MRE Modulating Electric Actuators

MRE Modulating Electric Actuators integrate multifunctional servo amplifier and position signal transmitter. Without any adjustable components on the control panel, all the operation such as Field setting parameters, sensitivity setting and automatic/manual switching are controlled by 4 buttons on the control panel, contributing to fast and simple installation and program setting. The display indicates the working status.

The control panel is installed inside the protecting case, directly receiving the 4-20mA signal from the DCS control system or other host computer control system. Interior potentiometer signal works as real time valve position feedback transmitter; making comparison with control signal coming from the DCS control system.

When the difference between the control signal and the feedback signal exceeds the sensitivity value settled, the working program demands the electric motor operates in the direction until the difference between the signals be less than the sensitivity value.

Download Technical Specifications



– Input Signal: 4-20mA, 0 – 10 mA
– Input Impedance: 250 Ω (4-20mA), 500 Ω (0 – 10 mA)
– Valve Position sensor: Single-Turn absolute value encoder
– Valve Position signal output: 4-20mA, 0 – 10mA Intrinsic error: ≤ ± 0.2%
– Motor blocking protection time: 1 – 25.4 Sec (default 6.4 Sec) Consumption Power: ≤ 3 VA
– Actuator operating sensitivity: (0.1 – 12.5)
– Insulation strength: Power frequency 1500V, 1Min.
– Insulation resistance: Above 50 Mega Ohm.
– Environment temperature: 0 – 55 °C.
– Relative Humidity: ≤ 85%.
– Power Supply: 220 Vac, 380 Vac, 50/60 Hz ± 10%, 24 Vdc
– Failure protection function for: Signal disconnection, no feedback, motor stop running(stalling).
– Protection function against instantaneous reverse rotation.
*Prior to implementing reverse action instruction, the control panel stop rotation with certain time delay (delay time is adjustable as per requirement) to prevent damage to electric motor, speed reducer, valve, others.
– Failure code warning function.
– One-Key calibration function.
– Passive feedback output for fully close position & fully open position.
– Warranty
– Technical Information.
– Quality Certificate.