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A:The maximum permissible leakage of the valve with non-metal
elastic seals is zero, and that of the ball valve with meal seals
is0.1xDNmm3/S. Therefore, acceptable valves with metal seals possibly
have slight leakage. So, in the applications where must not be any
leakage, especially at the pipeline ends, ball valves with soft
seals should be used.
BIf the ball valve with pipe thread connection is connected with the
pipe threads on the pipe end, its female thread may be parallel or
tapered one, but its male thread must be tapered type. When
installing the valve, it is necessary to clamp the hexagonal or
octagonal position on the same side as its thread instead of the
hexagonal position on the other end of the valve, so as to prevent
the valve deforming.
CNominal pressure of brass ball valve is 1.6MPa, 2.5MPa, 4.0MPa, the
temperature is -20°C~120°C. When the valve is used for saturated
steam. The pressure of the saturated steam should be ≤0.6MPa.
DTo increase the service life of a ball valve, it should be full
opened or closed instead of partial opening for throttling purpose,
as when it is partially open, the flowing medium will erode the
ball and sealing
surface and thus affect the sealing performance of the valve
ball valve handles specification
Main Parts Materials:
Part Name | Material |
Body | SS CF8/CF8M |
Ball | SS 304/316 |
Seal Ring | PTFE/RPTFE |
Stem | SS 304/316 |
Packing | PTFE |
Lock | SS 304 |
Handwheel | SS 304 |
Stem Nut | SS 304 |
Glan d | SS 304 |
Handle Cover | Plastic |
Seal Cap | SS 304/316 |
Gasket | PTFE |