| 摘要 |
A mechanical automatic fluid consumption limiting apparatus for limiting flow through a primary flow line includes an actuating line, a control line, a rotary meter, a control assembly, an actuating valve, a diaphragm valve on the primary line, an eductor and an engagement controller. The actuating valve, initially spring-biased to a non-actuating position, is rotated to an actuating position effecting closure of the diaphragm valve responsive to a predetermined quantity of flow through the rotary meter and mechanical response of the control assembly. An eductor diaphragm is positioned within the eductor responsive to flow through the primary line and pressure from the actuating line. The engagement controller is connected to the eductor diaphragm. The control line by-passes the diaphragm valve to provide pressure within the eductor to re-position the eductor diaphragm after closure of the diaphragm valve. Such re-positioning causes linear displacement of the engagement controller to disconnect the control assembly connection of the rotary meter and the actuating valve, allowing the actuating valve to reset to an initial position, thereby relieving pressure in the diaphragm valve and allowing the diaphragm valve to reopen and allowing resumption of flow through the primary line.
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