ZPD-0121 Type Electro-Pneumatic Valve Positioner

Zpd-1000 series electric valve positioners supplied by Changyang instruments include: zpd-01; zpd-02; zpd-0121; zpd-0122; zpd-1111; zpd-1112; zpd-1121; zpd-1122; zpd-1211; zpd-1221; zpd1000 series electric valve positioners are one of the industrial automation instrument varieties, and are the main supporting instruments of pneumatic actuator (pneumatic control valve). It is used to overcome the unbalanced force caused by the pressure difference of the control valve and improve the linearity of the valve position, so that the stroke (valve opening) of the regulating valve is proportional to the current signal of 4-20mA or 0-10madc output by the regulating instrument, so as to realize the correct positioning.

Main Specifications

Note：* Double acting type

Linearity：      ≤±1％ (SA), ≤±1.5％ (DA)

Hysteresis Error：≤1％  (SA),    ≤1.5％  (DA)

Dead Band：    ≤0.4％ (SA),   ≤0.6％  (DA)

Air Consumption：≤1.5Nm³/h (SA)

Input Resistance：250±10Ω (4~20mA)

               1000±30Ω (0~10mA)

Standard Stroke： 10~100mm (Linear Motion),  50°~90°(Rotary Motion)

Control Action：  Direct Action, Reverse Action

Ambient Temp.：  -25~55℃ (Standard Type)； -25~40℃ (Explosion-protection Type)

Relative Humidity：5％~100％

Insulation Resistance：≥20MΩ

Supply Press. Effect：±1％ (Supply press. changes at ±10％ of rated values)

ZPD-0121 Type Electro-Pneumatic Valve Positioner