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Manual control valve structure and use
The author: Time:2020/11/18

  手动调节阀又称节流阀、膨胀阀,它的用途是将制冷剂液体的压力由冷凝压力降低到蒸发压力。当制冷剂液体通过调节阀节流后,其压力由高压降到所要求的低压,同时温度也降低。此外,调节阀还可以调节进入蒸发器的液体制冷剂量。
  调节阀的结构由阀体、阀芯、阀杆、填料压盖、上盖、手轮和螺栓等零件所组成。阀芯为针形或v型缺口的锥体,阀杆螺纹是细牙的,在调节供液量时可迟渐开启。调节阀开启的大小随负荷的变化而定。通常的开启度为1/8~1/4圈,一般不超过一圈,否则开启过大就起不到节流的作用。

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