[Din 902 full lift safety valve] ——
It depends on the force of the spring to press the valve core on the valve seat, so that the safety valve is in the closed state, and the steam is lifted upward under the valve core. During normal operation, the downward pressing force of the spring is greater than the upward thrust of the steam, and the valve is closed. When the steam pressure reaches the seat pressure of the safety valve, the force of the steam on the spool is greater than the force of the spring, so that the spool is lifted, and the safety valve discharges steam. The adjusting pressure of the safety valve can be adjusted by changing the tightness of the spring through the adjusting screw on the upper part of the valve stem. This safety valve has the advantages of convenient adjustment, small volume and weight, and large steam exhaust capacity. It is suitable for boilers with different parameters and different capacities.
FIG.900 spring full-open safety valve is suitable for equipment and pipelines with air, petroleum gas, liquid and other media with working temperature ≤300 ℃.
FIG.920 and FIG.940 spring full-open safety valves are suitable for equipment and pipelines with corrosive media at operating temperature ≤200 ℃.
FIG.902 spring full-open safety valve is suitable for steam, air and other media equipment and pipelines with operating temperature ≤350 ℃, as an overpressure protection device.
1. Spring direct load type;
2. Wear-resistant seat / valve head;
3. The valve head is accurately positioned and guided;
