Piston Forged Check Valve Class 800 - R800 | ICP Valves Forged Check Valve Class 800 - R800 | ICP Valves The Forged Check Valve Class 800 - R800 by ICP Valves is a high-quality, uni-directional piston check valve designed for reliable performance in various industrial applications. It features a reduced bore design and is available with socket weld (SW) ends conforming to ANSI B16.11 or NPT threaded ends according to ANSI B1-20.1 standards. The valve is... View NPT Socket Weld 800 lbs ANSI ASTM A105 ASTM A182 F316