Page 2 of Technical Articles

Leakages beyond nominal range occuring in the parts between safety valve clacks and seats which should be sealed will result in losses of media and damage of sealing materials. Generally, sealing surfaces of safety valves are made of metal materials and are made to be smooth and even. However, it is...

Cryogenic valves refer to valves applicable to the medium temperature between -40 ℃ and -196 ℃. The cryogenic valve includes the cryogenic ball valve, cryogenic gate valve, cryogenic globe valve, cryogenic safety valve, cryogenic check valve, cryogenic butterfly valve, cryogenic needle valve, cryogenic...

When pneumatic diaphragm control valves are running, there will be various kinds of process medium flow through the automatic valve, including the large blocks of raw materials, sand, stones, iron scales and iron sheets washed over by steam, and the slags cut off into the pipe in the process of instruments...

In the contemporary industry, pinch valves are the best option for transporting solid or liquid products containing abrasive substances such as particle, powder, fiber, sticky pulp, or some corrosive mediums in the chemical process. Austrian liner pinch valves are applied to sewage treatment plant (sludge...

Low temperature regulating valve installation tips: Check if the valve parts are damaged or loose. Those mediums which are harmful for human health must have intensity, sealing, leakage and accuracy tests. Clean pipes and valves, remove impurities and oil before installing. The user can make specific...

In the design of valves, the valve filler of lift valves are asbestos packing, grafoil and V type PTFE. But these filler are limited by the times of opening and closing of valves. With the increasing of opening and closing times, the filler will be weared and the gap will increase. The valve will leak...

As automatic valve, the function of Muffle check valve is to prevent the media flow backward into the pipeline. It's mainly applied to one-way medium flow pipeline to avert accidents.     The maintenance of Muffle check valve:    Headstock piece should be in the closing...

The main reason for noise generated by pressure relief valve can be divided into three parts: mechanical vibration noise of pressure relief valve, hydrodynamic noise, aerodynamic noise. Noise generated by Mechanical vibration When the fluid flows, the component of pressure relief valve, pneumatic control...

Flue gas desulfurization is the main measure used to control emission of sulfur dioxide in current coal-fired power plant. Among that, limestone-gypsum flue gas desulfurization is the most mature technology having been the mostly applied around the world. Valves are control device used to deal with...

The followings are the methods which used to install flanged valves: 1. The surface of valve and piping flange should have damage, scratch and other defects. Besides, they should be kept clean. Especially when valve adopts metal gasket, grooving on flange disc should coincide with gasket. Flange disc...

V-port ball valve also called as V-port stop valve or V-port controlling ball valve, is a kind of trunnion ball valves. It is also single-seat sealing ball valve, having the best controlling performance in all of ball valves. The V port has shearing with the metal seat, especially suitable for media...

As the new products, ceramic valves now have been widely used in thermal power plants, iron and steel, petroleum, chemical, papermaking, bio-engineering and other industries. And there are five points which you should pay attention to when installing and maintaining a ceramic valve. 1 Ceramic valves...