Main performance and test of electric control valve

Source: Internet Release Date: 2012/3/8
Main performance and test of electric control valve: Electric control valve主要性能指标有:基本误差、回差、死区、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、温度、长期工作可靠性、防爆、阻尼特性、电源电压变化影响、环境温度变化影响、绝缘电阻、绝缘强度等。前10项指标的要求和试验方法均与气动阀相同或相似,其中基本误差、回差、死区、泄漏量、密封、外观、阻尼特性、电源电压变化影响、绝缘电阻为出厂试验项目,后3项性能指标的要求和试验方法为: 1)阻尼特性电动调节阀的阻尼特性,在正、反行程的两个方向上规定为阀杆不超过3次“半周期”摆动。试验方法是在输入端分别加入输入信号范围值的20%、50%、80%信号,观察阀杆在正、反行程相应位置上“半周期”摆动次数。 2)电源电压变化影响电动调节阀的供电电压在220+20-30V范围内变化时,阀杆的位移变化值不应超过全行程的1.5%。试验方法是在电源电压为 220V时,在输入端加入信号范围值的20%的信号测量相对应的阀杆行程值,然后将电源电压调到190V和240V,测量相对应的阀杆行程变化值。再依次加入信号范围值的50%、80%的信号、测量阀杆行程的变化值。 3)绝缘电阻当环境温度为10~35℃、相对湿度不超过85%时,Electric control valveThe insulation resistance should meet the following requirements: each input terminal to the chassis is not less than 20MΩ; each input terminal to the power terminal is not less than 50MΩ; the power terminal to the chassis is not less than 50MΩ.The test method is to use a 500-type megohmmeter to test.
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