Can a regulated valve with interlock be equipped with a hand valve?
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Can an interlocked control valve be equipped with a hand valve?
It’s standard equipment; it must be brought along. Once the actuator of the note fails, it can continue to operate without shutting down production. Once it’s fixed, you can switch to automatic mode.
Of course, it’s allowed—just when needed!
Hand valves are allowed, but bypasses are not permitted.
Hand valves can certainly be included – if you have the money, there’s no limit to the number of hand valves
Oh, is that a shut-off valve with interlock that doesn’t allow a handwheel?
There is a problem with the expression: does a control valve equipped with interlocking allow the use of a handwheel?
If you are referring to the manual valves located before and after the control valve, used to isolate it, then they are necessary in order to isolate the control valve when needed； If you are referring to the handwheel used on valves to manually adjust their position, then it cannot be included. According to regulations, valves equipped with interlocks must not be manually operated on-site at will; if the valve manufacturer has provided such a handwheel, it is best to remove it or mechanically lock it in place.
I completely agree with you; such a practice is indeed not allowed when installing interlock valves abroad, as foreign products are insured, and in the event of a failure caused by the valve itself, the insurance company needs to verify the claim!