The correct choice of the meaning of the valve

Correct choice of the meaning of the valve Correct choice of valves, to ensure safe production equipment, improve valve life, to meet the long-term operation of the device is essential. Many valve accidents are mainly due to improper use of valves, such as the use of cast iron valves in cold regions, the water in the oil in the valve body, frozen in winter is easy to freeze the valve. In some pump outlet valve, due to some reasons, the required flow is lower and the pump power is larger occasions, often using small gate valve to regulate the flow of the method, due to the local opening of the valve plate, resulting in vibration and speed up the brake Plate and seat sealing surface wear, it is easy to cause the valve leakage. In addition, the quality of the valve on the production and use of a great impact. If a chemical plant explosion occurred in an accident, the cause of the accident identified, together with the valve by the serious quality problems caused by the accident. The reason for the explosion is that the second-stage outlet valve can not withstand the sudden burst of normal working pressure and the non-return valve fails. The semi-water gas of 0.75MPa in the system quickly spills out and mixes with the surrounding air to form an explosive gas space where a gas chemical explosion occurs. According to testing the valve has a number of indicators do not meet the relevant national standards. In addition, both of these are water, steam and oil-based valves, non-flammable gas valves, design department selection is wrong. Therefore, the correct choice of valve on the device production, safety, long-term operation, improve efficiency are very important.