FIELD: military equipment.;SUBSTANCE: valve chest of venting unit is provided with mechanism of spring-loaded latch with electromagnet which operates at firing. Stem secured on valve is engageable with limit switch; valve stem has slot with inclined plane engageable with respective plane of spring-loaded latch. Handle is secured on stem and spring is used for opening the valve. When valve is opened, limit switch disconnects power supply of latch mechanism and switches-on the fan. When valve is closed, limit switch switches-off the fan and closes the circuit for supply of power to latch mechanism which is provided with manual control button.;EFFECT: enhanced operational safety due to automatic opening of valve.;3 cl, 1 dwg
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