| 摘要 |
<p>A remote controlled internal emergency valve for the outlet of a fluid transportation storage tank, operable by pressurized fluid, and including a spring biased plunger selectively engageable with a valve seat of an outlet port, to control the flow of fluid product from the tank. The valve is economical to produce and is easy to assemble, and includes a stationary piston partially defining an actuating pressure chamber which is coupled to a source of the pressurized actuating fluid, for actuating the reciprocal plunger off the valve seat. An exhaust chamber is provided in an inner cylinder of the valve structure for positively insuring that the actuating fluid for operating the valve can not contaminate the product content of the tank. The valve is so constructed and arranged that it is readily cleanable so that after a particular type of fluid product is carried in the tank, the valve can be expeditiously cleaned for use of the tank for another product.</p> |
