The working principle of trunnion ball valve is to control the opening or closing of the pipeline by rotating the ball. In the closed state of the valve, the valve ball and gasket seal, the pipeline medium can not flow through, when rotating the ball to the open position, the pipeline medium can flow unimpeded. API 6D trunnion ball valves are mainly applied to the cut-off action of gas and liquid media. With compact structure, stable performance, easy and convenient operation, this kind of valve is widely used in the fields of construction, ship, natural gas and so on.
API 6D trunnion type ball valve Specification
| Design | API 6D |
| End Connection | RF, RTJ, BW |
| Operation | Manual/Pneumatic/Electric |
| Size Range | NPS 2"-60"(DN50-DN1500) |
| Pressure Rating | ASME Class 150~2500(PN16~PN420) |
| Body Material | Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel |
| Seat Material | PTFE, RPTFE, PEEK, NYLON, DEVLON |
| Temperature | -46℃ to 250℃ |
API 6D trunnion mounted valve
6D valve VS 6A valve
1, the same caliber 6A volume is smaller than 6D
2, the specification of the pressure level 6A is larger than 6D
3, the specification of the temperature 6A is smaller than 6D
Supplement: Although 6A also have X, Y two levels, but very rare
4, 6D valve body carbon steel more, but in 6A carbon steel is basically extinct, although it can be used, the basic use of low carbon alloy steel above
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