POOR PUMPING SPEED (Capacity)
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PROBABLE CAUSE
I
SYMPTOMS AND SOLUTIONS
Clogged inlet filter.
Replace inlet filter element.
[ntake line is narrow or contains restrictions or
Re-plumb sections of line that are narrow or
debris.
sections with sharp turns. Maintain pump inlet
diameter as far into the process as possible.
Check for obstructions in plumbing.
l%oblem in lubrication system. Check for adequate fluid flow rate and for
restrictions in fluid piping.
Excessive back pressure/separator clogged.
Replace separator element-keep exhaust at
atmospheric pressure.
Low fluid level.
Fill fluid resewoir to proper level.
Condensation or contamination in fluid.
Replace pump fluid.
Pump is cold.
Allow adequate warm-up time for pump to
reach operating temperature.
Shaft seal leak.
\Replace shaft seal,
Leak.
Leak check system and compare to original rate
of rise pressure test. Look for damaged
gaskets and leaks in checkhsolation valves.
Check for leaks in inlet valve, and piping to
airend.
Vapor load being generated.
Possible leak in water cooling jacket or water
piping in vacuum system. Leak check.
Materials of construction.
Materials not compatible with vacuum service.
Observe all vacuum engineering conventions.
temperature of system or process gas
Increases in temperature translate into ACFM
increasing.
load. Keep temperatures constant.
[nlet valve not opening fidly.
Correct the situation in accordance with the
instructions in “Inlet Valve Not Opening or
Closing in Relation to Demand” section of the
trouble-shooting guide.
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Page 58
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