Nhà > Tin tức > Trung tâm Tin

What is the Process Design of the Check Valve?

Apr. 26, 2021
Chia sẻ:

As a Ball Check Valve Leading Supplier, share with you.

Multi-function Check Valve

Multi-function Check Valve

(1) Quality control of the main body blank. All parts of this valve are forgings. The forging process is carried out in strict accordance with the forging process regulations and process cards, and the initial forging temperature, final forging temperature, deformation degree and deformation speed are strictly controlled. The cooling method performs cooling. Chemical composition analysis, mechanical property test, intergranular corrosion test, metallographic analysis of the forged product, after analysis, test and determination, all meet the corresponding standards.

The quality of forgings is guaranteed by ultrasonic inspection and liquid penetration inspection. Forgings are 100% ultrasonically inspected and evaluated in accordance with RCC-M requirements, and liquid penetration inspections and evaluations are performed on all surfaces of the forgings.

(2) Welding In order to improve the quality of surfacing welding, plasma argon arc welding is used for surfacing welding of the sealing surface of the valve disc and the valve seat. At the same time, in order to ensure the welding quality, the welding process used in production was re-qualified.

(3) Assembling test High-quality products not only require high-precision components, but also how to assemble these high-precision components into high-performance products. China Nuclear Su Valve has organized an assembly and commissioning team composed of many technicians and senior technicians with rich experience and excellent technology. It is responsible for valve assembly, commissioning, and testing, and formulates the cleaning process and assembly process of parts and components. Strictly check and keep improving during the commissioning, to ensure the successful assembly and commissioning of the valve, and various performance tests have been carried out. All indicators meet the requirements of the design task book.

(4) Process inspection has prepared a quality plan for the valve to ensure that the valve has been quality controlled from raw materials, blank input, machining, welding, heat treatment, non-destructive testing, cleaning, assembly, factory testing and various type tests, and has been approved. Recognition and on-site witness by the Second Industrial Research and Design Institute.

The butterfly double flap check valve is suitable for high-rise building water supply pipe network, pipe network with certain chemical corrosive medium, pipe network with limited installation space, and also suitable for sewage pipe network.

The lift-type silent check valve is suitable for pipe networks with high quality requirements for water supply and drainage projects; pipe networks with relatively high pressure requirements (PN2.5Mpa); it can be installed at the outlet of the pump and is an economical and practical waterproof hammer check valve.

The lift-type silencing check valve is suitable for water supply and drainage systems and high-rise building pipe networks. It can be installed at the outlet of the pump. With a slight change in structure, it can be used as a suction bottom valve, but it is not suitable for sewage pipe networks.

Horizontal check valve is suitable for diving, drainage and sewage pumps, especially for sewage and sludge systems.

Swing rubber check valve is suitable for domestic water pipe network; but not suitable for sewage with a lot of sediment

The swing single check valve is suitable for water supply systems, petroleum, chemical, metallurgical and other industrial sectors, and is most suitable for places with installation space restrictions.

Our company also has Multi-function Check Valve on sale, welcome to contact us.


+86 186 3170 8948 +86 158 3279 9409  dandan.d.lu zqkate info@civalves.com office@civalves.com 1604902265 1360762292