Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China keystone valve manufacturer and distributor of valves, hoses, tubes and pipes. Our oem keystone 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.

A comprehensive range of valves to suit a wide range of industrial applications. The range can be seamlessly integrated with the Keystone range of pneumatic/ electric actuators and accessories, to create complete flow control packages.A versatile range of resilient seated quarter turn butterfly valves, available in various designs, configurations and materials to match all specifications. Stainless steel hygienic butterfly for isolation and control, in the food, dairy, brewing, pharmaceutical, beverage and chemical industries. Size range DN25 - DN150,Pressure range from from full vacuum uo to PN20 ,Temperature range from -10°C +95°C.Flange connections wafer style, and various other connections like IDF/FIL male part, Butt weld (std) for RJT/BSM male part, Clamp connection.

Stem - Machined from 17-4 Stainless Steel to eliminate twisting of stem. Gives direct disc control of full or partial product flow. Top Plate - Machined to standardized drilling pattern allowing manual handle kits, and actuation, interchangeability also available in ISO patterns.
Stem Bushing - Composed of full strength, corrosion resistant ertalyte, stem bushings absorb operator side thrust. Top bushing comes standard in all valves, while bottom bushing comes with all valves sizes 4" - 12". to ensure trouble free valve operation. Stem-Seal - A third seal ensuring absolute seal externally or internally for vacuum or pressure service. Available in Buna-N, EPDM, or Viton. O-Seal (patented) - Two Sure Seal O-Seals give a sure secondary seal as the O-seal becomes part of the body and encircles the stem before entering the seat and disc area. O-seals are also located at top and bottom of stem entry to form an absolute secondary seal. Available in Buna-N, EPDM, Viton, or Teflon.

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