VAL
S
TEAM
ADCA
Produced in accordance with Sound Engineering Practices of the European PED - Pressure Equipment Directive.
IMI PS130.08 E 00.22
20
9.3. Tightening torques
POS. Nº
DESIGNATION
TORQUE (Nm)
2
Cover
150
3
Bottom cover
35
10. TROUBLESHOOTING
Before applying any corrective measure, refer to section 1 – Safety information.
If the malfunction cannot be solved with the help of the following table, contact VALSTEAM
ADCA or its representative.
Malfunction
Possible cause
Corrective measure
Leakage between seat
and plug before the
adjusted set pressure has
been reached.
Seat and/or plug is worn or damaged.
•
Replace plug assembly - see sections 9.2.
•
Inspect seat conditions and if damaged
contact VALSTEAM ADCA.
Foreign matter is stuck between seat
and plug.
•
Remove foreign matter and replace plug if
necessary - see sections 9.2.
•
Consider installing a filter upstream of the
regulator.
Bypass valve is leaking.
•
Check, clean and replace the bypass valve
if necessary.
The regulator is blocked
(no flow allowed through
the regulator).
The valve head (6) is stuck to the seat.
•
Replace plug assembly - see sections 9.2.
The set pressure has been accidentaly
altered.
•
Readjust set pressure.
Set pressure cannot be
reached.
The adjustment spring regulating range
is incorrect.
•
Replace the adjustment spring.
The inlet upstream pressure to the
regulator is not high enough.
•
Ensure that the upstream pressure to
the regulator is equal or greater than the
required set pressure at minimum and
maximum consumption scenarios.
Leakage between body
and cover.
The lower diaphragm (15) is damaged.
•
Replace damaged diaphragms – see
sections 9.2.
Cover (2) tightening torque is too low.
•
Tighten cover (2) with the recommended
torque – see sections 9.3 – Tightening
torques.
The regulator is hunting
or chattering.
The flow rate through the regulator is
too low. The regulator is oversized.
•
Check valve sizing and if necessary, install
a smaller regulator.
•
Contact VALSTEAM ADCA.
The reducing ratio is too high.
•
Install a second regulator in series (two-
stage reduction).
•
Contact VALSTEAM ADCA.
The upstream pressure
rises too much when
flow rate reduces to
a static condition (no
consumption).
Flow rate through the regulator is too
high.
•
When occurring during start-up, allow
downstream system to pressurize slowly to
prevent demage to the regulator.
•
Check valve sizing and if necessary, install
a larger regulator or a second regulator in
parallel.
•
Contact VALSTEAM ADCA.
