Class 900 Pressure Seal Check Valve 22 Inch WC9 Pressure Seal Check Valve Class 900 Forged Steel Pressure-Seal Gate Valve Pressure Seal Check Valve 3 Inch Class 900 Gate Valve 4 Inch Class 900 Globe Valve 6 Inch Class 1500 Pressure Seal Gate Valve Pressure Seal Swing Check Valve High Pressure Seal Check Valve Pressure Seal Type Check Valve