Curtain area: When the cylindrical surface-shaped or conical surface shaped channel area at the top of the valve seat valve type, between the sealing surface is formed. The discharge area: the valve discharge minimum cross-sectional area of ??the fluid passage. For a full revelation valve discharge area equal to the flow area; for inching valve discharge area equal curtain area. Shandong Everbright Valve Co., Ltd. specializes in producing high temperature and pressure relief valve manufacturers valves, welcome new and old customers to order our products! Boiler safety valve is an important safety accessories pressure vessels and other equipment under pressure. Safety valve (also known as pressure relief valve) is automatically open and close depending on the pressure system operating pressure (temperature), usually installed in equipment pipeline protection system security or closed system. Shandong Everbright Valve Co., Ltd. specializing in the production valve manufacturers, welcomed the new and old customers to order our products! Given the need for pressure relief device stainless steel valves, safety valves play a crucial role in the protection device process. As of 2013 all types of valve manufacturers and traders have over more than 700 inquiries daily trading reached more than 200, the valve supply and demand in the market was heating up. Preliminary analysis of the data through the first quarter, the demand for higher safety valve twenty percent. Shandong Everbright Valve Co., Ltd. specializing in the production valve manufacturers, welcomed the new and old customers to order our products! Valves, Shandong, China Everbright valves, cast steel valves provided by the Shandong Everbright Ltd. 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!