TONGBALL valve co.,Ltd focus on producing Ball Valve Components over 10 years, Take advantage in metal to metal solution. Products are trusted and used for ball valves in various applications in any field (chemical, petrochemical, food and so on)PRODUCT RANGE:Ball Valve Components: BALL, SEAT, STEMMaterial: Stainless steel: F316(L), F304, F6A, F321, F44, 17-4PH Carbon steel: A105, LF2, 4140, F60Duplex & Super-duplex: F51, F53, F55Special Material: INCONEL 625, 825, 718; Monel 400, 500; HASTELLOY Size: 1/2" to 36", ANSI 150# to 2500#Standard: ASTM/ Nace/ ASMEMetal to metal balls, surface material : Tunsten Carbide, Chrome Carbide, Stellite, Nickel... Lapping: Lapping the metal to metal kit (ball and two seat); " gas-tight" test to ensure a perfect sealingCertificate: ISO 9000, CE, ISO14000Facility:Production located on 6000 ㎡ plant, over 90 qualified worker.