When the pressure Double spring-loaded safety valve device exceeds a predetermined pressure of work and reach safety valve opening pressure, internal role of the media in trouble flap above loading mechanism force is greater than the force exerted on it, so the valve from the valve seat Prices cast steel valves, safety valves open, the media inside the device is discharged through the valve seat, if the safety valve displacement is greater than the safety discharge equipment, Equipments pressure that is gradually decreased, and after a short time by the exhaust pressure that is drop back to normal operating pressure. Pressure within this time to force the valve flap above loading mechanism which is less than the force applied to it, and pressed against the valve seat and the media to stop the discharge, equipment to maintain the normal operating pressure continues to run. Therefore, the safety valve is a force on the valve through the medium loading mechanism of action and dynamics cast steel valves brand, or turned itself off to prevent equipment overpressure to reach the goal. The adjustment ring is used to change the flow of media in the valve flap folding rear side reflection angle, thereby changing the size of the fluid forces, in order to adjust the pressure back seat. When the adjustment ring increases camber reduce wholesale cast steel valves, fluid force is decreased, so that the back seat pressure increased. Conversely, when the adjustment ring on the lower, back seat pressure is reduced. Of course, the adjustment ring in the back seat pressure change, but also affects the discharge pressure cast steel valves, which increased pressure on the adjustment ring so that emissions have increased pressure adjustment ring so that emissions decreased on lower, but its impact degree as obvious as back pressure. ① adjust the valve discharge pressure and reseating pressure valve must be open to all high action test, therefore, only in the test device capacity, or after installation to be protected on the device may only be carried out in safety valve. The adjustment method varies depending on the valve structure. Shandong Everbright Valve Co., Ltd. specializing in the production valve manufacturers, welcomed the new and old customers to order our products! Cast steel valves cast steel valves _ price _ Valve Co., Ltd. Shandong by Shandong Everbright Everbright valve. Shandong Everbright Valve Co., Ltd. (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!