PILOT VALVE
“4. Disassembly and assembly, Pilot valve”
Symptoms Major causes Remedies
The secondary pressure
is too low
•
The primary pressure is insufficient
• The spring is broken or worn out
• The clearance between the spool and the
casing is too large
•
Too much play in the handle
• Keep the sufficient primary pressure.
• Replace.
• Replace the spool and the casing assembly.
• Disassemble and assemble or replace.
The secondary pressure
is unstable
•
The sliding part is not smooth
• The tank line pressure fluctuates
• Air is present in the piping
• Correct or replace.
• Remove the faulty part(s) in the tank line.
• Bleed air by operating the valve several
times.
The
secondary pressure
is high
•
Pressure in the tank line is high
• The sliding part is not smooth
• Remove the faulty part in the tank line.
• Correct or replace.
PILOT VALVE
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