The types of safety valves we can manufacture include:
By Structure:
1. Weighted Lever Safety Valve
2. Spring-loaded Micro-lift Safety Valve
3. Pulse Safety Valve
By Medium:
1. Fully Enclosed Safety Valve
2. Semi-Enclosed Safety Valve
3. Open Safety Valve
Selection Principles:
1. Steam boiler safety valves: generally open full-lift spring safety valves (0490 series);
2. Liquid medium safety valves: generally micro-lift spring safety valves (0485 series);
3. Air or other gas medium safety valves: generally full-lift spring safety valves;
4. Liquefied petroleum gas tank trucks or railway tank cars: generally full-lift internal safety valves;
5. Oil well outlet safety valves: generally pilot-operated safety valves;
6. High-pressure bypass safety valves for steam power generation equipment: generally pilot-operated safety valves with dual safety and control functions;
7. If periodic opening tests are required for the safety valve, a safety valve with a lifting wrench should be selected.
When the medium pressure reaches more than 75% of the opening pressure, the valve disc can be slightly lifted from the valve seat using a lifting wrench to check the flexibility of the safety valve opening; 8. If the medium temperature is high, in order to reduce the temperature of the spring chamber, a safety valve with a radiator should generally be selected when the operating temperature of a closed safety valve exceeds 300℃ and the operating temperature of an open safety valve exceeds 350℃; 9. If the back pressure at the outlet of the safety valve is variable, and the change exceeds 10% of the opening pressure, a bellows safety valve should be selected; 10. If the medium is corrosive, a bellows safety valve should be selected to prevent important parts from failing due to corrosion by the medium.
