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Performance index of pneumatic control valve
The author: Time:2019/9/11

       气动调节阀的性能指标有:基本误差、回差、死区、始终点偏差、额定行程偏差、泄漏量、密封性、耐压强度、外观、额定流量系数、固有流量特性、耐振动性能、动作寿命。
   (1)基本误差 将规定的输入信号平稳地按增大和减小方向输入执行机构气室,测量各点所对应的行程值,计算出实际“信号-行程”关系与理论关系之间的各点误差。
   (2)回差 在同一输入信号上所测得的正反行程的差值即为回差。
   (3)始终点偏差 信号的上限处的基本误差即为始点偏差;信号的下限处的基本误差为终点偏差。
   (4)额定行程偏差 将额定输入信号加入气动执行机构气室,使阀杆走完全程,实际行程与额定行程之差与额定行程之比即为额定行程偏差。实际行程必须大于额定行程。

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