초록 ▼

A fluid leak detector has a body with a chamber provided with a fluid inlet and outlet. A valve is disposed between the inlet and outlet and the valve closure member is connected to a diaphragm. Fluid in the chamber applies pressure on the diaphragm and the detector includes means which allow the va

A fluid leak detector has a body with a chamber provided with a fluid inlet and outlet. A valve is disposed between the inlet and outlet and the valve closure member is connected to a diaphragm. Fluid in the chamber applies pressure on the diaphragm and the detector includes means which allow the valve to be open at a pressure greater than a predetermined value and cause the valve to close at pressures below that value, which may be due to a fluid leak. The detector has a safety lock-off mechanism which locks the valve once it has closed and which must be reset to allow the valve to open when fluid pressure has been restored. The detector also provides a visual indication of fluid leaks. A fluid supply installation incorporating the fluid leak detector will shut down the fluid supply if a leak is detected.

대표청구항 ▼

A fluid leak detector comprising: a body member having a chamber provided with a fluid inlet and a fluid outlet, between which is disposed a valve having a valve closure member, the closure member being connected to a diaphragm, the arrangement being such that when fluid is present in the chamber it

A fluid leak detector comprising: a body member having a chamber provided with a fluid inlet and a fluid outlet, between which is disposed a valve having a valve closure member, the closure member being connected to a diaphragm, the arrangement being such that when fluid is present in the chamber it applies pressure on the diaphragm; the detector further including means for controlling closure of the valve such that the valve is allowed to be open when the pressure differential across the diaphragm between the fluid pressure at said inlet and the ambient pressure external to the body exceeds a predetermined value and that the valve is caused to close when said pressure differential is below said predetermined value; the detector further including safety lock-off means for locking the valve into position when closed, and means for allowing the lock-off means to be released to allow the valve to open in response to a pressure differential across the diaphragm greater than or equal to said predetermined value and means providing a said indication that a pressure differential below said predetermined value has occurred since preceding release of the lock-off means.