Does an electric valve need a manual valve for bypassing?
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Does the electric valve in the heat pump circuit need to be bypassed by a manual valve?
It can be set~~~but none are set by default~~~If one electric valve is used, it takes up space
Without a bypass manual valve, the electric valve must be equipped with its own handwheel.
If possible, one can be installed; in the event of a failure of the electric valve, it can be controlled via a backup line.
It’s equivalent to having one in use and one as a backup for emergency use, right?
Generally, for newly installed devices, electric valves are equipped with a handwheel for adjustment
Electric valves and three-way valves must be equipped with a handwheel mechanism – (petroleum + chemical industries)
Electric control valves can be equipped with bypasses, and there are several reasons for this: firstly, it serves as an emergency control mechanism in case the electric valve malfunctions； Second, the electric valve can be removed from the pipeline for maintenance without shutting down operations ； Third, if the torque of the electric valve is insufficient, the bypass valve can be used as a balancing valve during startup. It is advisable to use a globe valve with regulating function as the bypass valve, with a diameter identical to that of the electric valve. If there are no shut-off valves before and after the electric valve, only a bypass is installed, then the machine must be stopped when removing the electric valve; sometimes it is also necessary to drain and relieve the pressure of the medium in the pipeline.
Add one more to prevent electrical failures and ensure material transport through bypassing.