1. the strength of the strength properties of the valve is the valve's ability to withstand pressure. Valve is subjected to internal pressure of mechanical products, which must have sufficient strength and rigidity to ensure the long-term use without cracking or deformation.
2. seal valve is the valve sealing performance the seal's ability to prevent media leaks, it is the most important valve technical performance indicators. Valve seals in three parts: the discs for contact with the valve seat sealing surface of the two Office packed with the valve stem and the stuffing of the distribution and service; valve body and valve are covered and the joints. One previous leak called the internal leakage, which is commonly referred to as doesn't stay closed, it will affect the ability of valve truncated media. Cut off valves, leakage is not allowed. Two of the leaks is called leakage, that media leaks from within the valve out of the valve. Leakage would cause material loss, environmental pollution, which can also cause accidents. For inflammable, explosive, toxic or radioactive medium, leakage is not allowed, thus the sealing performance of valve must be *.
3. the flow medium flowing through the valve after the pressure losses (both before and after the valve pressure difference), valve of the flow medium have a certain resistance, the media will consume a certain amount of energy to overcome the resistance of the valve. From energy conservation considerations, designing and manufacturing valves, to minimize valve on the flow resistance of the medium.
4. performance of 1). * of action sensitivity and
This parameter is the valve for medium, reaction sensitivity accordingly. Throttle valve, pressure relief valve, control valves used to regulate the media parameters, such as valves and safety valves, steam traps, valves with a specific function, the functional sensitivity and * is a very important technical performance indicators.