Weiqi threaded valve _ Everbright valve (certified) _ safety valve provided by Shandong China Everbright Limited valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) is specialized in the "valve" of the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Ma. The general form of the structure into the safety valve spring safety valve and lever valve, pulse valve A21F threaded valve spring Weiqi, where the most common spring-loaded safety valve; press into the threaded connections and valve flange valve. Generally not large diameter valve A21H-C-type valve, commonly used in DN15mm-DN80mm among more than 150mm are generally referred to as large diameter valves. Valve Co., Ltd. Shandong Everbright valve manufacturer specializing in the production, welcome new and old customers to order our products! Discharge pressure: the valve inlet pressure reaches a predetermined height when open. Limit the discharge pressure of the need to obey the requirements of the relevant standards or norms of the country. Over pressure: the pressure difference between the discharge opening pressure, the opening pressure is usually expressed as a percentage. Valve Co., Ltd. Shandong Everbright valve manufacturer specializing in the production, welcome new and old customers to order our products!