Regarding the steam leakage issue from the drain port of the safety valve on the 9.8 MPa boiler header
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I would like to ask the experts: On the boiler steam header, there are spring-loaded safety valves of type A68Y-P54 10V P54 10V. There is a drain port at the bottom of these valves (indicated by the red circle in the attached diagram). Is it necessary to seal this drain port? If it isn’t sealed, steam will leak out from here, making it difficult to maintain cleanliness at the site. I appreciate your advice; thank you in advance.
The bellows of the safety valve are damaged, resulting in a poor seal.
Since it’s called a drain port, it certainly can’t be blocked; it’s meant to allow the condensate to flow out. Logically, a steam trap or drain port is closed when there’s no water in it.
This safety valve is a spring-loaded fully open safety valve； The boiler has been in continuous operation for a year now; during that time the safety valve has activated, so the valve may not return to its proper position fully, resulting in some steam leakage. All of this steam escapes from here. If it gets blocked, wouldn’t it just escape through the exhaust port?
It is best to take over the drainage separately and direct it to the gutter
During installation, a pipe should be led outside to a safe location at an appropriate slope to facilitate drainage
It’s better to address the issue at its root, by dealing with the problem of the safety valve returning to its normal position