Solenoid valve selection
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An electromagnetic valve is used at the rear end of the torch booster fan; since the fan operates at a pressure of 9.8 kPa, the manufacturer stated that pilot-operated electromagnetic valves cannot be used. However, even straight-through electromagnetic valves do not work properly in this case； The solenoid valve is of the straight-through type, with a DN125 size; its structural appearance is very similar to that of a globe valve. In actual operation, the fan trips after running for 1-2 minutes ； The fan’s flow rate is 1000 m3/h ； Tests have shown that removing the solenoid valve prevents the fan from tripping during operation ； Upon disassembling the solenoid valve, it was found that the internal space for flow passage was quite small; it is suspected that the high internal flow resistance of the solenoid valve caused the fan to operate under conditions of restricted airflow, which is what led to the tripping ； However, after asking the manufacturer, their opinion is that there should be no resistance under operating conditions of 9.8 kPa and 1000 m3/h; they suspect it might be an electrical issue, even though the fan operates normally once the solenoid valve is removed. I’m now confused – is it really possible for solenoid valves of this type to have excessive resistance? ? Are there any other solenoid valves that can be used under such operating conditions? Please help! ! ! ! ! ! ! ! ! !
For a valve as large as DN125, the solenoid valve is a component that acts as a control switch on the valve; it is not the valve itself. Globe valves have a small flow area, while valves with larger flow areas include gate valves, ball valves, and butterfly valves.
Yes! Solenoid valves are primarily used for control purposes; electric valves are still needed for the actual valves.
Why not use a pneumatic butterfly valve? The original poster might want to consider that
This solenoid valve is a bit large, which likely results in high flow resistance; it is of the shut-off valve type. Since a solenoid valve is being used, fast switching should be possible; otherwise, a pneumatic shut-off valve could be considered