Through dividing electronic expansion valve from evaporator system and based on constant gain of superheat open loop rule, the compensation theory of valve head was analyzed.
通过将电子膨胀阀与受控对象(蒸发器)细化分开来，并依据恒定开环增益准则从理论上分析了阀头补偿原理。
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The numerical control index head was adopted, so the milling machine can process the machine parts as the gear, the worm gear, with the digital loop control method, it has high processing precision.
The loss of efficient head of circulation pump in the primary loop of PWR will increase with the increase of resistance coefficient of JetPump under forced circulation.