Flash back arrestor

Details Flash back arrestor Flash back arrestor

1974-04-29

1976-01-20

Lindsay, Jr., Robert L.

Gas: heating and illuminating

Distribution

Safety devices

48190, 48191, 137465, 222189, 431 22, F17D 300

Patent

active

039334449

ABSTRACT:
A flash back arrestor for use in gas supply lines. The arrestor includes an elongated passageway through which the gases flow in one direction and through which the flash back must pass in the reverse direction. A pressure-actuated valve at the inlet end of the passageway is actuated by pressures from the flash back at the discharge end of the passageway. The valve consists of a valve member in the form of a piston freely movable under the influence of flash back pressures against a valve seat at the inlet to the passageway. The valve member carries a locking arrangement which moves under the influence of the flash back to latch the valve member with a biasing force to the closed position after a flash back occurs. Additionally, a second valve is provided actuated by the flash back to vent the flash back to the atmosphere. A separate flow actuated check valve prevents backflow to the gas supply tank in the event the flow direction should reverse, not caused by a flash back.

REFERENCES:
patent: 3689239 (1972-09-01), Eriksson

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