Caliber Valves Pvt. Ltd. Manufactures Non Slam Check Valves. Caliber Valves Pvt. Ltd. Is an ISO 9001-2000 certified company. The Non Slam Check Valves are used in various industries. Specifications of Non Slam Check Valves are: Complies Manufacturer Standard Sizes 15mm to 150mm Material ASTM A351 Gr. CF8 / CF8m Trim AISI 304 / 316 Type Spring Loaded, Universal Mount Rating Class 150 Ends Wafer