Sandpiper HDF2-A Service And Operating Manual

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 flap 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 flap-type
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 suc-
tion 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
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 20 feet (6.096 meters)
or less. For suction lifts exceeding 20 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.
WARREN RUPP, INC. A Unit of IDEX Corporation P.O. Box 1568 Mansfield, Ohio 44901-1568 USA (419) 524-8388 Fax (419) 522-7867
hdf2dl5sm-REV0208
SERVICE AND OPERATING MANUAL
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I M2 c T5
II 2GD T5
Model HDF2-A
Type 5
IMPORTANT
Read these safety
w a r n i n g s
instructions in this
manual completely,
before installation and start-up of the pump.
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.
CAUTION
B e f o r e
operation, inspect all
gasketed fasteners
for looseness caused
by gasket creep. Re-
torque loose fasteners to prevent leakage.
Follow recommended torques stated in
this manual.
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
I n t h e e v e n t o f
diaphragm rupture,
pumped material may
enter the air end of
the pump, and be
discharged into the atmosphere. The air
exhaust must be piped to an appropriate
area for safe disposition.
WARNING
Take action to prevent
static sparking. Fire
o r e x p l o s i o n c a n
r e s u l t , e s p e c i a l ly
w h e n h a n d l i n g
flammable liquids.
T h e p u m p , p i p i n g , v a l v e s ,
containers or other miscellaneous
e q u i p m e n t m u s t b e g r o u n d e d .
Model HDF2-A Page 1 Rev B
a n d
p u m p