Fire valve is an important accessory for industrial and construction pipeline control, the product mainly has high control accuracy, especially in the flow control of a valve. At present, it is widely used in industrial control systems, and various problems usually occur in the process of use to trouble us. This small series mainly tells you the causes and treatment methods of internal leakage of fire valves.



1, from the cause of the problem and the solution analysis, maintenance/repair personnel in processing or assembly due to the influence of the process, is likely to cause the electric control valve internal leakage, mainly due to the comparison of the fixed limit switch action, in the control medium in the operation of the control valve continuous erosion and mode, will lead to the valve can not close and lead to internal leakage phenomenon. In this regard, we should mainly adjust the position of the limit switch, which can solve the phenomenon.

2. Improper commissioning of the fire valve led to internal leakage. Due to the failure of the electric regulating valve in the control part, the limit switch of the valve, the over-torque switch and other reasons lead to the wear or corrosion of the sealing surface, which will also cause internal leakage. We should still work on adjusting the limit switch.

3, because the zero setting of the electric actuator is not accurate, this is to lead to the valve can not be fully closed internal leakage. The main adjustment method is to manually close the valve, or to manually close the valve and then go back half a circle after the screw cannot be turned, this is to adjust the adjustment limit.

4, the valve is a push-down type of closure, if the actuator thrust is not large enough, it will also lead to the valve can not be fully closed and internal leakage. The main solution is to replace the actuator with a large thrust.

Jiangsu Liangzheng Valve Co., Ltd. leading products are: ball valve, butterfly valve, globe valve, check valve, flat gate valve and so on. Products from the selection of materials to finished products, the full use of international advanced management mode, to achieve professional, automated, standardized and programmed production organization. The company adheres to the scientific and technological innovation as the orientation of enterprise development, optimizes the product structure, and ensures the quality and speed of new product development and production.