This ball check valve pump is powered by compressed air and is a 1:1 pressure
ratio design. It alternately pressurizes the inner side of one diaphragm chamber, while
simultaneously exhausting the other inner chamber. This causes the diaphragms, which
are connected by a common rod, to move endwise. Air pressure is applied over the
entire surface of the diaphragm, while liquid is discharged from the opposite side. The
diaphragm operates under a balanced condition during the discharge stroke, which allows the unit to be operated at discharge heads over 200 feet (61 meters) of water head.
Since the diaphragms are connected by a common rod, secured by plates to the
center of the diaphragms, one diaphragm performs the discharge stroke, while the
other is pulled to perform the suction stroke in the opposite chamber.
For maximum diaphragm life, keep the pump as close to the liquid being pumped
as possible. Positive suction head in excess of 10 feet of liquid (3.048 meters) may
require a back pressure regulating device. This will maximize diaphragm life.
Alternate pressuring and exhausting of the diaphragm chamber is performed by
means of an externally mounted, pilot operated, four-way spool type air distribution
valve. When the spool shifts to one end of the valve body, inlet air pressure is applied
to one diaphragm chamber and the other diaphragm chamber exhausts. When the
spool shifts to the opposite end of the valve body, the porting of chambers is reversed.
The air distribution valve spool is moved by an internal pilot valve which alternately
pressurizes one side of the air distribution valve spool, while exhausting the other side.
The pilot valve is shifted at each end of the diaphragm stroke by the diaphragm plate
coming in contact with the end of the pilot valve spool. This pushes it into position for
shifting of the air distribution valve.
The chambers are manifolded together with a suction and discharge check valve
for each chamber, maintaining flow in one direction through the pump.
Model SSB2-A
INSTALLATION & START-UP
Locate the pump as close to the product being pumped as possible, keeping suction
line length and number of fittings to a minimum. Do not reduce line size.
For installations of rigid piping, short flexible sections of hose should be installed
between pump and piping. This reduces vibration and strain to the piping system.
A Warren Rupp Tranquilizer
pulsation in flow.
This pump was tested at the factory prior to shipment and is ready for operation.
It is completely self-priming from a dry start for suction lifts of 20 feet (6.096 meters)
or less. For suction lifts exceeding 20 feet of liquid, fill the chambers with liquid prior
to priming.
®
surge suppressor is recommended to further reduce
AIR SUPPLY
Air supply pressures cannot exceed 125 psi (8.61 bar). Connect the pump air inlet
to an air supply of sufficient capacity and pressure required for desired performance.
When the air line is solid piping, use a short length of flexible hose (not less than 3/4"
[19mm] in diameter) between pump and piping to eliminate strain to pipes. Use of a
Warren Rupp Filter/Regulator in the air line is recommended.
AIR INLET & PRIMING
ssb2dl3sm-REV0614 Model SSB2-A Type 3 Page 1
For start-up, open an air valve approximately 1/2 to 3/4turn. After the unit primes,
an air valve can be opened to increase flow as desired. If opening the valve increases
cycling rate, but does not increase flow rate, cavitation has occurred, and the valve
should be closed slightly.
For the most efficient use of compressed air and the longest diaphragm life, throttle
the air inlet to the lowest cycling rate that does not reduce flow.
AIR EXHAUST
If a diaphragm fails, the pumped liquid or fumes can enter the air end of the pump,
and be exhausted into the atmosphere. When pumping hazardous or toxic materials,
pipe the exhaust to an appropriate area for safe disposition.
This pump can be submerged if materials of construction are compatible with the liquid.
The air exhaust must be piped above the liquid level. Piping used for the air exhaust must
not be smaller than 1" (2.54 cm). Reducing the pipe size will restrict air flow and reduce
pump performance. When the product source is at a higher level than the pump (flooded
suction), pipe the exhaust higher than the product source to prevent siphoning spills.
Freezing or icing of the air exhaust can occur under certain temperature and humidity conditions. Use of a Warren Rupp Air Dryer should eliminate most icing problems.
BETWEEN USES
When used for materials that tend to settle out or transform to solid form, the pump
should be completely flushed after each use, to prevent damage. Product remaining
in the pump between uses could dry out or settle out. This could cause problems with
valves and diaphragms at re-start. In freezing temperatures, the pump must be drained
between uses in all cases.
CHECK VALVE SERVICING
Need for inspection or service is usually indicated by poor priming, unstable cycling,
reduced performance or the pump’s cycling but not pumping.
Inspect the surfaces of both check valve and seat for wear or damage that could
prevent proper sealing. If pump is to prime properly, valves must seat air tight.
DIAPHRAGM SERVICING
Remove the stud nuts (six each side) securing the elbows to the outer
chambers. Remove the eight knobs securing the outer chamber to the inner chamber.
Remove the diaphragm assembly (outer plate, diaphragm, inner plate) by turning the
assembly counterclockwise using a 15/16 (2.38 cm) wrench on the outer plate lugs. To
disassemble the diaphragm assemblies, screw into the inner plates two threaded pins,
place the pins in a vise and turn the outer plate counterclockwise using the 15/16
wrench. The interior components consisting of U-cup seals and sleeve bearings are now
accessible for service.
Procedures for reassembling the diaphragms are the reverse of the above. The
diaphragms must be installed with their natural bulge to the outside, toward the outer
diaphragm plate. Install the inner plate with the flat face against the diaphragm.
After all components are in position in a vise and hand tight, tighten with a wrench
to approximately 40 ft. Ibs. (54.23 Newton meters) torque. After both diaphragm
assemblies have been assembled, thread one assembly into the shaft (hold the shaft
near the middle in a vise with soft jaws, to protect the finish). Install this subassembly
into the pump and secure by placing the outer chamber on the end with the diaphragm.
This holds the assembly in place while the opposite side is installed. Torque the last
diaphragm assembly to 30 ft. Ibs. (40.67 Newton meters). This final torquing will lock the
diaphragm assemblies together. Place the remaining outer chamber on the open end
and loosely tighten the bolts. Replace the manifold assemblies to square the flanges
before final tightening of the remaining bolts. Alternating for progressive tightening, the
eight knobs that secure outer chamber to inner chamber.
A NOTE ABOUT AIR VALVE LUBRICATION
The SANDPIPER pump’s pilot valve and main air valve assemblies are designed to
Model SSB2-A Type 3 Page 2 ssb2dl3sm-REV0614
operate WITHOUT lubrication. This is the preferred mode of operation. There may be
instances of personal preference, or poor quality air supplies when lubrication of the
compressed air supply is required. The pump air system will operate with properly lubricated compressed air supplies. Proper lubrication of the compressed air supply would
entail the use of an air line lubricator (available from Warren Rupp) set to deliver one
drop of 10 wt., non-detergent oil for every 20 SCFM of air the pump consumed at its
point of operation. Consult the pump’s published Performance Curve to determine this.
It is important to remember to inspect the sleeve and spool set routinely. It should
move back and forth freely. This is most important when the air supply is lubricated.
If a lubricator is used, oil accumulation will, over time, collect any debris from the
compressed air. This can prevent the pump from operating properly.
Water in the compressed air supply can create problems such as icing or
freezing of the exhaust air causing the pump to cycle erratically, or stop operating. This
can be addressed by using a point of use air dryer (available from Warren Rupp) to
supplement a plant’s air drying equipment. This device will remove excess water from
the compressed air supply and alleviate the icing or freezing problem.
ESADS: EXTERNALLY SERVICEABLE AIR
DISTRIBUTION SYSTEM
Please refer to the exploded view drawing and parts list in the Service Manual
supplied with your pump. If you need replacement or additional copies, contact your
local Warren Rupp Distributor, or the Warren Rupp factory Literature Department at
the number shown below. To receive the correct manual, you must specify the MODEL
and TYPE in formation found on the name plate of the pump.
MODELS WITH 1" SUCTION/DISCHARGE OR LARGER, AND
METAL CENTER SECTIONS
The main air valve sleeve and spool set is located in the valve body mounted on
the pump with four hex head capscrews. The valve body assembly is removed from
the pump by removing these four hex head capscrews.
With the valve body assembly off the pump, access to the sleeve and spool set is
made by removing four hex head capscrews (each end) on the end caps of the valve
body assembly. With the end caps removed, slide the spool back and forth in the
sleeve. The spool is closely sized to the sleeve and must move freely to allow for proper
pump operation. An accumulation of oil, dirt or other contaminants from the pump’s
air supply, or from a failed diaphragm, may prevent the spool from moving freely. This
can cause the spool to stick in a position that prevents the pump from operating. If
this is the case, the sleeve and spool set should be removed from the valve body for
cleaning and further inspection.
Remove the spool from the sleeve. Using an arbor press or bench vise (with an
improvised mandrel), press the sleeve from the valve body. Take care not to damage
the sleeve. At this point, inspect the o-rings on the sleeve for nicks, tears or abrasions.
Damage of this sort could happen during assembly or servicing. A sheared or cut
o-ring can allow the pump’s compressed air supply to leak or bypass within the air
valve assembly, causing the pump to leak compressed air from the pump air exhaust
or not cycle properly. This is most noticeable at pump dead head or high discharge
pressure conditions. Replace any of these o-rings as required or set up a routine,
preventive maintenance schedule to do so on a regular basis. This practice should
include cleaning the spool and sleeve components with a safety solvent or equivalent,
inspecting for signs of wear or damage, and replacing worn components.
To re-install the sleeve and spool set, lightly lubricate the o-rings on the sleeve with
an o-ring assembly lubricant or lightweight oil (such as 10 wt. air line lubricant). Press
the set into the valve body easily, without shearing the o-rings. Re-install one end cap,
gasket and bumper on the valve body. Using the arbor press or bench vise that was
used in disassembly, press the sleeve back into the valve body. You may have to clean
the surfaces of the valve body where the end caps mount. Material may remain from
the old gasket. Old material not cleaned from this area may cause air leakage after
reassembly. Take care that the bumper stays in place allowing the sleeve to press in
all the way.
Re-install the spool, the opposite end cap, gasket and bumper on the valve body.
After inspecting and cleaning the gasket surfaces on the valve body and intermediate,
re-install the valve body on the pump using new gaskets. Tighten the four hex head
ssb2dl3sm-REV0614 Model SSB2-A Type 3 Page 3
capscrews evenly and in an alternating cross pattern.
PILOT VALVE SERVICING
This assembly is reached by removing the air distribution valve body from the pump
and lifting the pilot valve body out of the intermediate housing.
When reinserting an externally serviceable pilot valve, push both plungers out of the
path of the pilot valve so that they and the pilot valve are not damaged.
Service Note: If a problem arises with the pilot valve, it is usually corrected by replacing
only o-rings. Always grease the spool prior to inserting into the sleeve. If the sleeve is
removed from the body, reinsertion must be from the same side it was removed from,
the chambered side. Again, grease the o-rings so that it slides into the body. Make sure
the retaining ring has securely been inserted around the sleeve.
PILOT VALVE ACTUATOR SERVICING
The bushings for the pilot valve actuators are pressed into the intermediate bracket
from the outside. The plunger may be removed for inspection or replacement from the
inside by removing the air distribution valve body and the pilot valve body from the pump.
The plungers should be visible as you look into the intermediate from the top. Depending
on their position, you may find it necessary to use a fine piece of wire to pull them out.
Under rare circumstances, it may become necessary to replace the o-ring seal. The
bushing can be pushed through the inner chamber by removing the outer chamber
assembly to reach the bushing.
TROUBLESHOOTING
1. Pump will not cycle
A. Check to make sure the unit has enough pressure to operate and that the air inlet
valve is open.
B. Check the discharge line to insure that the discharge line is neither closed nor blocked.
C. If the spool in the air distribution valve is not shifting, check the main spool. It must
slide freely.
D. Excessive air leakage in the pump can prevent cycling. This condition will be evident.
Air leakage into the discharge line indicates a ruptured diaphragm. Air leakage from
the exhaust port indicates leakage in the air distribution valve. See further service
instructions.
E. Blockage in the liquid chamber can impede movement of diaphragm.
2. Pump cycles but will not pump
A. Suction side of pump pulling in air. Check the suction line for air leaks and be sure
that the end of the suction line is submerged. Check flange bolting. Check valve flanges
and manifold to chamber flange joints.
B. Make certain the suction line or strainer is not plugged. Restriction at the
suction is indicated by a high vacuum reading when a vacuum gauge is installed in the
suction line.
C. Check valves may not be seating properly. To check, remove the suction line and cover
the suction port with your hand. If the unit does not pull a good suction (vacuum), the
check valves should be inspected for proper seating.
D. Static suction lift may be too high. Priming can be improved by elevating the suction
and discharge lines higher than the check valves and pouring liquid into the unit through
the suction inlet. When priming at high suction lifts or with long suction lines operate the
pump at maximum cycle rate.
3. Low performance
A. Capacity is reduced as the discharge pressure increases, as indicated on the
performance curve. Performance capability varies with available inlet air supply. Check
air pressure at the pump inlet when the pump is operating to make certain that adequate
Model SSB2-A Type 3 Page 4 ssb2dl3sm-REV0614
air supply is maintained.
B. Check vacuum at the pump suction. Capacity is reduced as vacuum increases.
Reduced flow rate due to starved suction will be evident when cycle rate can be varied
without change in capacity. This condition will be more prevalent when pumping viscous
liquids. When pumping thick, heavy materials the suction line must be kept as large in
diameter and as short as possible, to keep suction loss minimal.
C. Low flow rate and slow cycling rate indicate restricted flow through the discharge line.
Low flow rate and fast cycling rate indicate restriction in the suction line or air leakage
into suction.
D. Unstable cycling indicates improper check valve seating on one chamber. This
condition is confirmed when unstable cycling repeats consistently on alternate exhausts.
Cycling that is not consistently unstable may indicate partial exhaust restriction due
to freezing and thawing of exhaust air. Use of an anti-freeze lubricant in an air line
lubricator should solve this problem.
For additional information, see the Warren Rupp Troubleshooting Guide.
WARRANTY
This pump is warranted for a period of five years against defective material and
workmanship. Failure to comply with the recommendations stated in this manual voids
all factory warranty.
RECOMMENDED WARREN RUPP ACCESSORIES TO
MAXIMIZE PUMP PERFORMANCE:
• Tranquilizer® Surge Suppressor: For nearly pulse-free flow.
• Warren Rupp Air Dryer: For clean, dry compressed air.
• Warren Rupp Filter/Regulator: For modular installation and service
convenience.
• Warren Rupp Speed Control: For manual or programmable process
control. (Manual adjustment or 4-20mA reception.)
For more detailed information on these accessories, contact your local
Warren Rupp Factory-Authorized Distributor, or Warren Rupp corporate
headquarters.
ssb2dl3sm-REV0614 Model SSB2-A Type 3 Page 5
IMPORTANT SAFETY
INFORMATION
IMPORTANT
Read these safety warnings
Read these safety warnings
and instructions in this
and instructions in this
manual completely, before
manual completely, before
installation and start-up
of the pump. It is the responsibility of the
of the pump. It is the responsibility of the
purchaser to retain this manual for reference.
purchaser to retain this manual for reference.
Failure to comply with the recommendations
Failure to comply with the recommendations
stated in this manual will damage the pump,
stated in this manual will damage the pump,
and void factory warranty.
and void factory warranty.
prevent leakage. Follow recommended torques
stated in this manual.
gas will void the warranty.
the pump. The discharge line may be pressurized
and must be bled of its pressure.
pumping a product which is hazardous or toxic,
the air exhaust must be piped to an appropriate
area for safe disposition.
installation and start-up
CAUTION
Before pump operation,
inspect all gasketed
fasteners for looseness
caused by gasket creep. Retorque loose fasteners to
CAUTION
Pump not designed,
tested or certied to be
powered by compressed
natural gas. Powering
the pump with natural
WARNING
Before maintenance
or repair, shut off the
compressed air line,
bleed the pressure, and
disconnect the air line from
WARNING
In the event of diaphragm
rupture, pumped material
may enter the air end of the
pump, and be discharged
into the atmosphere. If
WARNING
Take action to prevent static
sparking. Fire or explosion
can result, especially when
handling flammable liquids.
The pump, piping, valves,
containers or other miscellaneous equipment
must be grounded. (See page 8)
WARNING
This pump is pressurized
internally with air pressure
during operation. Always
make certain that all bolting
is in good condition and
that all of the correct
bolting is reinstalled during assembly.
WARNING
When used for toxic or
aggressive fluids, the pump
should always be flushed
clean prior to disassembly.
WARNING
Before doing any
maintenance on the pump,
be certain all pressure is
completely vented from the
pump, suction, discharge,
piping, and all other openings and connections.
Be certain the air supply is locked out or made
non-operational, so that it cannot be started
while work is being done on the pump. Be certain
that approved eye protection and protective
clothing are worn all times in the vicinity of the
pump. Failure to follow these recommendations
may result in serious injury or death.
WARNING
Airborne particles and
loud noise hazards.
Wear ear and eye
protection.
WARNING
Use safe practices
when lifting
kg
RECYCLING
Many components of SANDPIPER
of recyclable materials (see chart on page 9 for material
specications). We encourage pump users to recycle
worn out parts and pumps whenever possible, after
any hazardous pumped uids are thoroughly ushed.
®
AODD pumps are made
CE
II 2GD T5
Pump complies with EN809 Pumping Directive,
Directive 2006/42/EC Machinery, according to
Annex VIII.
Pump complies with Directive 94/9/EC, EN13463-1
Equipment for use in Potentially Explosive
Environments. For reference to the directive
certificates visit: www.warrenrupp.com.
The Technical File No. AX1 is stored at
KEMA, Notified Body 0344, under Document
#203040000.
Model SSB2-A Type 3 Page 6 ssb2dl3sm-REV0614
Grounding The Pump
The clamp end is installed to a true earth ground.
The eyelet end is fastened to the pump hardware.
WARNING
Take action to prevent static sparking.
Fire or explosion can result, especially
when handling flammable liquids. The
pump, piping, valves, containers or
other miscellaneous equipment must
be grounded.
This 8 foot long (244
centimeters) Ground Strap, part
number 920-025-000 can be
ordered as a service item.
To reduce the risk of static electrical sparking, this pump must be
grounded. Check the local electrical code for detailed grounding
instruction and the type of equipment required, or in the absence of local
codes, an industry or nationally recognized code having jurisdiction over
specific installations.
ssb2dl3sm-REV0614 Model SSB2-A Type 3 Page 7
MATERIAL CODES
THE LAST 3 DIGITS OF PART NUMBER
000 Assembly, sub-assembly;
and some purchased items
010 Cast Iron
012 Powered Metal
015 Ductile Iron
020 Ferritic Malleable Iron
025 Music Wire
080 Carbon Steel, AISI B-1112
100 Alloy 20
110 Alloy Type 316 Stainless Steel
111 Alloy Type 316 Stainless Steel
(Electro Polished)
112 Alloy C
113 Alloy Type 316 Stainless Steel
Repair Parts shown in bold face (darker)
type are more likely to need replacement
after extended periods of normal use. The
pump owner may prefer to maintain a limited
inventory of these parts in his own stock to
reduce repair downtime to a minimum.
IMPORTANT: When ordering repair parts
always furnish pump model number, serial
number and type number.