Page 12 of Industrial News about Valve Industry

What are the characteristics and applications of straight-through single-seat control valves? (1) The discharge flow is small, the sealing performance of this kind of valve can be assured since it has only one valve core. The standard discharge flow is 0.01% KV and can be further designed as a shut-off...

As indispensable equipment in industrial production, valves may encounter many problems from selection, use to maintenance. Here are some common questions and answers. What are the three main factors that should be considered when choosing a valve? (1) The output of the actuator is greater than the...

The unique characteristics of the ball valve determine the use of it is relatively wide, usually in the two-position adjustment. With their good sealing performance, quick opening and closing action  (1/4 turn open and close), ball valves are recommended for piping systems with high pressure cutoff...

A ball valve is mainly used in the pipeline to cut, distribute the flow and change the flow direction of the medium. It can be closed tightly by only a small torque and being rotated 90 degrees. The ball valve is most suitable for use as a switch or shut-off valve. Ball valves were introduced in the...

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...