Caliber Valves Pvt. Ltd. Manufactures SS 3P Ball Valves. Caliber Valves Pvt. Ltd. Is an ISO 9001-2000 certified company. The SS 3P Ball Valves are used in various industries. Specifications of SS 3P Ball Valves are: Complies BS 5351 Sizes 10mm to 50mm Material SS - ASTM A351 Gr. CF8 / CF8M Trim AISI 304 / 316 Type Full Bore, Three Piece Rating Class 150 / 300 Ends Screwed / Socket Weld