VALVE; MODEL TYPE DESIGNATION: UNICHECK; BODY MATERIAL: DUPLEX2507; TRIM MATERIAL: DUPLEX 2507; PRESSURE SIZE: 275PSI; CLASS: CL 150; NOMINAL DIAMETER: 20”; CONNECTION TYPE: WAFER; POTTY TYPE: UPPER; OPERATING TEMPERATURE RANGE NO INFORMATION; METHOD OF OPERATION: SPRING; WORKING POSITION: NO INFORMATION; INTENDED USE: NO INFORMATION; STANDARDS AND SPECIFICATIONS: NO INFORMATION; ADDITIONAL FEATURES: NO INFORMATION; SUGGESTED MARKINGS: NO INFORMATION