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.
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.
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.
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.
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.