Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China flap valve manufacturer and distributor of valves, hoses, tubes and pipes. Our oem flap valves are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

These flap valves are designed for use on pump discharge lines and other pipe end closures to prevent entrance of back water. These valves are furnished with a variety of frame styles to fit most installation needs. A 7-1/2o inclined seating plane is used to ensure that the valve will not "hang open" from slight pipe sagging or off grade. A positive stop prevents over opening. The compression model uses time proven wedge type seals to install quickly and easily on plain end standard steel pipe. This model is standard with a cast iron frame with machined seat face and a cast iron cover with a resilient neoprene rubber seat face. Follow ring is cast iron with rubber wedge gasket and plated steel draw bolts. Valves are available with aluminum covers and neoprene seat faces where extra sensitivity is desired. Taper setting collars can be provided as an aid for installation on concrete pipe. The valves have a cast iron flanged frame, cast iron flap, iron-to-iron, bronze or neoprene seating, and a bronze pivot pin.

Flap valves are used for end closure of outfall lines, or in manholes, to prevent entrance of backwater. They swing open under direct pressure to release the outfall fluid and close when direct pressure is relieved. The valve disc is offset from vertical to ensure positive closing. Flap valves are used in filtration and sewage disposal plants and in various industrial installations, and are furnished bronze mounted. Flap valves are available with flanged end connections, in sizes 4" - 30". Frame, flap and anchor flange of PE-HD. Flap shaft of stainless steel 1.4301. Flap sealing surfaces of EPDM. With anchoring system for concrete walls. Flange connection or blunt ends for socket connection to concrete or plastic material pipes. Soft sealing. This type of valve is designed for service as a check valve on the end of a pipeline. Valves are available with aluminum covers and neoprene seat faces where extra sensitivity is desired. Taper setting collars can be provided as an aid for installation on concrete pipe.

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