SANDPIPER MSB25 - Manual (Page 6)

msb1dl5sm-rev0813 Models MSB1 & MSB25 Page 4
PLEASE NOTE!
The photos shown in this manual are for general instruction only. Your specific
model may not be shown. Always refer to the parts list and exploded view draw-
ing for your specific model when installing, disassembling or servicing your pump.
PRINCIPLE OF PUMP OPERATION
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) is
not recommended. For applications with higher suction heads, consult the factory.
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 ap-
plied 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.
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 ® surge suppressor is recommended to further
reduce pulsation in flow. Tighten all fasteners before pump startup.
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 10-15 feet (3.05-4.57
meters) or less. For suction lifts exceeding 15 feet of liquid, fill the chambers with
liquid prior to priming.
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.
Model MSB1 Type 5
Model MSB25 Type 5
II 2GD T5
See pages 2, 18 & 19
for ATEX ratings
SERVICE & OPERATING MANUAL
Original Instructions