A21H-C-type valve, the valve Everbright (certified), the 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. A21F, A21H-C type spring Weiqi threaded safety valve for air temperature equipment or piping, ammonia, liquefied petroleum gas and other media ...... ≤200 ℃ for. A21W-P, R type spring Weiqi threaded valve for temperature ≤200 ℃ corrosive gas or liquid equipment or pipeline A21H-C type safety valve, as the overpressure protection device. KA21Y type spring Weiqi threaded valve for temperature ≤100 ℃ liquefied petroleum gas. Threaded valve spring Weiqi main parts material safety valve is opening and closing pieces by the external force is normally closed state A21F threaded valve spring Weiqi, exceeds a predetermined value when the media pressure equipment or pipeline rises through to the outside of the system to prevent the discharge medium medium pressure piping or equipment exceeds the value of special valves. Weifang valve valves are automatic valves, mainly used for boilers, pressure vessels and piping, control pressure does not exceed the value of personal safety and equipment operation plays an important protective role.