Safety relief valves
33501, 33502, 33503, 33521, 33601, 33602, 33603, 33621
Trouble shooting
BA(k)_033501.06_EN
2023-07-27 Albert Handtmann Armaturenfabrik GmbH & Co. KG 23 / 30
9 Trouble shooting
Danger - Dangers of electric current!
During assembly work, the power supply may malfunction.
– A regular inspection of the electrical components must be carried out by a
qualified electrician.
• All faults must be checked and repaired immediately.
• The work required may only be carried out by qualified personnel in compliance with
the safety instructions.
Safety relief valve does not open
• Lift valve manually and clean
valve seat
• Pressure not sufficient for
opening.
• Check the pressure setting
• Lifting/opening process is blocked
• Check the mobility of the valve
rod (lift valve manually)
• Compressed air supply not
sufficient.
• Compressed air with a pressure
of at least 5 bar should be
applied.
• Check the compressed air hose.
• Malfunction of solenoid valve or
electrical control faulty.
• Check the solenoid valve.
Safety relief valve does not close
• Lifting nut is screwed against the
housing
• Screw the lifting nut upwards
• Solid body in the valve seat out
of line.
• Clean valve housing and seat
• Actuator spring blocked or
broken
• The defective actuator may only
be repaired by the manufacturer
• Pressure bleeding defective
• Sealing defective
• Check the solenoid valve
• Change sealings
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