The DKZ series linear electric actuator is a core terminal execution unit for industrial process measurement and control systems. It receives standard analog signals such as 4-20mA DC from regulators or control systems. Through its internal servo amplification system, it converts instructions into axial thrust, driving various linear stroke control valves (such as single-seated, double-seated, or cage-guided valves) in linear reciprocating motion. The DKZ series combines classic mechanical transmission with electronic control technology to precisely regulate fluid flow, pressure, and temperature. Known for its robust structure, stable thrust output, and mature technology, it is widely used in automated control pipelines across power, metallurgy, chemicals, building materials, and water treatment industries.

Product Image of DKZ Series Direct-travel Electric Actuator

1.Classic mechatronic design:The built-in electronic servo control unit enables closed-loop proportional regulation without an external amplifier, simplifying wiring and reducing system complexity and failure rates.
2.High-precision linear thrust output:Precision reduction gears combined with a high-strength lead screw ensure a strict linear relationship between output shaft displacement and the control signal, offering minimal hysteresis and excellent repeatability.
3.Reliable mechanical self-locking:The transmission mechanism features inherent self-locking properties. In the event of a power failure or signal loss, the actuator reliably holds the valve position, preventing instability caused by medium pressure fluctuations.
4.Comprehensive protection and feedback:Equipped with built-in electrical limit switches and overload protection to prevent damage from over-travel or stalling. A high-precision position transmitter provides real-time 4-20mA feedback to the control room.
5.Emergency manual override mode:Standardized with an independent handwheel mechanism, allowing operators to manually intervene during power outages, commissioning, or emergency repairs, ensuring 24/7 operability.
6.High environmental resistance:The die-cast aluminum alloy housing with industrial-grade anti-corrosion coating provides excellent sealing against dust, moisture, and corrosive gases, adapting to harsh field conditions.
7.Broad compatibility and interchangeability:Mounting dimensions comply with international standards, allowing for easy integration with various control valve brands. This facilitates system upgrades and onsite maintenance.
8.Ease of maintenance and long service life:Core transmission components feature long-term lubrication for low mechanical wear. The modular control system allows for rapid diagnosis and replacement of faulty parts.

Structural Drawing of DKZ Series Direct-travel Electric Actuator

Main Technical Parameters
Input Signal:0-10mA DC, 4-20mA DC
Input Resistance:220Ω (Type II), 250Ω (Type III)
Input Channels:3 isolated channels
Basic Error:±2.5%
Hysteresis:±1.5%
Dead Zone:≤3% (1-3% adjustable)
Pure Lag:≤1s
Power Supply:220V AC, 50Hz
Environmental Conditions:(1)Ambient Temperature:Actuator -10 to +55°C (2)Relative Humidity:Actuator ≤95%

Outline dimension table