Our company specializes in production of pneumatic valves. To provide our clients with Dg25, Dg40, Dg50, Dg80, Dg100, Dg125, Dg150, Dg250 diameter of the valve (open air, gas closed). Our product is plastic valves, valve of small size, light weight, simple structure, no leakage, corrosion, acid and alkali. Pneumatic valves obtained three patents Patent Office: 91226157, ZL982065426, 991271610. One manual valve to obtain patent patents: ZL99211062.9. We plot ten years of successful development of a valve research SMJ series, DNM series valves, greatly to the market. Shougang power plants, power plants and chemical industry in the Yanshan effective, to change the workers valve big, stupid, and missed the image. In practice, it has a switch to a flexible, easy (more>>)