The pneumatic back pressure valve adjusts the back pressure by controlling the pressure of compressed air, thereby regulating the fluid pressure in front of the valve. The pressure can be adjusted continuously within the control range, enabling stepless and continuous back pressure regulation. It supports various control methods, including remote control and on-site pneumatic control. The back pressure in front of the valve is controlled by air pressure, and the output ratio of air pressure to back pressure can be adjusted by changing the diaphragm size. The current pneumatic control ratio ranges from 1:1 to 1:40. This valve is suitable for applications that require remote and precise fluid pressure control.

The air supply pressure for this pneumatic back pressure valve should not exceed 0.8 MPa.

This series of back pressure valves adopts a piston-sealed design, making it suitable for 

stabilizing pressures of high-purity gases or liquids, toxic substances, or corrosive fluids.

The surface of the carbon steel safety relief valves we produce is treated with spray coated, nickel plated or black oxide, so it has good corrosion resistance and can withstand the erosion of various chemical substances, suitable for various liquid environments. 

Compared with other materials, carbon steel material has good pressure resistance and processing precision, with exquisite appearance and good surface smoothness. They are made of refined all metal materials, with a heavy weight and a sense of condensation, and a long service life which widely be used in many important industrial fields such as petroleum, chemical, power, metallurgy, etc.

The PVDF safety relief valve we produce adopts the design with PVDF material for the wetted part. Compared with other materials, PVDF has extremely high chemical stability and can withstand corrosive media such as strong acids and alkalis, ensuring the long-term stable operation of the safety relief valve under extreme working conditions. At the same time, it has good thermal stability, which can ensure that the safety valve can maintain its performance in high temperature environments and remain stable. PVDF material also has excellent wear resistance and fatigue resistance, and can maintain excellent stability and reliability even under harsh working conditions of frequent opening and closing, extending its service life. The PVDF safety valve has a smooth surface, is not prone to scaling, is easy to clean and maintain which  can reduce maintenance costs.

PVDF safety relief valves have become outstanding in the field of industrial safety due to their excellent performance, wide applicability, and high reliability, providing indispensable safety guarantees for multiple fields such as chemical, petroleum, and pharmaceutical industries.

The Pressure Relief Valve(safety valve) is one of the indispensable accessories for the use of metering pumps. The following is an analysis and solution of the faults that may be encountered during the use of the back pressure valve.