Is there a problem with using an open-type valve cover with a safety valve wrench?
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I have a question: for safety valves with an open-type valve cover, when maintenance is carried out and the safety valve is manually opened using a wrench, will there be any risk of being scalded by hot steam leaking from the valve cover?
There should be no steam leakage at the valve cover
Don’t ordinary open-type valve covers have small holes in the spring chamber to allow fluid to drain to the atmosphere? Why won’t it be leaked?
Don’t ordinary open-type valve covers have small holes in the spring chamber to allow fluid to drain to the atmosphere? Why won’t it be leaked?
The small holes are there to release the air inside the spring chamber, preventing direct compression of the air and thus reducing resistance. They are not used to vent steam
Ordinary safety valves do not have seals at the opening of the valve disc and the guide sleeve, which allows some steam to escape from these openings; care should be taken to avoid this during operation. There is no medium leakage from the upper cover of the bellows-sealed safety valve.