| 摘要 |
<p>An impact valve with an easily replaceable, breakable valve assembly includes a valve body (30) with a valve opening for connecting to a vapor recovery pipeline connected between a vapor inlet and a vapor recovery tank, or connected between a gasoline product pipeline and a gasoline pump dispenser or self-contained system (i.e., a nonpressurized system), a housing threaded (34) to the valve body (32), a valve plug (40) located in the housing, a spring (42) for biasing the valve member toward the valve opening in order to close the opening, and a plunger (38) for holding the valve plug against the bias of the spring to keep the valve open, the valve plug having an extension with an end portion that securely mates with an end portion of the plunger to avoid necessary actuation, and the valve body having a weakened circumferential area around the plunger so that the valve body will readily break in response to impact and readily displace the plunger to release the valve plug.</p> |
