The main features of flanged butterfly valves are: 1. Small and light, easy to disassemble and repair, and can be installed in any position. 2. The structure is simple and compact, the operating torque is small, and the 90° turn to open quickly. 3. T...

        With the reform and progress of the times, my country's valve products are constantly innovating along with the change of the times. At present, in the valve market where environmental protection and safety are becoming more and more demandi...

Exhaust valves are used in independent heating systems, central heating systems, heating boilers, central air conditioners, floor heating and solar heating systems and other pipeline exhaust. Because there is usually a certain amount of air dissolved...

Selection of check valve structure Ordinary check valve is mainly composed of spool, valve seat and spring. Spool Most spools are either ball valves or poppet valves. The difference between these two structural forms is mainly reflected in the tightn...

The valve is a control component in the pipeline fluid transportation system. It is used to change the cross-section of the passage and the direction of the medium flow. It has the functions of diversion, cut-off, throttling, check, shunt or overflow...

1. Valve grinding inspection   During the grinding process, the inspection stage is always run through. The purpose is to keep abreast of the grinding situation at any time, to be aware of the situation, and to achieve the technical requirements of t...

1. Why does the desalination medium use rubber-lined butterfly valve and fluorine-lined diaphragm valve have a short service life?   Demineralized water contains low concentrations of acids or alkalis, which are highly corrosive to rubber. The corros...

The purpose of valve acceptance?       Through the acceptance, the quantity and appearance of the delivered valve can be checked and checked to prevent the appearance quality damage and lack of quantity during transportation, loading and unloading, ...

Part 1: Brief introduction of PVC processing technology 1. The role of raw materials (including physical properties, chemical properties, mechanical properties of raw materials and their role in PVC); 2. The formula of PVC ; 2.1. Synergistic reaction...

A valve is a pipeline accessory. It is a device used to change the cross section of a pipeline and the direction of medium flow, and to control the pressure, flow, and temperature of the conveying medium. Specifically, it has the following purposes: ...

PVC pipes have become a popular building material due to their low cost and durability. PVC pipes can be used in most drainage, water supply, and ventilation applications. In these applications, most owners believe that PVC is a maintenance-free prod...

1. PVC (UPVC, RPVC, PVC-U) 1. The best mold temperature is 40℃. The shrinkage rate of coarse powder is 0.1~0.5%, and the shrinkage rate of fine powder is 1.5%. 2. After 24 hours at room temperature, absorb 0.02% of water. If necessary, bake at 65℃/3...