These valves have a metal to metal sealing.
Double block and bleed;
Cavity pressure self-relief;
Seats are sprayed with Tungsten Carbide HVOF(High Velocity Oxy Fuel) or overlay cladding coated with metal to metal contact between seats and ball. Hardness of coating surface: up to HRC68～ 72;
Bonding strength of coating: ≥10000Psi;
Thickness of coating: 0.3 - 0.5 mm;
Body material: carbon steel, stainless steel, alloy steel, exotics.
End connection: RF, RTJ, BW
Operation: wrench, worm gear, electric, pneumatic actuator, gas over oil actuator, electro-hydraulic actuator , etc.