Emergency vent valve

Details Emergency vent valve Emergency vent valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 17/00 (2006.01) B60T 15/42 (2006.01)

Patent

CA 2160610

An emergency vent valve including a piston responsive to the differential pressure between the brake pipe and a control volume to open a vent valve to vent the brake pipe to atmosphere and includes an exhaust valve responsive to the differential pressure between brake pipe and control volume to connect the control volume to atmosphere through a service check and when the vent valve is opened through a second blow-down choke of a lesser rate which limits the exhausting of the control chamber. A choke valve connected to the piston connects the blow-down choke in series with the service choke when the vent valve becomes fully open. 1871

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