Knowledge

Knowledge

What is the difference between lining and vulcanized valve seat?

There are three types of rubber seat. One is a soft seat, which can be installed and removed at will. It is elastic; the other is a backrest seat, which is a hard seat. The seat is knocked into the valve by external force. The body, but it can also be disassembled, which is much […]

The role and classification of valves

Valves have many functions. Different valves should be selected for different functions. Different types of valves have different structures. These functions are all means to effectively control the process and ensure safety. Valves are generally divided into automatic valves and drive valves. Automatic valves (such as safety valves, pressure reducing valves, steam traps, check valves) […]

Valve selection basis and selection guide

How to select the righty type of valve? the following article will give you an idea how to choose the right structure/type valve. Nowadays, there are more and more valves on the market, the types of valves are particularly complex, and the structures and materials are all different. The selection of valves is very important […]

Troubleshooting of check valve

Troubleshooting of check valve: 1. The disc is broken The reasons that cause the valve disc to break are: The pressure of the medium before and after the check valve is close to balance and they are “see-saw” each other. The valve disc often beats against the valve seat, and the disc made of some […]

Introduction of U-shaped flange butterfly valve

What is U-shaped flange connection butterfly valve? The U shaped butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be opened and closed quickly by rotating 90°, and the operation is simple. At the same time, the valve has good fluid […]

Uses and characteristics of manual butterfly valve (4)

Installation and maintenance of manual butterfly valve: During installation, the disc should stop in the closed position. The opening position should be determined according to the rotation angle of the butterfly plate. For the butterfly valve with bypass valve, the bypass valve should be opened before opening, and the installation should be carried out according […]

Uses and characteristics of manual butterfly valve (3)

Features of manual butterfly valve: The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve opening and closing or adjustment of the valve is called a butterfly valve. The butterfly valve is usually less than 900 from fully open to fully […]

Butterfly valve and its Development history – (2)

China’s valve industry chain is numerous, but it is not a valve power. Generally speaking, my country has entered the ranks of the world’s valve power, but from the perspective of product quality, my country still has a long gap from the valve power. The low production concentration of the industry, the low R&D capacity […]

Butterfly valve and its Development history – (1)

Butterfly valve, also known as flap valve, is a kind of simple structure regulating valve, which can be used for the on-off control of low-pressure pipeline medium; is a kind of valve that the closing part (flap or disc) is a round plate, which rotates around the valve axis to achieve opening and closing. The valve can […]

Installation requirements for manual butterfly valves

1. Before installing the manual butterfly valve, do not throw it away at random. It needs to be placed in a cool, dry and ventilated environment, and it must be covered well to prevent the valve from being contaminated with dust and other debris, which affects the later use. 2. Before installing on the pipeline, […]