| 摘要 |
An isolation valve (20) includes a flow restrictor (50) disposed in a passage (56) and having a piston (52) with a first orifice (49) and a depressurization valve (50a) with a second orifice (50b). The valve (20) also includes a solenoid valve assembly (40) having a coil (46) that is selectively energized by a signal from a controller (14) and an armature (42) that is moveable between first and second positions to open and close the first orifice (49) and/or the second orifice (50b). When the coil (46) is energized, the armature (42) moves to the second position to allow vapor to flow through the first orifice (49), the depressurization valve (50a) selectively opens to allow vapor to flow through the first orifice (49), the second orifice (50b), or both. The two orifices (49, 50b) work together to provide controlled vapor flow. |
