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Understand the relationship between the structure and performance of the cut-off valve. The performance characteristics of the cut-off valve are short spool stroke, strong flow capacity, quick commutation, easy to design into a large-diameter reversing valve with compact structure; sliding seal The surface is small and the leakage loss is small, so the ability to resist pollution and dust is strong, and the filtration accuracy of the gas source is low.

Since the spool is always subjected to the pressure of the compressed air, the sealing performance of the shut-off valve is good, but in the case of high pressure and large flow, the required commutation force is large, and the impact force is also large, which is not suitable for use. High sensitivity.