Pneumatic - valve rated travel deviation need how decompression? In order to keep the gas Industrial Valves can close in place, need to add 120% signal to actuator chamber, from 100% 120% signal stem walk trip and the ratio of the rated stroke, this is rated travel deviation. If only some basic error, so the regulation of the input signal smoothly by direction input actuator (increase/decrease Or locator) , measurement of the value, the actual 'signal - Trip 'relationship with the theory of error can be calculated at various points between the maximum is basic error. Basic error measuring instrument should be less than a quarter of basic error limits the check Industrial Valves. Test points should include at least the signal range 0%, 25%, 50%, 75%, 100%, the five points. Pneumatic control valve is a control is simple, quick response, intrinsically safe product, do not need another explosion protection measures. Pneumatic control Industrial Valves leakage need to check for 10 - test medium Clean gas 50 ℃ ( Air or nitrogen) Or liquid ( Water or kerosene) 。
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