1.Sealing for Body and cover is metal to metal seal, improve the sealing performance.
2.stem and cover designed with backseat sealing structure is easy to take pressure change
valve stem packing.
3.The body is made of high quality alloy steel forgings, no perforation design, safe and reliable.
4.Sealing surface spray weld hard alloy, with corrosion resistance, resistance to erosion and wear resistance performance.
5.Body pad ring groove can according to user requirements overlaying austenitic stainless steel, improve the corrosion resistant ability; To enhance its service life.
6.Use spring preload load in the disc and seat, completely realize two-way seal.
Working pressure ：2000PSI～20000PSI
Nominal bore ：1.13/16″～9″ (46mm～230mm)
Working medium : oi , nature gas , mud , consist of H2S CO2gas
Working temp.：-46℃ ~ 121℃ (LU)