2" Cast Carbon Steel Flanged Swing Check Valve - 150# - Raised FaceWarren Valve 2V3155C 8R0G 2" Cast Carbon Steel Flanged Swing Check Valve 150# Raised Face The Warren Valve 2V3155C 8R0G is a 2" cast carbon steel flanged swing check valve designed to prevent reverse flow in commercial and industrial piping systems. Featuring a swing type disc that opens with forward flow and automatically closes when flow stops, this valve helps protect pumps, compressors, and other equipment from damage caused by backflow.