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調節閥的彈簧剛度不足，調節閥輸出信號不穩定而急劇襯氟襯膠閥變動易引起調節閥振蕩。還有說選閥的頻率與系統頻率相同或管道、基座劇烈振動，使調節閥隨之振動。

The spring stiffness of the regulating valve is insufficient, the output signal of the regulating valve is unstable, and the sudden change of the fluorine lined rubber valve easily causes the oscillation of the regulating valve. It is also said that the frequency of the selected valve is the same as the frequency of the system or the severe vibration of the pipeline and base makes the control valve vibrate.

選型不當，調節閥工作在小開度存在著急劇的流阻、流速、壓力的變化，當超過閥剛度，穩定性變差，嚴重時產生振蕩。

There is a sharp change of flow resistance, flow velocity and pressure in the small opening of the regulating valve. When the valve stiffness is more than the valve, the stability becomes worse and the oscillation occurs when the valve is serious.

冷庫調節閥經常出現的問題是卡堵，常出現在新投運系統和大修投運初期，由于管道內焊渣、鐵銹等在節流口、導向部位造成堵塞使介質流通不暢，或調節閥檢修中填料過緊，造成摩擦力增大，導致小信號不動作大信號動作過頭的現象。

The problem that often appears in the cold storage valve is blocking, often appearing in the new transportation system and the early stage of overhaul and transportation. Because of the blockage in the throttle and the guiding position, the circulation of the medium in the throttle, the rust and so on in the pipe is not smooth, or the packing of the regulating valve is too tight in the overhaul of the valve, resulting in the increase of the friction force, which causes the small signal not to act big signal. The phenomenon of the head.

調節閥泄漏，閥桿長短不適。氣開閥，閥桿太長閥桿向上的(或向下)的距離不夠，造成閥芯和蝶閥閥座之間有空隙，不能充分接觸，導致關不嚴而泄漏。同樣氣關閥閥桿太短，導致閥芯和閥座之間有空隙，不能充分接觸，導致關不嚴而泄漏。

Regulating valve leakage, valve stem length and short discomfort. Air opening valve, the valve stem too long stem up (or down) distance is not enough, causing the valve seat and valve seat gap between the seat, not fully contact, causing tight and leakage. Similarly, the gas valve stem is too short, resulting in gaps between the spool and the valve seat, which can not be fully contacted, resulting in serious leakage.

管道、基座劇烈震動通過增加支撐消除振動干擾;選閥的頻率與系統頻率相同，則更換不同結構的閥。

The vibration of pipeline and base can be eliminated by increasing support, and the valve with different structure will be replaced if the frequency of the selected valve is the same as the frequency of the system.

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We are willing to welcome the eight party guests with the best sense of service, sincerely cooperate with friends from all walks of life at home and abroad, and create a bright future together. Welcome everyone to vi