| 摘要 |
<p>A temporary ball valve support structure is utilized to apply pressure on the ball in a ball valve so that a seal is maintained between the ball porti on of the valve and one seal member. This prevents fluid from leaking from the valve while the valve is being serviced by ensuring that there is a good seal between the ball valve and the seal closest to the fluid filled tank or pipe. The temporary ball valve support allows a outermost ball valve seal and the ball valve retainer housing assembly to be removed. This allows the outer seal and retainer to b e replaced and/or serviced without allowing fluid to be escape from the tank. First and second clamping members are alternately used to force the ball member against the seal closest to the fluid container.</p> |
