Several classification Fire gate valve: Rated water working pressure should be 175psi above the fire valve specifications, body and bonnet material for cast bronze alloy in line with the American Society for Testing and Materials standards ASTMB62. OS & Y valve structure and threaded connections. High rod valve: Rated water working pressure not less than 300psi. OS & Y valve cover and body to be of cast iron alloy ASTM ASTMA126 Class B standards. Valve connections should be flanged valves Fire sales, and with 250 pound or 300 pound flange. Fire classification and application of gate valve gate valve, also known as the fire valve type, according to the form of the valve plate can be divided into wedge gate and parallel type; in accordance with the structure of the valve plate can be divided into single gate, double plate and flexible gate . General wedge gate are made of a single gate, gate-parallel double plate are made. Parallel gate is easy to manufacture and repair. Sealing surface of the flexible gate are higher, generally applicable to the salary of a larger, high temperature media. Parallel shutter valve should normally be installed vertically on a horizontal pipe, and a wedge gate valve can be installed in a vertical pipe and horizontal pipes. Fire valve price | PENGDA Fire (certified) | Texas Fire Valve Co., Ltd. Shandong PENGDA provided by the fire valve. Valve Co., Ltd. Shandong Peng-Fire (www.pengda119.com) is an industry leader in Shandong Weifang, firefighting equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Fire in PENGDA leadership with the staff warmly welcome all inquiries negotiations to create a better future for the fire penta.