1. Process defects during valve casting (1) Hole defects, such as pores, shrinkage holes, porosity, slag holes, blisters and iron beans. They may expand into hidden dangers in use. Most of the pores are distributed on the surface of cast iron or near the surface, which are spherical or pear-shaped;

valves generally have poor sealing performance. Many buyers and even sellers do not know how to solve them. Now we have five methods to solve the poor sealing performance of valves for reference.(1) Grinding methodFine grinding, eliminating traces, reducing or eliminating sealing gaps, improving the

1. Working principle of gas cylinder pressure reducing valve:The high pressure chamber of the gas cylinder pressure reducing valve is connected to the cylinder, and the low pressure chamber is a gas outlet and leads to the use system. The indication of the high pressure gauge is the pressure of the

The installation of the pressure reducing valve must be in accordance with the direction of the arrow on the valve body to maintain the direction of fluid flow. If the water quality is not clean and contains some impurities, the filter must be installed at the upstream inlet of the pressure reducing