Sandpiper SET2-A Bedienungsanleitung PDF herunterladen (Seite 5)

520-117-000 5/99 Model SET2-A Type 3 Page 5

E. Check driver uid level.

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. Low ow rate as discharge pressure increases can also be a

sign of too little or no driver liquid in the driver chamber.

B. Check the vacuum at the pump suction. Capacity is reduced as vacuum increases.

Reduced ow rate due to starved suction will be evident when the 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 ow rate and slow cycling rate indicate restricted ow through the discharge

line. Low ow 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 conrmed 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. Using the Warren Rupp extractor/ dryer should

solve this problem.

E. Check driver uid level.

WARRANTY

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

workmanship.

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Sandpiper SET2-A Bedienungsanleitung Seite 5