Safety device for cutting off gas pipelines
First Claim
1. A safety device for cutting off a gas pipeline above a predetermined temperature, the safety device comprising:
- a check valve to prevent a backflow from a portion of a gas pipeline situated downstream to the safety device; and
a pressure-sensitive element coupled to a cut-off valve in such a way that in case of rising pressure in the pipeline, the cut-off valves stops the gas flow through the pipeline, the pressure-sensitive element pressurized by a pressure prevailing in the downstream portion of the pipeline being located within the gas pipeline, the check valve for preventing the backflow formed by the cut-off valve being situated within the gas pipeline upstream to the pressure-sensitive element.
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Accused Products
Abstract
A thermal safety device for cutting off gas pipelines, wherein gas transfer is prevented by the safety device when temperature increases in the section of the gas pipeline placed downstream from the safety device, especially when connected gas apparatuses are in a closed position maintains production costs and dimensions at a level as low as possible. The safety device includes a check valve which prevents backflow from the gas pipeline which is placed downstream from the device. The inventive device also includes a pressure sensitive element placed downstream from the safety device which is actuated by the pressure in the pipeline. The pressure sensitive element is coupled to a cut-off valve in such a way that when pressure increases in the downstream pipeline the valve prevents gas from flowing into the pipeline.
78 Citations
20 Claims
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1. A safety device for cutting off a gas pipeline above a predetermined temperature, the safety device comprising:
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a check valve to prevent a backflow from a portion of a gas pipeline situated downstream to the safety device; and
a pressure-sensitive element coupled to a cut-off valve in such a way that in case of rising pressure in the pipeline, the cut-off valves stops the gas flow through the pipeline, the pressure-sensitive element pressurized by a pressure prevailing in the downstream portion of the pipeline being located within the gas pipeline, the check valve for preventing the backflow formed by the cut-off valve being situated within the gas pipeline upstream to the pressure-sensitive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification