Ventilation pipeline is an indispensable ventilation equipment in building engineering. It provides convenient and effective ventilation for buildings, so that the air in buildings can maintain circulation. However, ventilation pipes sometimes have problems, such as control valves. Ventilation pipe manufacturer introduced two common problems and solutions of control valve.

　　一個是交通擁堵。不銹鋼調節(jié)閥具有較高的調節(jié)精度，一般為直線調節(jié)閥，閥體結構多為倒S型，存在循環(huán)死角，容易產生堵塞現象。特別是在新安裝的管道或大修運行的初期，由于此時管道內有大量的焊渣、鐵銹等雜物，很容易造成節(jié)流孔及導向位置介質堵塞。

　　One is traffic jam. Stainless steel control valves have high regulation accuracy, generally linear control valves, valve body structure is mostly inverted S-shaped, there is a cycle dead angle, prone to blockage. Especially in the initial stage of newly installed pipeline or overhaul operation, because there are a large number of welding slag, rust and other impurities in the pipeline at this time, it is easy to cause throttle hole and guide position medium blockage.

　　解決方案:可快速打開、關閉二次管路或不銹鋼調節(jié)閥，通過介質壓力將雜物?；蛴霉軍A夾住閥桿，除信號壓力外，正、負旋轉閥桿閥芯閃過閥卡。也可增加氣源壓力反復上下移動，以達到松卡的地方。

　　Solution: It can quickly open and close secondary pipeline or stainless steel regulating valve, and remove debris through medium pressure. Or clamp the stem with a pipe. In addition to signal pressure, the positive and negative rotating stem spool flashes over the valve card. It can also increase the pressure of the air source to move up and down repeatedly to reach the place where the card is loose.

　　另一個是泄漏。一般不銹鋼閥門由于結構設計等因素，允許有一定的泄漏量。但當不銹鋼控制閥關閉狀態(tài),滲漏嚴重,通常由于閥桿的長度不合適的原因:不銹鋼控制閥打開,當閥桿太長,上下運動距離不夠,造成閥芯和閥的差距,不能正常關閉。解決辦法是調整不銹鋼調節(jié)閥閥桿，閥桿長度合適，可以正常關閉。

　　The other is leakage. Generally, stainless steel valves allow certain leakage due to structural design and other factors. But when the stainless steel control valve is closed, the leakage is serious. Usually due to the length of the stem is not appropriate: the stainless steel control valve opens, when the stem is too long, the upper and lower motion distance is not enough, resulting in the gap between the spool and the valve, can not normally close. The solution is to adjust the valve stem of stainless steel regulating valve. The stem length is suitable and can be closed normally.

　　以上就是介紹控制閥容易出現的兩個問題，一般來說，根據以上的解決方案都是很好的解決問題的，希望對您有所幫助。

　　The above is to introduce the control valve easy to appear two problems, generally speaking, according to the above solutions are very good to solve the problem, I hope to help you.