SANDPIPER PB2-A - Manual

IMPORTANT
Read these instructions completely,
before installation and start-up. It is the
responsibility of the purchaser to retain
this manual for reference. Failure to
comply with the recommendations
stated in this manual will damage the
pump, and void factory warranty.
HAZARD WARNING
POSSIBLE EXPLOSION HAZARD can
result if 1, 1, 1,-Trichloroethane,
Methylene Chloride or other
Halogenated Hydrocarbon solvents are
used in pressurized fluid systems
having Aluminum or Galvanized wetted
parts. Death, serious bodily injury and/
or property damage could result.
Consult with the factory if you have
questions concerning Halogenated
Hydrocarbon solvents.
DANGER
Before doing any maintenance on the
pump, be certain all pressure is com-
pletely vented from the pump, suction,
discharge, piping, and all other open-
ings 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 at all
times in the vicinity of the pump. Failure
to follow these recommendations may
result in serious injury or death.
WARREN RUPP, INC. A Unit of IDEX Corporation • P.O. Box 1568 • Mansfield, Ohio 44901-1568 USA • (419) 524-8388 • Fax (419) 522-7867
520-130-000 2/97 Model PB1½-A & PB2-A Page 1
SERVICE AND OPERATING MANUAL
Models PB1 1 /
2
-A & PB2-A
Type 3
Fig. 1 Air inlet
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
drawing for your specific model when installing, disassembling or servicing your
pump.
PRINCIPLE OF PUMP OPERATION
This ball type 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 check valves
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.
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 15 feet (4.5 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 100 psi (7.0 bar). Connect the pump air inlet
(Fig. 1) 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
1 /
2
" (12.7mm) in diameter between pump and piping to eliminate strain to
pipes. The weight of the air supply line and of the filter must be supported by some
means other than the air valve cap. Failure to provide support may result in damage
to the pump. A pressure regulating valve should be installed to prevent pressure from
exceeding recommended limits.
®