Armstrong GP-2000R Anweisungen für Installation, Betrieb und Wartung - Seite 3

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Problem
Main diaphragm is damaged.
Orifice of tee fitting is clogged.
Adjustment
Screen is clogged
is
impossible
Sensing pipe is clogged.
Pressure guage is malfunctioning.
Incorrect pressure is being used.
Check for foreign matter stuck to main valve and
main seat, or for scratches on these components.
Excessive
Check for foreign matter stuck to pilot valve and
pilot valve seat, or for scratches on these
leakage.
components.
Bellows seal is damaged.
Fluid leaks from by-pass valve.
Nominal size is too small for the application.
The amount of steam released (amount used) at
the regulating valve's outlet side is insufficient.
Inlet pressure
Too much condensate collecting prior to the
increases
regualtor.
beyond the
The flow of steam is being obstructed at the outlet
prescribed
pipe of the regulating valve.
level.
The pipe diameter for outlet side is too small.
Strainer placed in front of regulating valve is
clogged.
Movement of pilot valve is not smooth.
Flow at the connection of the sensing pipe
fluctuates excessively.
Excessive error
Too much condensate collecting prior to the
regulator.
Drain is present in the sensing pipe.

Troubleshooting Guide

Cause
3
Solution
Remove pipe C (36) and open the by-pass valve. If fluid
runs out from the elbow replace main diaphragm.
Remove and clean it or replace.
Remove and clean it or replace.
Remove and clean it or replace.
Replace the pressure gauge.
Correct the pressure.
Remove pipe A (34). If fluid runs out from tee when
pressure is applied to the inlet side of the regulating valve at
a pressure below the setting level, clean the main valve and
main valve seat. When any scratches are identified, lap the
main valve and main valve seat.
If fluid runs out from joint when pressure is applied to inlet,
remove the pilot valve assembly to clean or replace it.
Remove the joint (to pilot body). If fluid runs out from the
joint when it is supplied from pressure sensing port, replace
the bellows seal.
Repair or replace it.
Change to an appropriate nominal size.
Increase the amount of released steam.
Install a steam trap.
Check the pipe diameter and the isolation valve to be sure it
is open.
Make a pipe diameter selection that will keep flow velocity
less than 6000 ft/min.
Disassemble and clean it.
Remove and clean or replace.
Examine the connections.
Install a steam trap.
Connect the sensing pipe in upward slope to the regulating
valve.