6" Cast Carbon Steel Flanged Swing Check Valve - 150# - Raised FaceWarren Valve 6V3155C 8R0G 6" Cast Carbon Steel Flanged Swing Check Valve 150# Raised Face The Warren Valve 6V3155C 8R0G is a 6" cast carbon steel flanged swing check valve engineered to prevent reverse flow in commercial and industrial piping systems. Its swing type disc opens with forward flow and closes automatically when flow stops, protecting pumps, compressors, and other downstream equipment from backflow damage. Built to 150 lb class standards