items available in kit form
only Order PN: 475.102.000.
Optional Rubber Foot Kit: B
These items available in kit form
only Order PN: 475.101.000.
56
Composite Repair Parts Drawing
Service & Repair Kits
MODEL SPECIFIC
3: EXP VIEW

www.sa ndp ipe rpu mp.c om
9 • Model ST1½/ST40
st15dl4sm-rev0316
Composite Repair Parts List
Item Part Number Description Qty.
30 518.003.110 MANIFOLD 1
518.003.112 MANIFOLD 1
518.003.156 MANIFOLD 1
518.003.010 MANIFOLD 1
31 530.036.000 MUFFLER 1
32 538.083.110 NIPPLE, PIPE, 1/4" NPT, CLOSE 4
33 544.002.115 NUT, HEX FLANGED, 3/8-16 6
34 545.005.110 NUT, HEX, 5/16-18 4
35 545.007.115 NUT, HEX - 7/16-14 40
36 560.001.360 O-RING 2
37 560.022.360 O-RING 2
38 560.028.610 O-RING 2
39 560.043.360 O-RING 2
560.043.363 O-RING 2
560.043.364 O-RING 2
40 560.070.610 O-RING 2
41 612.007.150 PLATE, BASE 1
42 612.052.157 PLATE, INNER DIAPHRAGM 2
612.052.010 PLATE, INNER DIAPHRAGM 2
43 612.096.110 PLATE, OUTER DIAPHRAGM 2
44 618.003.110 PLUG, PIPE, 1/4 6
618.003.112 PLUG, PIPE, 1/4 4
45 618.003.110 PLUG, PIPE, 1/4 4
46 618.007.115 PLUG, PIPE, 1" NPT 2
47 620.011.114 PLUNGER, ACTUATOR 2
48 685.007.120 BUMPER, DIAPHRAGM 1
49 720.004.360 SEAL, U-CUP 2
50 722.010.110 SEAT, CHECK VALVE - SUCTION 1
722.010.112 SEAT, CHECK VALVE - SUCTION 1
51 722.031.110 SEAT, CHECK VALVE - DISCHARGE 1
722.031.112 SEAT, CHECK VALVE - DISCHARGE 1
52 807.017.115 7/16-14 X 3 STUD 4
53 807.033.115 STUD, 7/16-14 X 2.00 16
54 835.005.110 TEE, PIPE, 1/4 NPT 4
55 860.064.606 TUBE 2
56 866.060.110 CONNECTOR, TUBE 4
57 900.005.110 WASHER, LOCK, 3/8 5
58 900.006.115 WASHER, LOCK, 7/16 56
59 905.001.306 WASHER, TAPERED 4
Not Shown:
242-001-000 Fill Bottle 1
Item Part Number Description Qty.
1 031.098.010 ASSEMBLY, MAIN AIR VALVE 1
031.098.156 ASSEMBLY, MAIN AIR VALVE 1
2 050.010.600 BALL, CHECK 4
3 070.006.170 BEARING 2
4 095.073.001 PILOT VALVE ASSEMBLY 1
5 114.002.010 BRACKET, INTERMEDIATE 1
114.002.156 BRACKET, INTERMEDIATE 1
6 115.062.080 BRACKET, MOUNTING FOOT, LEFT 2
7 115.063.080 BRACKET, MOUNTING FOOT, RIGHT 2
8 132.002.360 BUMPER, DIAPHRAGM 2
9 135.016.162 BUSHING, THREADED 2
10 170.006.110 CAPSCREW, HEX HD, 5/16-18 X 7/8 4
11 170.024.115 CAPSCREW, HEX HD, 7/16-14 X 1 8
12 170.035.115 CAPSCREW, HEX HD, 7/16-14 X 1.50 4
13 170.040.115 CAPSCREW, HEX HD, 3/8-16 X 5.50 6
14 170.045.115 CAPSCREW, HEX HEAD 5/16-18 X 1 1/4 4
15 170.058.115 CAPSCREW, HEX HD, 7/16-14 X 1.25 4
16 170.060.115 CAPSCREW, HEX HD, 7/16-14 X 2.00 20
17 171.002.110 CAPSCREW, SOC HD, 5/8-11 X 1.50 2
18 196.027.110 CHAMBER, OUTER 2
196.027.112 CHAMBER, OUTER 2
196.027.156 CHAMBER, OUTER 2
196.027.010 CHAMBER, OUTER 2
19 196.028.010 CHAMBER, SPILL CONTAINMENT 2
196.028.156 CHAMBER, SPILL CONTAINMENT 2
20 196.029.010 CHAMBER, INNER 2
196.029.156 CHAMBER, INNER 2
21 286.005.354 DIAPHRAGM 2
286.005.363 DIAPHRAGM 2
286.005.364 DIAPHRAGM 2
286.005.365 DIAPHRAGM 2
22 286.017.604 DIAPHRAGM, PUMPING 2
23 334.006.110 FLANGE, DISCHARGE 1
334.006.112 FLANGE, DISCHARGE 1
334.006.156 FLANGE, DISCHARGE 1
334.006.010 FLANGE, DISCHARGE 1
24 334.007.110 FLANGE, SUCTION 1
334.007.112 FLANGE, SUCTION 1
334.007.156 FLANGE, SUCTION 1
334.007.010 FLANGE, SUCTION 1
25 334.008.110 FLANGE, PORTING 2
334.008.112 FLANGE, PORTING 2
334.008.156 FLANGE, PORTING 2
334.008.010 FLANGE, PORTING 2
334.008.110 E FLANGE, PORTING, BSP TAPERED 2
334.008.112 E FLANGE, PORTING, BSP TAPERED 2
334.008.156 E FLANGE, PORTING, BSP TAPERED 2
334.008.010 E FLANGE, PORTING, BSP TAPERED 2
26 360.017.608 GASKET, MANIFOLD/SEAT 4
27 360.022.600 GASKET, MANIFOLD 2
28 360.041.379 GASKET 1
29 360.048.425 GASKET 1
LEGEND:
= Items contained within Air End Kits
= Items contained within Wet End Kits
Note: Kits contain components specic to the material codes.
Parts underlined are only available for sale in kits
Parts that are boxed are not available for sale
MODEL SPECIFIC
3: EXP VIEW

www.sa ndp ipe rpu mp.c om Model ST1½/ST40 • 10
st15dl4sm-rev0316
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
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®/EPDM
644.....Santoprene®/PTFE
656.....Santoprene®Diaphragm and
Check Balls/EPDM Seats
661.....EPDM/Santoprene®
666.....FDA Nitrile Diaphragm,
PTFE Overlay, Balls, and Seals
668.....PTFE, FDA Santoprene®/PTFE
• 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.
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.
UNIVERSAL ALL SP
3: EXP VIEW

1.D
1.F
1.C
1.A1.A
1.F
1.B
1.G
1.D
1.E
Page 19
1.H
Note to Trent: Do not paste this table in S/M. Only use to modify on
on page 19
www.sa ndp ipe rpu mp.c om
11 • Model ST1½/ST40
st15dl4sm-rev0316
Air Valve with Stroke Indicator Assembly
MAIN AIR VALVE ASSEMBLY PARTS LIST
Item Part Number Description Qty
1 031.098.156 Air Valve Assembly 1
1.A 031.012.000 Sleeve and Spool Set 1
1.B 095.043.156 Air Valve Body 1
1.C 132.014.358 Bumper 2
1.D 165.065.010 End Cap 2
1.E 170.032.330 Hex Head Capscrew 1/4-20 UNC 2B x .75 long 8
1.F 360.010.425 Gasket 2
1.G 210.008.330 Safety Clip 1
1.H 560.029.360 O-ring 2
For Pumps with Cast Iron Center Sections:
1 031.098.010 Air Valve Assembly 1
1.A 031.012.000 Sleeve and Spool Set 1
1.B 095.043.010 Air Valve Body 1
1.C 132.014.358 Bumper 2
1.D 165.065.010 End Cap 2
1.E 170.032.330 Hex Head Capscrew 1/4-20 UNC 2B x .75 long 8
1.F 360.010.425 Gasket 2
1.G 210.008.330 Safety Clip 1
1.H 560.029.360 O-ring 2
Air Distribution Valve Servicing
See repair parts drawing, remove screws.
Step 1: Remove end cap retainer (1-G).
Step 2: Remove end cap (1-E), bumper (1-D).
Step 3: Remove spool part of (1-B) (caution, do not scratch).
Step 4: Press sleeve (1-B) from body (1-A).
Step 5: Inspect O-Ring (1-C) and replace if necessary.
Step 6: Lightly lubricate O-Rings (1-C) on spool (1-B).
Step 7: Press sleeve (1-B) into body (1-A).
Step 8: Reassemble in reverse order.
Note: Sleeve and spool (1-B) set is match ground to a specied clearance
sleeve and spools (1-B) cannot be interchanged.
LEGEND:
= Items contained within Air End Kits
Note: Kits contain components specic to the material codes.
MODEL SPECIFIC
4: AIR END

www.sa ndp ipe rpu mp.c om Model ST1½/ST40 • 12
st15dl4sm-rev0316
Pilot Valve Assembly
PILOT VALVE ASSEMBLY PARTS LIST
Item Part Number Description Qty
4 095.073.001 Pilot Valve Assembly 1
4-A 095.070.558 Valve Body 1
4-B 755.025.000 Sleeve (With O-Rings) 1
4-C 560.033.360 O-Ring (Sleeve) 4
4-D 775.026.000 Spool (With O-Rings) 1
4-E 560.023.360 O-Ring (Spool) 2
4-F 675.037.080 Retaining Ring 1
4-A
4-F
4-D
4-B
4-C
4-E
Pilot Valve Servicing
With Pilot Valve removed from pump.
Step 1: Remove snap ring (4-F).
Step 2: Remove sleeve (4-B), inspect O-Rings (4-C),
replace if required.
Step 3: Remove spool (4-D) from sleeve (4-B),
inspect O-Rings (4-E), replace if required.
Step 4: Lightly lubricate O-Rings (4-C) and (4-E).
Reassemble in reverse order. LEGEND:
= Items contained within Air End Kits
Note: Kits contain components specic to the material codes.
MODEL SPECIFIC
4: AIR END

www.sa ndp ipe rpu mp.c om
13 • Model ST1½/ST40
st15dl4sm-rev0316
Declaration of Conformity
Signature of authorized person Date of issue
Printed name of authorized person
Revision Level: F
Title
David Roseberry Engineering Manager
October 20, 2005
Date of revision
August 23, 2012
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®Surge Suppressors comply with
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.
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®,SANDPIPER®, MARATHON®, PortaPump®, SludgeMaster™ and Tranquilizer®.
~ See sandpiperpump.com/content/warranty-certifications for complete warranty,
including terms and conditions, limitations and exclusions. ~
UNIVERSAL ALL SP
5: WARRANTY

Manufacturer:
Warren Rupp, Inc.
A Unit of IDEX Corportion
800 North Main Street
P.O. Box 1568
Mansfield, OH 44902 USA
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).
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
Applicable Standard:
EN13463-1: 2001
EN13463-5: 2003
EN60079-25: 2004
Harmonised Standard:
EN13463-1: 2009
EN13463-5: 2011
EN60079-25:2010
David Roseberry, Director of Engineering
DATE/APPROVAL/TITLE:
18 March 2016
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
UNIVERSAL ALL SP
5: WARRANTY