Plastic pneumatic butterfly valve is composed of fine, medium and small pneumatic regulating valve and pVC valve. It is mainly used to interrupt, connect and adjust the material in the pipeline. It has excellent liquid handling characteristics and s...

Leakage of valve body: the reason: 1. The valve body has blisters or cracks; 2. The valve body is cracked during repair welding deal with: 1. Polish the suspected cracks and etch them with 4% nitric acid solution. If there are cracks, they can be rev...

With the rapid development of the times, plastic pneumatic butterfly valves are used in many industries, such as the unavoidable pure water and domestic drinking water piping systems in our lives, urban drainage and sewage piping systems, salt water ...

The main features of the valve are its simple and compact structure, convenient repair, easy repair and operation, reliable sealing, suitable for general working media such as water solvents, acids and natural gas. It is also suitable for media with ...

(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....