Warranty – SANDPIPER EB3-SM User Manual

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® Warren Rupp, SandPIPER, and Tranquilizer are registered tradenames of Warren Rupp, Inc.

® Neverseize is a registered tradename of Loctite.

Printed in U.S.A.

RECOMMENDED WARREN RUPP ACCESSORIES

TO MAXIMIZE PUMP PERFORMANCE:

•

Tranquilizer

Surge Suppressor: For nearly pulse-free flow.

•

Warren Rupp Filter/Regulator: For modular installation and service
convenience.

•

Warren Rupp Speed Control: For manual or programmable process
control. Manual adjustment or 4-20mA reception.

For more detailed information on these accessories,

contact your local Warren Rupp Factory-Authorized Distributor,

or Warren Rupp corporate headquarters.

2. Pump cycles but will not pump
A. Suction side of pump pulling in air. Check the suction line for air leaks and be sure
that the end of the suction line is submerged. Check flange bolting. Check valve
flanges and manifold to chamber flange joints.
B. Make certain the suction line or strainer is not plugged. Restriction at the suction
is indicated by a high vacuum reading when a vacuum gauge is installed in the suction
line.
C. Check valves may not be seating properly. To check, remove the suction line and
cover the suction port with your hand. If the unit does not pull a good suction (vacuum),
the check valves should be inspected for proper seating.
D. Static suction lift may be too high. Priming can be improved by elevating the suction
and discharge lines higher than the check valves and pouring liquid into the unit
through the suction inlet. When priming at high suction lifts or with long suction lines
operate the pump at maximum cycle rate.
3. Low performance
A. Capacity is reduced as the discharge pressure increases, as indicated on the
performance curve. Performance capability varies with available inlet air supply.
Check air pressure at the pump inlet when the pump is operating to make certain that
adequate air supply is maintained.
B. Check vacuum at the pump suction. Capacity is reduced as vacuum increases.
Reduced flow rate due to starved suction will be evident when cycle rate can be varied
without change in capacity. This condition will be more prevalent when pumping
viscous liquids. When pumping thick, heavy materials the suction line must be kept
as large in diameter and as short as possible, to keep suction loss minimal.
C. Low flow rate and slow cycling rate indicate restricted flow through the discharge
line. Low flow rate and fast cycling rate indicate restriction in the suction line or air
leakage into suction.
D. Unstable cycling indicates improper check valve seating on one chamber. This
condition is confirmed when unstable cycling repeats consistently on alternate
exhausts. Cycling that is not consistently unstable may indicate partial exhaust
restriction due to freezing and thawing of exhaust air. Use of an anti-freeze lubricant
in an air line lubricator should solve this problem.

For additional information, see the Warren Rupp Troubleshooting Guide.

WARRANTY

This unit is guaranteed for a period of five years against defective material and

workmanship. Failure to comply with the recommendations stated in this manual voids
all factory warranty.

520-057-000

8/00

Model EB3-SM

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