ZYB slag pump regulating pneumatic valve test method and the main performance is what?

ZYB slag pump adjustment test method of the pneumatic valve and main performance:
. Pneumatic control valve main performance and testing:
pneumatic regulating performance of the pneumatic valve are: basic error, return difference, dead zone, has some deviation, rated travel deviation, leakage and sealing, compression strength, appearance, rated flow coefficient, the intrinsic flow feature, vibration resistance, longevity, meter, for the factory inspection items referred to in the preceding paragraph. ZYB slag pump to transport by regulating pneumatic valve, the work scope of spring adjustment factors, such as, before the installation is often necessary to adjust the following performance, inspection:
) Basic error will be stipulated by the input signal is smoothly according to the direction of increase and decrease the input actuator air chamber ( Or locator) , all point mooring Thai state measurement of the travel value, calculate the actual 'signal - stroke' relationship with the theory of relationship between each point error. Its maximum value is the basic error. Sites should include at least the signal range, %, %, %, % this point. Basic error measuring instrument limit should be less than the subjects/pneumatic valve basic error limits.
) Return difference test procedure as above the first) At the same. On the same input signal is measured by the positive and negative the biggest difference is the trip back to the poor.
) Always point deviation method with the first) Points. The signal limit ( Starting point) Is the starting point of basic error deviation; The lower limit of the signal, At the end) The basic error of end point deviation.
) Rated travel deviation will join the actuator rated input signal chamber ( Or locator) , make the pneumatic valve rod go all the way, the difference between the actual travel and rated stroke and the ratio of the rated stroke is rated travel deviation. The actual stroke must be greater than the rated stroke.
) Leakage test medium for ℃ ~ clean gas ( Air and nitrogen) Or liquid ( Water or kerosene) ； Test pressure A program as follows: when the permission of the pneumatic valve differential pressure is greater than the KPa, testing pressure are made to KPa, less than KPa made to allow the differential; B test procedure according to the maximum working pressure difference of pneumatic valve. Pressure test signal shall ensure pneumatic valve closed. When A test procedure, gas drive pressure pneumatic valve actuator signal to zero; Breath gas dynamic pressure valve actuator signal as the input signal limit on KPa; Two type pneumatic valve actuator signal pressure shall be the design specified value. In the B test program, signal pressure shall be the design of the actuator specified value. Test medium shall be in accordance with the provisions, to join in the pneumatic valve, pneumatic valve can be connected directly through the atmosphere or export atmospheric low head loss measurement device, when confirm the connection on the lower reaches of pneumatic valve and pipe filled with medium and then measurable leakage completely.
。 Main performance and test electric regulating pneumatic valve:
electric regulating pneumatic valve key performance indicators are: basic error, return difference, dead zone, rated travel deviation, leakage, impermeability, compression strength, appearance, rated flow coefficient, ZYB slag pump the intrinsic flow feature, resistant to vibration, temperature, long-term working reliability, explosion-proof, damping characteristics, power supply voltage change, environmental temperature change, insulation resistance and dielectric strength, etc. Index requirements and test methods are referred to in the preceding paragraph shall be the same or similar with pneumatic pneumatic valve, in which the fundamental error, return difference, dead zone, leakage and sealing, appearance, damping characteristics, power supply voltage change, insulation resistance for factory test project, consequent performance requirements and test methods as follows:
) Damping characteristics of electric adjust the damping characteristics of pneumatic valve, as is, the schedule is provided in the two directions for pneumatic valve lever does not more than 'half a period'. Test method is in input respectively to input signal range value %, %, % signal, observe the pneumatic valve stem in positive and revesal corresponding position 'half cycle oscillation frequency.
) Power supply voltage changes affect electric to adjust the power supply voltage of pneumatic valve in + - V range change, pneumatic valve rod displacement change value should not be more than the whole trip. ％。 Test method is in the power supply voltage V, in the input signal range value % signal measurement corresponding pneumatic valve stem travel value, then the supply voltage to the V and V, measure the corresponding pneumatic valve stem travel change value. To join in turn signal range value %, % of the signal, measuring the change of the pneumatic valve stem travel value.
) Insulation resistance when the environment temperature for ~ ℃, relative humidity no more than %, electric regulating pneumatic valve of the insulation resistance shall meet the following requirements: ZYB slag pump each input terminal to case not be less than M Ω; Each input terminal of power terminal is not less than M Ω; Power terminal is not less than M Ω chassis. Type test method is to use megger test.