• What are the types of valves?

    Types of valves Valves can be divided into gate valves, globe valves, check valves (check valves), ball valves, butterfly valves [center sealing butterfly valves, single eccentric sealing butterfly valves, double eccentric sealing (high performance) ...

  • What is the principle of pneumatic plastic PVC butterfly valve

    Principle of pneumatic plastic PVC butterfly valve: Pneumatic plastic PVC butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve man to open and close to achieve activation. It is mainly used as a cut-of...

  • Working principle of plastic butterfly valve

    The plastic butterfly valve (https://www.chinavalvefittings.com/product/valve-series/butterfly-valve/) originated from the American invention of the butterfly valve in the 1930s. The plastic butterfly valve was developed in Japan in the 1950s and was...

  • Common valve failures and treatment methods

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

  • How to select the valve? -chinavalvefittings.com

    Valve selection basis 1. Fluid working conditions (pressure and temperature) 2. The nature of the fluid (corrosive, etc.) 3. The purpose of selecting the valve (throttling, pressure control, etc.) Since the valve has a wide range of uses, it also pla...

  • Key points of valve selection

    1. Correctly select the type of valve The correct choice of valve type is based on the designer's full grasp of the entire production process and operating conditions as a prerequisite. When selecting the valve type, the designer should first grasp t...

  • Common valve selection instructions

    1. Ball valve selection instructions Ball valves are suitable for low temperature, high pressure, and high viscosity media. Most ball valves can be used in media with suspended solid particles, and can also be used in powder and granular media accord...

  • What is PVC plastic diaphragm valve

    1. Working principle of PVC plastic diaphragm valve: The plastic diaphragm valve uses a corrosion-resistant lining valve body and a corrosion-resistant diaphragm instead of the valve core assembly, and the movement of the diaphragm is used for adjust...