(1) Preparatory work before assembly: Before assembly, valve parts need to remove the burrs formed by machining and welding residues, clean and cut fillers and gaskets. (2) Cleaning of valve parts: The inner cavity of the valve installed as a fluid p...

 1. Nominal pressure PN (MPa)  The reference value related to the pressure resistance of piping system components refers to the design given pressure related to the mechanical strength of the piping components. The nominal pressure is genera...

Valve assembly is the final stage in the manufacturing process. Valve assembly is the process of combining various parts and components of the valve to make it a product based on the prescribed technical premises. The whole machine is the most basic ...

With the development of the industry market, plastic pneumatic ball valves are gradually being adopted by everyone, so do you know what are the specific characteristics of plastic pneumatic ball valves ? Next, let's take a look at the specific charac...

The selection criteria of the check valve are as follows 1. In order to prevent the medium from flowing back, check valves should be installed on the equipment, devices and pipelines; 2. Check valves are generally suitable for clean media, not for me...

1. The structure length is short, and its structure length is only 1/4~1/8 of the traditional flange check valve 2. Small size and light weight, its weight is only 1/4~1/20 of the traditional flange check valve 3. The valve flap closes quickly and th...

    ASME B16.5 has clear regulations on the number of bolt holes and the diameter of bolt holes in flanges. The number and diameter of flange bolt holes are different due to different flange pressure levels, but all types of flanges of the same press...

Check valve refers to the valve that automatically opens and closes the disc depending on the flow of the medium itself to prevent the medium from flowing back. It is also called check valve, one-way valve, reverse flow valve and back pressure valve....

With the advancement of skills, high-parameter and messy working conditions such as high temperature, high pressure, deep cold, high vacuum, strong corrosion, radioactivity, highly toxic, flammable and explosive, etc. in industrial production are inc...

The disadvantage of the rubber-sealed butterfly valve is that when it is used for throttling, it will cause cavitation due to improper use, causing the rubber seat to peel off and damage. For this reason, metal sealing butterfly valves are now being ...

To maintain air tightness, the valve must have a good seal. If there is a problem with the seal, there will be air leakage.   As a control component in the fluid conveying system, the valve has the functions of cut-off, regulation, diversion, prevent...

After the valve is used for a long time, the sealing surface of the valve disc and the valve seat will be worn and the tightness will be reduced. Repairing the sealing surface is a large and very important task. The main method of repair is grinding....