This ball 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 spool. This pushes it into position for
shifting of the air distribution valve.
The chambers are manifolded together with a suction and discharge ap-type
check valve for each chamber, maintaining ow in one direction through the pump.
Mine/Construction Duty
Ball Valve
Type 3
INSTALLATION & START-UP
Locate the pump as close to the product being pumped as possible, keeping
suction line length and number of ttings to a minimum. Do not reduce line size.
For installations of rigid piping, short exible 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 ow.
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 10 feet (3.05 meters) or
less. For suction lifts exceeding 20 feet of liquid, ll 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 sufcient capacity and pressure required for desired performance.
When the air line is solid piping, use a short length of exible hose [not less than
3/4" (19mm) in diameter] between pump and piping to eliminate strain to pipes.
msb2dl3sm-REV0614 Model MSB2 Page 1
Page 4
AIR INLET & PRIMING
For start-up, open an air valve approximately 1/2" to 3/4" turn. After the unit primes,
an air valve can be opened to increase ow as desired. If opening the valve increases
cycling rate, but does not increase ow rate, cavitation has occurred, and the valve
should be closed slightly.
For the most efcient use of compressed air and the longest diaphragm life, throttle
the air inlet to the lowest cycling rate that does not reduce ow.
A NOTE ABOUT AIR VALVE LUBRICATION
The Sandpiper pump’s pilot valve and main air valve assemblies are designed to
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 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 information 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.
Model MSB2 Page 2 msb2dl3sm-REV0614
Page 5
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).
Re-install one end cap, gasket and bumper on the valve body. Using the arbor press
or bench vise that was used in disassembly, carefully press the sleeve back into the
valve body, without shearing the o-rings. 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. Reinstall the
spool, opposite end cap, gasket and bumper on the valve body. After inspecting and
cleaning the gasket surfaces on the valve body and intermediate, reinstall the valve
body on the pump using new gaskets. Tighten the four hex head capscrews evenly
and in an alternating cross pattern.
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 ow and reduce pump performance .When the product source is at a higher level
than the pump (ooded suction), pipe the exhaust higher than the product source to
prevent siphoning spills. (See page 7)
Freezing or icing-up of the air exhaust can occur under certain temperature and
humidity conditions. Use of an air dryer unit 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 ushed 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 bt poor priming, unstable cycling,
reduced performance or the pump's cycling, but not pumping.
Inspect the surfaces of both check valves and seats for wear or damage that could
prevent proper sealing. If pump is to prime properly, valves must seat air tight.
DIAPHRAGM SERVICING
Remove the eight bolts (four each side) securing the manifold assemblies to the
outer chambers. Remove the eight bolts securing the outer chamber to the inner
chamber. Remove the diaphragm assembly (outer plate, diaphragm, inner plate) by
turning the assembly counterclockwise using a 16/16" (2.38 cm) wrench on the outer
plate lugs. To disassemble the diaphragm assemblies, secure in a vise and turn the
outer plate counterclockwise using the 16/16" wrench.
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 at 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 nish). Install this sub assembly 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 nal torquing will
lock the diaphragm assemblies together. Place the rernaining outer chamber on the
open end and loosely tighten the bolts. Replace the manifold assemblies to square
the anges before nal tightening of the remaining bolts. the diaphragm assemblies
together. Place the rernaining outer chamber on the open end and loosely tighten the
bolts. Replace the manifold assemblies to square the anges before nal tightening
of the remaining bolts.
msb2dl3sm-REV0614 Model MSB2 Page 3
Page 6
REASSEMBLY
All procedures for reassembling the pump are the reverse of the previous
instructions with further instructions as shown:
1. The diaphragm assemblies are to be installed with the natural bulge outward or
toward the head of the center screw. Make sure both plates are installed with outer
radii against the diaphragm. After all components are in position in a vise and hand
tight, set a torque wrench for 480 inch pounds (40 ft. pounds) (54.23 Newton meters)
using a 1 1/16 (27mm) wrench or six pointed socket. After each diaphragm sub assembly has been completed, thread one assembly into the shaft (held near the middle
in a vise having soft jaws to protect the nish) making sure the stainless steel washer
is in place on the capscrew.
Make sure 1/4"-20 mounting screw has been removed and that the bumper (Item
#19 on drawing) is in place in the shaft.
Install this sub assembly into the pump and secure by placing the outer chamber
housing and capscrews on the end with the diaphragm. This will hold the assembly
in place while the opposite side is installed. Make sure the last diaphragm assembly
is torqued to 30 ft. lbs. (40.67 Newton meters) before placing the outer diaphragm
over the capscrews. If the holes in the diaphragm ange do not line up with the holes
in the chamber ange, turn the diaphragm assembly in the direction of tightening
to align the holes so that the capscrews can be inserted. This nal torquing of the
last diaphragm assembly will lock the two diaphragm assemblies together. Place
remaining outer chamber on the open end and tighten down the securing fasteners
gradually and evenly on both sides.
PILOT VALVE
The pilot valve assembly is accessed by removing the main air distribution valve
body from the pump and lifting the pilot valve body out of the intermediate housing.
Most problems with the pilot valve can be corrected by replacing the o-rings.
Always grease the spool prior to inserting it into the sleeve. If the sleeve is removed
from the body, reinsertion must be at the chamfered side. Grease the o-rings to slide
the sleeve into the valve body. Securely insert the retaining ring around the sleeve.
When reinserting the pilot valve, push both plungers (located inside the intermediate
bracket) out of the path of the pilot valve spool ends to avoid damage.
PILOT VALVE ACTUATOR
Bushings for the pilot valve actuators are threaded into the intermediate bracket
from the outside. The plunger may be removed for inspection or replacement. First
remove the air distribution valve body and the pilot valve body from the pump. The
plungers can be located by looking into the intermediate. It may be necessary to use
a ne piece of wire to pull them out. The bushing can be turned out through the inner chamber by removing the outer chamber assembly. Replace the bushings if pins
have bent.
TROUBLESHOOTING
PROBLEM: Pump cycles but will not pump. (Note: higher suction lifts require faster
cycling speed for priming.)
POSSIBLE CAUSES:
A. Air leak in suction line.
B. Excessive suction lift.
C. Check valve not seating properly.
D. Leakage at joint of suction manifold or elbow ange.
E. Suction line or strainer plugged.
F. Diaphragm ruptured.
Model MSB2 Page 4 msb2dl3sm-REV0614
Page 7
PROBLEM: Pump will not cycle. (Note: Always disconnect air supply to relieve air
pressure before disassembling any portion of pump.)
POSSIBLE CAUSES:
A. Discharge hose or line plugged, or discharge head requirement greater than air
supply pressure. (Disconnect discharge line to check.)
B. Spool in air distribution valve not shifting. (Remove end cap and check spool —
must slide freely.)
C. Diaphragm ruptured. (Air will escape out discharge line in this case.)
D. Blockage in diaphragm chamber preventing movement. (Shut off air supply and
reopen after pressure is relieved.)
PROBLEM: Uneven discharge ow. (Indicates one chamber not operating properly.)
POSSIBLE CAUSES:
A. Check valve not sealing properly in one chamber.
B. Diaphragm failure in one chamber.
C. Air leak at suction manifold joint or elbow ange one side.
For additional information, see the Warren Rupp Troubleshooting Guide.
WARRANTY:
This unit is guaranteed for a period of ve years against defective material and
workmanship.
Grounding The Pump
ONE EYELET IS FASTENED TO THE PUMP HARDWARE.
ONE EYELET IS INSTALLED TO A TRUE EARTH GROUND.
(REQUIRES A 5/16 OR 8MM MAXIMUM DIAMETER BOLT)
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.
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.
msb2dl3sm-REV0614 Model MSB2 Page 5
Page 8
IMPORTANT SAFETY
INFORMATION
IMPORTANT
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 purchaser
of the pump. It is the responsibility of the purchaser
to retain this manual for reference. Failure to comply
to retain this manual for reference. Failure to comply
with the recommendations stated in this manual
with the recommendations stated in this manual
will damage the pump, and void factory warranty.
will damage the pump, and void factory warranty.
Follow recommended torques stated in this manual.
gas will void the warranty.
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. Re-torque loose
fasteners to prevent leakage.
CAUTION
Pump not designed,
tested or certied to be
powered by compressed
natural gas. Powering
the pump with natural
WARNING
In the event of diaphragm
rupture, pumped material
may enter the air end of the
pump, and be discharged into
the atmosphere. If pumping
WARNING
Take action to prevent static
sparking. Fire or explosion
can result, especially when
handling ammable liquids.
The pump, piping, valves,
containers or other miscellaneous equipment
must be grounded. (See page 32)
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 uids, the pump
should always be flushed
clean prior to disassembly.
WARNING
Before doing any main-
tenance 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
Before maintenance or repair,
shut off the com-pressed air
line, bleed the pressure, and
disconnect the air line from
the pump. The discharge line
may be pressurized and must
be bled of its pressure.
WARNING
Use safe practices
when lifting
kg
RECYCLING
Many components of SANDPIPER® AODD pumps are made
of recyclable materials (see chart on page 8 for material
specications). We encourage pump users to recycle worn out parts
and pumps whenever possible, after any hazardous pumped uids
are thoroughly ushed.
Pump complies with EN809 Pumping Directive, Directive 2006/42/EC Machinery, according to
Annex VIII.
II 2GD T5
Model MSB2 Page 6 msb2dl3sm-REV0614
Pump complies with Directive 94/9/EC, EN13463-1
Equipment for use in Potentially Explosive Environments. For ref-
erence to the directive certicates visit: www.warrenrupp.com.
The Technical File No. AX1 is stored at KEMA, Notied Body
0344, under Document #203040000.
Page 9
PUMPING HAZARDOUS LIQUIDS
When a diaphragm fails, the pumped liquid
or fumes enter the air end of the pump.
Fumes are exhausted into the surrounding
environment. When pumping hazardous
or toxic materials, the exhaust air must
be piped to an appropriate area for safe
disposal. See illustration #1 at right.
This 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. See illustration #2 at right. Piping
used for the air exhaust must not be smaller
than 1" (2.54 cm) diameter. Reducing the
pipe size will restrict air ow and reduce
pump performance. 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. See illustration #3
at right.
CONVERTING THE PUMP FOR PIPING
THE EXHAUST AIR
The following steps are necessary to
convert the pump to pipe the exhaust air
away from the pump.
The air distribution valve has 3/4" NPT
threads for piped exhaust.
IMPORTANT INSTALLATION NOTE:
The manufacturer recommends installing a
exible conductive hose or connection
between the pump and any rigid plumbing.
This reduces stresses on the molded threads
of the air exhaust port. Failure to do so
may result in damage to the air distribution
valve body.
Any piping or hose connected to
the pump’s air exhaust port must be
conductive and physically supported.
Failure to support these connections could
also result in damage to the air distribution
valve body.
CONVERTED EXHAUST ILLUSTRATION
ILLUSTRATION #1
PUMP INSTALLATION AREA
1" DIAMETER AIR
EXHAUST PIPING
ILLUSTRATION #2
LIQUID
LEVEL
SUCTION
LINE
ILLUSTRATION #3
LIQUID
LEVEL
SAFE AIR
EXHAUST
DISPOSAL
AREA
MUFFLER
MUFFLER
1" DIAMETER AIR
EXHAUST PIPING
MUFFLER
1" DIAMETER AIR
EXHAUST PIPING
SUCTION
LINE
msb2dl3sm-REV0614 Model MSB2 Page 7
Page 10
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