The product according to national standards GB12236 design manufactures,
the structure is reasonable, seals densely reliably, the performance is fine.
Valve disc and seat of the sealing surface of iron alloy or stellite made of
cobalt-based alloy welding, wear-resistant,high temperature, corrosion,
anti-abrasion performance and long service life.
May use all kinds of tubing flange standard and the law packing surface pattern,
satisfies each kinds of project to need and the user request.