SANDPIPER MSA2-C User Manual

SERVICE AND OPERATING MANUAL

I M2 c T5
II 2GD T5

Models MSA2 MSA2-B MSA2-C

II 2G c T5
II 3/2Gc T5
II 2Dc T100°

c

Mine/Construction-Duty

Table of Contents

Principle of Operation ............................................................................................ 1

Installation and Start-Up ........................................................................................ 1

Air Supply .............................................................................................................. 1

Air Inlet & Priming .................................................................................................. 2

Air Valve Lubrication .............................................................................................. 2

ESADS+Plus

Air Exhaust ............................................................................................................ 3

Between Uses ....................................................................................................... 3

Check Valve Servicing ........................................................................................... 3

Diaphragm Servicing ............................................................................................. 3

Reassembly ........................................................................................................... 4

®

:

Externally Serviceable Air Distribution System ................................2

Type 5

Pilot Valve .............................................................................................................. 4

Pilot Valve Actuator ................................................................................................ 4

Service Instructions: Troubleshooting ................................................................4-5

Grounding The Pump ............................................................................................ 5

Recycling ............................................................................................................... 6

Important Safety Information ................................................................................. 6

Material Codes ...................................................................................................... 7

Composite Repair Parts List MSA2 ....................................................................... 8

Composite Repair Drawing MSA2 ......................................................................... 9

Composite Repair Parts List MSA2-B (with Roll Cage) ....................................... 10

Composite Repair Drawing MSA2-B (with Roll Cage)......................................... 11

Composite Repair Parts List MSA2-C (with Skid Base) ...................................... 12

Composite Repair Drawing MSA2-C (with Skid Base) ........................................ 13

CE Declaration of Conformity Machinery ............................................................ 14

Warren Rupp® A Unit of IDEX Corporation • P.O. Box 1568, Manseld, Ohio 44902 USA

Models MSA2 MSA2-B MSA2-C

Telephone [phone] • Fax [phone] • warrenrupp.com

©Copyright 2014 IDEX AODD, Inc. All rights reserved.

SERVICE AND OPERATING MANUAL

I M2 c T5
II 2GD T5

Models MSA2 MSA2-B MSA2-C

II 2G c T5
II 3/2Gc T5
II 2Dc T100°

c

Mine/Construction-Duty

PRINCIPLE OF PUMP OPERATION

This ap swing 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 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.

Type 5

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 20 feet (6.096 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 sufcient 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.

msa2dl5sm-rev0614 Models MSA2 MSA2-B MSA2-C Page 1

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 efcient 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.

Models MSA2 MSA2-B MSA2-C Page 2 msa2dl5sm-rev0614

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

Valve inspection requires removal of (4) 3/8" hex nuts. On the suction side the ange,
when removed, carries the valve and seat as an assembly. On the discharge side,
the valve and seat will stay with the diaphragm housing. Visual inspection and clean­ing is possible. If parts are to be replaced, remove the self locking nuts and all parts
are accessible.

DIAPHRAGM SERVICING

Diaphragms can be inspected or the diaphragm assembly removed without

removing the suction and discharge anges. Remove (8) nuts around the chamber
ange, and the housing assembly will pull off. Check valves can be inspected for

proper seating at this point as well as the diaphragm. Use care to keep foreign mat­ter from behind the diaphragm. The opposite diaphragm may be inspected by the
same procedure. If either diaphragm has to be replaced, follow closely these steps:
Pull the outer diameter of one diaphragm off the (8) capscrews. NOTE: One side
only! On the free diaphragm assembly, use a 3/8" allen wrench to turn the as­sembly (diaphragm, plates and screw) loose from the shaft. Once the assembly
has turned, it will turn out by hand by use of the diaphragm. Now the opposite dia­phragm assembly and the drive shaft will pull free from the capscrews and pump
intermediate assembly. The interior components consisting of sleeve bearings, rod
seals, and pilot valve actuator bushings are now accessible for service if required.
Hold the shaft in a clamping device making sure to protect surface of shaft so as not to
scratch or mar it in any way. The diaphragm assembly will turn loose. To disassemble
the components, turn a 1/4"-20 capscrew by hand into the tapped hole in the inner
plate. This keeps the plate from turning while the socket head capscrew is removed.
To do this, place assembly in a vise so the two protruding ends of screws are loose
in the vise jaws (about 3/4" apart). Turn the center screw loose from the back plate
and the assembly will come apart.

msa2dl5sm-rev0614 Models MSA2 MSA2-B MSA2-C Page 3