| 摘要 |
A gas flow safety valve assembly having a main housing of generally solid rigid construction with a main interior chamber divided into an upper compartment and a flow through compartment by a primary diaphragm. Further, the main housing includes an inlet passage leading into the flow through compartment and an outlet passage leading out of the flow through compartment. Upon a gas flow pressure within the flow through compartment dropping below a predetermined minimum acceptable gas flow rate, the primary diaphragm is downwardly displaced resulting in the engagement of a primary displacement member connected thereto with a lever element pivotally positioned within the main housing. The lever element which has a contact plate that engages a magnetic element disposed in the main housing is movable between a shut off orientation and a flow through orientation, the shut off orientation resulting in a blockage of gas flow through the outlet passage until the assembly is reset and the lever element is held in its flow through orientation by a lever biasing element that is sufficiently strong to maintain the lever element in its flow through orientation unless it is affirmatively urged into its shut off orientation, such as by the primary lever misplacement member.
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