SANDPIPER EB1-SM User Manual

Model eb1-sm, Type 3, Service and operating manual

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520-079-000 9/00

Model EB1-SM Type 3 Page 1

SERVICE AND OPERATING MANUAL

PRINCIPLE OF OPERATION

This ball 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 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.

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. Use of a
Warren Rupp Filter/Regulator in the air line is recommended.

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 flow as desired. If opening the valve increases
cycling rate, but does not increase flow rate, cavitation has occurred, and the valve
should be closed slightly.

Type 3

Model EB1-SM

Air inlet

IMPORTANT

Read these instructions completely, be-
fore installation and start-up. It is the
responsibility of the purchaser to retain
this manual for reference. Failure to com-
ply with the recommendations stated in
this manual will damage the pump, and
void factory warranty.

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.

BEFORE OPERATION

Before pump operation, inspect all
gasketed fasteners for looseness caused
by gasket creep. Retorque loose fasten-
ers to prevent leakage. Follow recom-
mended torques stated in the card at-
tached to the new pump.

HAZARD WARNING

POSSIBLE EXPLOSION HAZARD can
result if 1, 1, 1,-Trichloroethane, Methyl-
ene Chloride or other Halogenated Hy-
drocarbon solvents are used in pressur-
ized 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 Haloge-
nated Hydrocarbon solvents.

®

WARREN RUPP

®

, INC., A Unit of IDEX Corporation • P.O. Box 1568 • Mansfield, Ohio 44901-1568 USA • (419) 524-8388 Fax (419) 522-7867 • www.warrenrupp.com

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