High-pressure Differential Pressure Reducing Valve

Design Standards

Design and manufacturing: API623, GB/T12235

Connection size: ASME B16.5, HG/T20592, GB/T9124

Structure length: designed according to enterprise standards or designed according to customer requirements

Inspection and acceptance: API 598, GB/T 26480

Structural Features

● Adopt high-pressure self-sealing structure, the higher the pressure, the more reliable the sealing;

● Spiral decompression cylinder. This decompression principle has obtained national invention patents;

● For high-pressure valves in power stations, due to the high-speed flow of media, the valves have problems such as erosion, vibration and noise. Therefore, this type of valve has to be made of special materials, which must have high strength and wear resistance. The valve continues to operate under high pressure, high temperature and high flow rates, greatly reducing its life. The spiral pressure reducing structure adopts tortuous spiral flow channels and multi-stage smooth pressure reducing, which increases the resistance coefficient of the throttle member, increases the adjustable range of the resistance coefficient, reduces the flow rate, and effectively improves the low life of the high-pressure differential valve. After a large number of test verification and experience accumulation, we used 17-4PH material to solve the problem of valve material selection. This material has been solid solution and aging treatment, has high strength and wear resistance, and has rust prevention. effect;

● Adopt the internal design of multi-layer pressure reducing sheet combination, and different outlets can be designed according to the requirements of medium process parameters. The multi-level progressive pressure reduction internals allow the fluid to consume energy starting from the first pressure reduction plate it comes into contact with, and the fluid pressure is reduced through multiple pressure reduction plates to prevent flash evaporation, cavitation, and increase the service life of valve internals;

● The sealing surface of the valve body is made of welded ST cemented carbide, and the mirror surface requirements are met through special grinding technology, making the valve have excellent shut-off function.

Main Parts & Materials

Body——ASTM A182 F316L

Stem——17 - 4PH

Bonnet——ASTM A182 F316L

Pressure reducing tablets——17-4PH

Application Scenarios

It is especially suitable for use in high-power generating units (supercritical units). It can reduce noise, prevent vibration and cavitation in pipelines, greatly reduce losses, greatly improve production efficiency, and reduce production costs. The ingenious spiral decompression method provides higher decompression efficiency.