3" Cast Carbon Steel Flanged Swing Check Valve - 150# - Raised FaceWarren Valve 3" Cast Carbon Steel Flanged Swing Check Valve 150# Raised Face The Warren Valve 3V3155C 8R0G is a 3" cast carbon steel flanged swing check valve engineered to prevent reverse flow in industrial and commercial piping systems. Its swing type disc opens smoothly with forward flow and closes automatically when flow stops, safeguarding pumps, compressors, and other downstream equipment from backflow damage. Constructed to 150 lb class