The tempering half-chiller valve on the flat glass tempering furnace is a simplified butterfly valve composed of valve plate, rotary shaft, connecting rods, pin, cylinder, cylinder support frame, and other components.

Driven by the telescopic action of the cylinder, the valve plate of the tempering half-chiller valve on the flat glass tempering furnace completes the rotation to throttle down the round tube outlet of the air distribution box in order to regulate the size of the blowing area by the blowers, making it possible to process thinner glass with blowers of the same power.