Hard Seal Ball Valve

A hard seal ball valve (metal-to-metal seated ball valve) is a heavy-duty, quarter-turn rotary isolation valve engineered with metallic seats and a metal ball utilizing advanced surface-hardening technologies to withstand severe service conditions that would destroy standard soft-seated valves. To combat accelerated erosion, friction binding, and thermal degradation, the ball and seat surfaces are case-hardened using specialized metallurgical processes—most notably High-Velocity Oxygen Fuel (HVOF) thermal spraying, which applies a dense tungsten carbide or chromium carbide coating reaching a hardness of 70-75 HRC, as well as hard chromium plating or plasma nitriding for lower temperature ranges. Severe-service pipeline contractors and power plant procurement managers can eliminate seating erosion and maximize operational lifespans by importing certified hard seal ball valves directly from specialized manufacturers in China via our advanced B2B commercial platform.