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upr000210 289

upr000210 289
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Digital ID

upr000210-289

Permalink

http://n2t.net/ark:/62930/d17m06c8h
Details

Member of

Las Vegas, Nevada - water facilities additions, replacements and renewals maintenance (2 of 2)

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Digital Provenance

Digitized materials: physical originals can be viewed in Special Collections and Archives reading room

Publisher

University of Nevada, Las Vegas. Libraries

GENERAL INSTRUCTIONS FOR LOCATING TROUBLE OF CENTRIFUGAL PUMPS NO WATER DELIVERED: (a) Pump not primed. ** (b) Speed too low. (c) Discharge head too high. (d ) Suction lift higher than for which pump is designed. (e) Impeller completely plugged up. (f) Wrong direction of rotation. ** (b) Speed too low. (c ) Discharge head higher than anticipated. (d) Suction lift too high. Check with gauges. Check for clogged suction line or screen. (e) Impeller partially plugged up. if) Not enough suction head for hot water. (g) Mechanical defects: (d) Impeller diameter too small. ** When direct connected to electric motors, check up whether NOT ENOUGH WATER DELIVERED: a Air leaks in suction or stuffing boxes. Wearing rings worn. Impeller damaged. Casing packing defective. Foot valve too small. Foot valve or suction opening not submerged deep enough. NOT ENOUGH PRESSURE: ** (a) Speed too low. (b) Air in water. (c) Mechanical defects: Wearing rings worn. Impeller damaged. Casing packing defective. motor is across the line and receives full voltage. When direct connected to steam turbines, make sure that turbine receives full steam pressure. PUMP WORKS FOR A WHILE AND THEN LOSES SUCTION: Leaky suction line. Waterseal plugged. Suction lift too high. Air or gases in liquid. PUMP TAKES TOO MUCH POWER: Speed too high. Head lower than rating, pumps too much water. Specific gravity or viscosity too high. Mechanical defects: Shaft bent. Rotating element bilids. Stuffing boxes too tight. Wearing rings worn. Casing packing defective. General Instr. Page 7