John Valve Mfg. Factory Co., Ltd is one of the leading valve manufacturers based in Taiwan with long history. We engineer and manufacture valve solutions for all industries. Our products are widely used in Chemical, Petrochemical, Petroleum, Oil and gas, Bio-tech, Pharmacy, Marine, Food and Beverage industry.

John Valve's advantages over other manufacturers or trading companies:
ñEvery valve is pressure tested according to API-598 and EN12266 std.
ñIn-plant Research and Development Department for inventing new features and customs'  developing works
ñIn-plant Certified NTD-PT inspectors and certified machining Engineers.
ñIn-plant Testing Laboratory: 3D Co-ordinate measuring machine test, Air & Hydraustatic test, Chemical Analysis, Mechanical testing facilities : Tensile and Charppy test, Life Cycle test.
ñIn-plant CNC Lathe Machines and machine centers for extra routing and machining
ñWorks Certificate (EN 10204/3.1) are offered for all related valves of our products range, and each with Heat Number for easy traceability

Every customer all over the world is of great importance of John-Valve. We are committed to serve our customers with advanced ideas, elaborate planning, efficient management and reliable service.
To serve our customers wholeheartedly is not only just a slogan, but the most important issue of our enterprise behavior.

With your support, John Valve will continue to guarantee excellence in the future.