KATA Metal seal trunnion mounted ball valves are offered in cast steel turnnion mounted ball valve or forging steel turnnion mounted ball valve. The valve seating surface are integral or faced with weld metal .Under the bottom of seats, seat pre-loading springs are positioned to ensure two floating seats can attach the ball's surface tightly, other more, pressure of medium also can push seats to attach ball tightly to ensure sealing more reliable.
The trunnion ball valve is equipped with a movable seat seal ring which can generate displacement under the pressure of medium. In case that any medium pressure exists, the pressure will press the valve seat seal ring onto the ball tightly, guaranteeing the sealing performance of the ball valve.
Compared with soft seal ball valves, metal-to-metal ball valves have wider working temperature and medium range. During working condition, it has the features of reliable and safe sealing performance, long service life, easy operation and less pressure loss. It's mainly used in service of high temperature, high pressure, severe corrosion and solid material containing services, such as coal chemical, polysilicon and vitriol/ nitric acid industry.
Design standard: ISO 14313, AIP 6D, BS 5351, GB/T 12237, GB/T 19672, API 607/6Fa
Full bore/Reduce bore
Anti-blow out stem
ISO 5211 Std. Top flange connection
DBB (Double block and bleed)
DIB-1/DIB-2 (Double Isolation and Bleed)
Low temperature packing
Emergency grease injection device
Cavity pressure self relief
Nominal diameter: 2"~36"(DN15~900)
Pressure range: Class 150~2500(PN20~PN420)
Body material: ASTM A216 WCB/ASTM A105N
ASTM A352 LCB ASTM A350 LF2
ASTM A351 CF8/CF3 ASTM A182 F304/F304L
ASTM A351 CF8M/CF3M ASTM A182 F316/F316L
Trims material: ASTM A105+ENP
ASTM A350 LF2+ENP
ASTM A182 F6a
ASTM A182 F304/F304L
ASTM A182 F316/F316L
ASTM A182 F51
ASTM A564 17-4PH
Seals material: Surface Nitriding, TCC, 13Cr, 304, 316, STL, INCONEL, MONEL, HASTELLOY ALLOY, Cu, ETC..
VITON, HNBR, EPDM, LIP SEAL, PTFE+VITON, Graphtie, PTFE, ETC.
End connection: RF, RTJ, BW;
Operator type: Wrench, Worm gear, Electric actuator, pneumatic actuator, gas over oil actuator, electro-hydraulic actuator, ETC.
Working temperature: -46~550℃
Medium:Water, gas, oil, etc.