Problems with electric valves
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Can electric switch valves be used as quick shut-off valves? Valve diameter DN80
Those that can use electric actuators. If the medium is flammable, explosive, and highly permeable, a pneumatic actuator should be used.
DN80 should be about right; it’s hard to say if the pipe diameter is larger, as quick-stop valves are generally two-position
How fast is required? There are also electric actuators with fast opening and closing speeds; it depends on which option is suitable for your specific application.
For the DN80 quick shut-off valve, a pneumatic actuator can be selected. Electro-hydraulic actuator selected for large bore and high torque.
That’s not possible; electric valves open and close slowly. If rapid shutdown is required, hydraulic valves can be used
They are usually pneumatic two-position valves.
As for cut-off, we generally make the pneumatic shutdown time faster than that of the electric type
It mainly depends on the time requirement; the low-torque electric actuators we use can complete the task in as fast as 7.5 seconds. Those using hydraulic or pneumatic single-acting (spring-type) types can achieve <1.5 seconds
Hydraulic systems require a hydraulic power source, which is inconvenient and costly.
In terms of cutting off flow, butterfly valves and ball valves perform better than control valves; as the name implies, control valves are designed for regulation rather than cutting off flow, so they are not very suitable for this purpose