Cast Steel Fixed Hard Seal Ball Valve
Cast Steel Fixed Hard Seal Ball Valve
1. Trunnion-Mounted Design with upper and lower stem supports: The ball is secured by a mechanical shaft, ensuring stable movement under high pressure. Suitable for ultra-high-pressure applications in Class 150-2500 (PN16-PN420). Ultra-Low Torque: 60% lower operating torque than floating ball valves, suitable for automated control of large diameters (DN50-DN1200). Double Block and Bleed (DBB) valves comply with API 6D standards and are maintainable online.
2. Metal Seat
Sealing Surface Materials:
Carbide (STL cobalt-based alloy) → Temperature resistance up to 800°C, hardness HRC60+
Tungsten Carbide (WC) → Excellent wear resistance, suitable for media containing particles
316 with hard chrome plating → Economical choice
Sealing Grade: Up to API 598 Class V (the highest grade for hard seals)
3. Advanced Sealing Technology: Spring-Loaded Seat: Dual sealing by spring preload and media pressure
4. Self-Cleaning Design: The ball automatically scrapes away impurities as it rotates.
