BUTTERFLY VALVE DISC TYPE: CONCENTRIC; NOMINAL DIAMETER: 12.; BODY MATERIAL: GRAY CAST IRON; DISC MATERIAL: POLISHED AISI 316 STAINLESS STEEL; STEM MATERIAL: STAINLESS STEEL AISI 316; SEAT MATERIAL: FDA INFLATABLE WHITE SILICONE RUBBER; RINGS MATERIAL: STAINLESS STEEL AISI 316; END: MOUNTING BETWEEN WAFER FLANGES; STANDARD: ASME B16.1; PRESSURE CLASS: 125/150 LBS; TYPE OF OPERATION: PNEUMATIC ACTUATOR; FLUID: SINTER POWDER; WORK TEMPERATURE: 30 TO 100 DEGREES CENTIGRADE; WORKING PRESSURE: 4 TO 6 BAR; MANUFACTURER / POSI-FLATE REFERENCE: 486+890-2250DA+660U+649