A48Y type used in ,working temperature≤350℃, steam、air media equipments or pipelines.

A44Y type used in ,working temperature≤300℃, air、petroleum media equipments or pipelines, as over-pressure protection device. Connection flange standard : PN＜6.4MPa according to JB/T-94 standard, PN≥6.4MPa according to JB/T-94 standard

Structure description

1.       simple structure, good sealing performance, open the pressure of accurate emission capacity, back seat pressure is small, easy to adjust and so on.

2.       Nozzle-type Seat: Seat for places Laval nozzle-type seat, steam flows through the valve seat and reached the speed of sound crossing exit , emission coefficient, the valve seat sealing surface welding of cobalt chromium tungsten carbide, wear anti-erosion, long life

3.       Thermoelastic valve flap: flap valve is designed to heat flexible structure, using its small deformation under medium pressure to improve sealing capability , overcome the pressure relief valve in the medium pressure setting near the top to vent phenomenon. Flap valve sealing surface adopt advanced laser hardening technology to improve the hardness, wear resistance, impact resistance.

4.       Adjustment nut: by adjusting the adjustment nut, adjust the spring compression, so that the valve can be very convenient, very rapid access to get accurate pressure.

5.       Back pressure adjustment sets: Adjusting the valve flap back pressure of the subsidiary bodies, through the back pressure adjustment sets of adjustment, available to the appropriate back seat pressure. When raised, so that the valve to reduce back pressure. Downturn, so that the valve back pressure increase.

Installation description

1, safety valve must be installed vertically and preferably directly installed on the container or pipe connector. Joints should not be less than the diameter of the import of safety valve path.

2. The outlet of muffler should be enough size, preventing back-pressure valve affect the ability of emissions.