Pneumatic butterfly valve in the powder system for use

Find out the reasons, the proposed solution: In the PLC program, will extend the vibration motor, as far as possible all the shock out of material after the closure of the valve; to 0:00 Scale alignment, all materials will be out after the show for the zero, this time issued by the PLC signal to close the valve; three eccentric butterfly valve will be replaced by a flexible double-eccentric hard-seal butterfly valve (rubber sealing can also be the center line butterfly valve, taking into account the material in the occasional large particles, rubber seal may be non-durable - if there is no particle of the powder material can be considered soft-sealed butterfly valve), because the three eccentric butterfly valve is a valve seat sealing surface of the ramp, that is, sealing surface, so materials can easily accumulate in the sealing surface can not be quickly discharged, and single or double eccentric butterfly valve eccentric no such defects, even if it is sealed the surface of materials, but also when the valve closure of the scratch-off valve plate, thus ensuring a good seal, and seal durable surface. After such a transformation, this problem never happened.



In such a system, need to take into account other factors, such as: materials should not be allowed to put a small car from above directly into the valve when the valve plate (which will also impact the closure of the valve can not close), and materials also need to hydrostatic pressure does not exceed the design of butterfly valves for pneumatic pressure, and so on.



Control valves and manual valves ordinary difference lies in the fact, you can not put it as an isolated view of the components, but must put it as part of the automatic control system to consider the use of control valves, many of the issues, not Selection and configuration, but because of the user's understanding of control valves, control valves, resulting in inadequate control system and fail to debug with the good. As long as the key to understanding the problem, the correct selection of valves and debugging phase in the system control valve to debug, and will be able to significantly reduce the failure rate, so that long-term stability of automatic control system operation.

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