Valves
Electric-Pneumatic Valve Locator
Features
Electric-Pneumatic Valve Locator
ZPD-2000 electric-pneumatic valve locator is main matching meter in industrial automation of pneumatic actuators, can be used for improving valve position of linearity, overcome the stem friction and eliminate regulator unbalance force influence etc, thus ensuring the valve position by adjusting instruments 0-10MA. DC or 4-20MA, DC current signal is proportional relation, achieve correct positioning. Electric-pneumatic valve locator can match pneumatic diaphragm actuators, also can equip with pneumatic piston actuators, Shanghai Fengqi locators have double functions of electric-pneumatic converter and pneumatic valve locator. Therefore, it is widely used in petroleum, chemical, metallurgical, power, textile, paper and other industrial automation, is the indispensable product in industrial automation instrument.
main technical parameters
| equipped valve | pneumatic diaphragm regulator | pneumatic piston regulator | angle stroke regulator |
| input current | 0～10（0～5、5～10） 4～20（4～12、12～20） | ||
| impedance | signal 0～10MA.Dc product：1000±300Ω signal 4～20MA.Dc product：300±10Ω |
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| air supply pressure | 0.14～0.25 | 0.25～0.5 | 0.25～0.5 |
| valve stroke | 10～100mm | 10～100mm | 50～90 |
| intrinsic error | ≤±1 | ≤±1.5 | ≤±2 |
| back differential | ≤1 | ≤1.5 | ≤2 |
| dead zone（％） | ≤0.4 | ≤0.6 | ≤0.8 |
Specifications table
| type | input signal Ma(D.C) |
air supply pressure MPa |
output pressure MPa |
equipped actuator | stroke scope | explosion-proof type | input impedance Ω |
| ZPD-2111 | 4～20 | 0.14 | 0.02～0.1 | pneumatic diaphragm | straight stroke 10～100mm angle stroke 0～90 |
EEx e (eⅡT6) exd (dⅡBT6） Exi （iaⅡCT6） |
300 |
| ZPD-2112 | 0.25～0.30 | 0.04～0.2 0.06～0.18 |
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| ZPD-2121 | 4～12 12～20 |
0.14 | 0.02～0.1 | ||||
| ZPD-2122 | 0.25 | 0.04～0.2 0.06～0.18 |
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| ZPD-2131 | 0～10 | 0.14 | 0.02～0.1 | 1000 | |||
| ZPD-2132 | 0.25 | 0.04～0.2 | |||||
| ZPD-2141 | 0～55～10 | 0.14 | 0.02～0.1 | ||||
| ZPD-2142 | 0.25 | 0～0.5 | |||||
| ZPD-2211 | 4～20 | 0.5 | pneumatic piston | 300 | |||
| ZPD-2221 | 4～12 12～20 |
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| ZPD-2231 | 0～10 | 1000 | |||||
| ZPD-2241 | 0～5 5～10 |
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