A valve is installed between the safety valve and the silencer; which requirement is not met?
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Today, an external inspection was carried out on an industrial boiler (steam boiler), and it was found that a valve had been installed between the safety valve and the silencer (note: at the outlet of the safety valve). It is generally considered that this violates the regulations; I would like to ask gently – does this violate the provisions of the boiler regulations regarding the installation of safety valves?
No valves shall be installed at the outlet of the safety valve.
It is not advisable to install a stop valve between the safety valve and the container
There is no mandatory prohibition on installation; only a seal needs to be applied
It is stipulated in TSG ZF001-2006 Regulations on Safety Technical Inspection of Safety Valves
This post was last edited by zjq1962 on 2018-4-26 at 10:36. It can be installed, but the impact of the muffler on back pressure after installation must be taken into account.
No valves can be installed downstream of a safety valve; it’s quite easy to understand – if a valve is installed after the safety valve and that valve happens to close, the safety valve will no longer be able to perform its function of releasing pressure
The outlet of the boiler’s safety valve usually leads directly to the atmosphere; installing a valve there serves no purpose at all. So why install it? Is it just out of mere extravagance?
It should be possible to install it, but a lead seal must be added and the stop valve must remain fully open.
Violation of clause 11.1.5 of DL5054