FIELD: mechanics.
SUBSTANCE: method for making valve travel from the fist stationary position into the second stationary position uses a valve and a seat. Valve sealing is effected by moving it towards the seat. The valve is in the first stationary position. The valve sealing force is reduced to the level allowing breaking the said sealing. The valve moves to the second stationary position. The valve in said second stationary position, the sealing force is again applied to the valve. There are also an appliance to reduce valve travel friction and a unit incorporating such valve.
EFFECT: invention ups the valve sealing reliability and downs its wear.
23 cl, 28 dwg
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