Through developing a new double - location butterfly valve, the problem of adjusting the size of the fire on heat treatment furnace can be solved. The new double - location butterfly valve increase the reliability and life - span, it also improve the control stability and life - span of heat treatment furnace of using gas.%通过一种新型双位蝶阀的研制和使用,解决了热处理炉大小火调节的问题,并且提高了双位蝶阀的可靠性和使用寿命,大大提高了火焰式台车热处理炉的炉温控制稳定性和使用寿命.
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