RETENTION VALVE; TYPE: WAFER DISC SHUTTER ; NOMINAL DIAMETER: 16 IN; PRESSURE CLASS: 150 LBS; CONNECTION: BETWEEN FLANGES; BODY: ASTM A-4835B CAST IRON; DISC: BRONZE EN 12164 CUZN40PB2 R360; ADDITIONAL FEATURES: VITON SEALING RING; SEALING SEASON: EPDM; FACE TO FACE DISTANCE: 560.00MM; STANDARD: API 504; COMMERCIAL REFERENCE: SOCLA 402