Page 13 of Industrial News about Valve Industry

It can be frequently seen that the disc and the seat of valves such as the regulating valves and the pressure reducing valves have abrasion, deep grooves and pits inside, which are mostly caused by cavitation.  Contents ♦ Definition of Cavitation ♦ Definition of Flashing ♦...

Gate valves are important components of the oil and gas transporting device. The common defects of several gate valves in use are as follows: Leakage between valves First, check whether the coupling bolts that connect gate valves are tightened. If they are not tightened, the gasket ring and...

A safety valve is a valve type overpressure relief device, which is mainly comprised of three parts: the valve seat, disc, and loading mechanism. It is an automatic valve that uses the pressure of the medium itself to discharge a nominal amount of overpressure fluid through the opening of the valve...

Pressure test methods for butterfly valves The strength test of the pneumatic butterfly valve is the same as that of the globe valve. During the sealing performance test of the butterfly valve, the test medium should be imported from the end of the flow. The disc should be opened while the other end...

In general, strength tests of industrial valves are not taken during use, but the valve body and bonnet that are corroded or repaired should take strength tests. For safety valves, the constant pressure, return pressure and other tests should comply with the specifications and relevant regulations....

General requirements 1. The specifications and categories of valves should comply with the requirements of the piping design. 2. The model number of valves should indicate the requirement of the standard number. The relevant description of the model number should be indicated if the valve follows the...

In recent decades, with the development of modern science and technology, there is an increasing demand for high temperature valves in engineering projects, among petrochemical, chemical, electric power and other industries.  Since long-term high-temperature environment will affect the physical...

In the 1960s, the economies of developed, industrialized countries went into a period of prosperity. Countries such as West Germany, Japan, Italy, France, and the United Kingdom were eager to find an international market so as to export their products, including complete sets of machinery and equipment,...

The development of valves is closely related to the development of industrial production processes. In ancient times, large stones and trunks were used to impede or change the direction of the flow of rivers or creeks. And as early as the end of the Warring States Period, Li Bing (whose birth and death...

Manual valves are a type of valves operated by handles or hand wheels and commonly used on equipment and devices. Generally, rotating the handle or hand wheel clockwise will turn off the valve while rotating anticlockwise will turn on the valve. But some valves have the opposite direction of opening...