Fuel tank emission control system that was equipped with a mechanical actuation isolation valve

摘要

The mechanical cable type operation isolation valve (20) is disclosed. This kind of valve (20) and as for the method of being related, the 1st component (24) the fluid the subrogation port which is connected (44) with, the 2nd component (22) the fluid the 2nd port which is connected (46) with, the 3rd component (38) the fluid the 3rd port which is connected (48) with, the valve (20) being arranged inside, the diaphragm (52) responding to the differential pressure which it crosses, closing the internal passage of normal opening, the 1st port (44) with the 2nd port (46) with the diaphragm which cuts off the fluid connection between (52) with, the diaphragm (52) the flow inspection pressure device which controls the differential pressure which is crossed (65) with it includes. Closing the internal passage of normal opening, the fluid flows the 2nd component (22) from the 3rd component (38) to. With illustrate execution form, the isolation valve of this invention (20) and as for method, although you use for the fuel tank emission control system, it is suitable. Selective figure Figure 3E