Hansa HD-KSV, Instruction Book

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Safety Valves Type KSV/ÜSV and HD-KSV/HD-ÜSV
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8 Further information
See Clause 8 on page 27.
If you find out that an impermissibly high pressure has built up in the piping system or
a valve has operated, shut the system down immediately and inspect it.
If the valve has the right size and has operated with good reason, remove the source of
the fault in the system.
Failure to observe this warning note may result in damage to the safety valve and,
in turn, put the user at risk.
Pressure relief and overflow valves protect the piping system against excessive pressure.
It is expressly forbidden to:
➢
Unscrew a safety or overflow valve or loosen the screw connection during
operation;
➢
Unscrew the cap of the safety valve which is locked by a lead seal.
Failure to observe this warning note may result in damage to the safety valve and,
in turn, put the user at risk.
If it is found that a closed safety valve is leaking:
The seat of a safety valve or overflow valve may possibly be damaged. The protective func-
tion of the valve may still be unaffected but the valve should be replaced immediately.
7 Help in case of malfunctions
When correcting faults, observe Clause 2 <Safety instructions>.
Dirt in the pipe can damage the safety valve seat.
The special instructions on cleanliness during installation given in Clause 4 <Installation
in the piping> must also be observed for maintenance and repair work.
Type of fault Remedy
If you find out that an impermissibly high pressure has built up in the piping
system or a valve has operated, shut the system down immediately and inspect
it.
If the safety valve has the right size and has operated with good reason, remove
the source of the fault in the system.
Retighten the screw connection in accordance with the torque specified in 4.2;
generally replace the copper sealing ring.
Remove and replace the pressure relief valve at the next opportunity. Observe
the instructions in 2.3 <Particular hazards> and 4.2 <Working steps>.
Shut down the system at once and
immediately remove
and replace the
safety valve. Observe the instructions in 2.3 <Particular hazards> and 4.2
<Working steps>.
Excessive pres-
sure build-up
Leakage at safety
valve inlet
Leakage at safety
valve seat
Valve does not
operate at its
operating pressure
Other
malfunctions
HANSA_IP_Bedienanl_A_015_887 07-2016 40S 123%_180111 11.01.18 14:19 Seite 22