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DHP Quarter-Turn Valve Actuator


Enclosure may vary depending on the specifications of the product (water-proof/explosion-proof, Single-Phase/Three-Phase Power).


RPMTECH's DHP Quarter-Turn Series products are Electro-Hydraulic Actuators built for quarter-turn valves (Butterfly Valves, Ball Valves, Plug Valves, etc.). The DHP Quarter-Turn Series is a compact, all-in-one solution that is capable of advanced control modes and supports various types of installation (separate installation of the DHP Power-pack and the hydraulic cylinder) for maximum versatility. The actuators do not require a gearbox (the cause of many breakages) allowing for direct and efficient delivery of power for reliable use.  The DHP Quarter-Turn Series is equipped with two motor pumps, which translates to twice the speed of the MHP Quarter-Turn Series.


  • Compact, All-in-one Electro-Hydraulic Actuator

  • Does not require gearbox: direct power delivery (high efficiency)

  • Modular design (easy maintenance)

  • Equipped with patented manual hand pump

  • Various installation types (able to install actuator and hydraulic cylinder separately for safety and ease of use)

  • Limit settings and parameter settings are easily accessible

  • Self-diagnosis capabilities and password lock for added security

  • Various advanced control modes (refer below to Control Modes)

  • Audible and visible alarm during abnormality

  • Supports various communication platforms (AIO/DIO, Profibus, etc.)

  • Able to equip with Fail-Safe mechanisms (refer below to Fail-Safe Options)


  • Power: Single-Phase AC 110~220V (50/60 Hz) or Three-Phase AC 380~460V (50/60Hz)

  • Enclosure Rating: IP68 Water-proof or Exd II B T4 Explosion-proof

  • Motor Specs: Bidirectional 0.6kW BLDC Motor (DHP Series: 1.2 kW)

  • Torque Range: 600 Nm ~ 32,000 Nm (Contact for higher torque)

  • Minimum Open/Close Time by torque:

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Certifications vary by product specifications.



Electro-Hydraulic Valve Actuators

Electro-Hydraulic Actuators are driven by the hydraulic pressure generated from an electric motor, which is then delivered to the hydraulic cylinder to control the valve.

Compact and All-in-One

Advanced Software

Safe and Reliable

RPMTECH actuators are equipped with hydraulic pressure generators, a high tech controller, and a manual hand pump based on patented technology. The compact, all-in-one design and the modular installation capabilities makes the actuators versatile and easy to conduct maintenance.

RPMTECH actuators support a variety of communication platforms to best fit the needs of the end user. The user can access virtually all settings and advanced control modes via the LCD display. The self-diagnosis feature allows for simple maintenance and maximum efficiency.

RPMTECH actuators are engineered (both software and hardware) to maximize the safety of the user and enhance the reliability of the product. The manual hand pump is engineered based on patented technology and adds more reliability especially during a power loss or emergency. Also, Modular Installation allows for the actuator to be installed at a safe and accessible location.

Actuator Configuration Example

DHP Quarter Turn Valve Actuator

Explosion-proof, Single-Phase, 2200mm Hydraulic Cylinder


Point of Attachment

Butterfly Valves, Ball Valves, Plug Valves

Position Meter

Manual Hand Pump

Built on Patented Technology

Actuator Controller

Controller + Display + Local Switch

Hydraulic Pressure Generator

DHP (Dual Hydraulic Powerpack)

Hydraulic Cylinder

2200 mm Double-Acting Cylinder


Control Modes

Control Modes

Control modes optimized for flow controlwater-hammer absorption, and valve disk protection

Open / Close

Open and Close at constant speed where the speed is configurable.

(applicable to all models)



Maintains valve at a certain position (configurable every 1%).


Speed Control

The Open/Close operation is divided into 3 sections where the speed and stop time in each section is configurable.



Step Control

Actuator operates slowly at a constant interval to overcome the minimum operating speed of the motor. Absorbs water hammering and increases fluid stability.


*Desired Control Mode(s) must be stated in the Request Quote Form below.

Fail-Safe Options

Fail-Safe Options

Opens or Closes the valve during power loss or emergencies

Spring Return Type:


The hydraulic pressure used to operate the valve simultaneously compresses the spring within the cylinder. During a power loss or emergency, the energy compressed in the spring is released and the hydraulic fluid is directed via the solenoid valve to open or close the primary valve.

Counterweight Type: 

The hydraulic pressure used to operate the valve simultaneously lifts and stores potential energy in the counterweight. During a power loss or emergency, the stored energy is released and the hydraulic fluid is directed via the solenoid valve to open or close the primary valve.

UPS (Uninterruptible Power Supply):


The UPS is essentially a backup power source that is useful during a power loss or emergency. The absence of auxiliary mechanical parts allows for the addition of Fail-Safe features at a lower cost.








*Desired Fail-Safe Option must be stated in the Request Quote Form below.

Request Quote

Request Quote

Useful details to include: Power (Single-Phase or Three-Phase), Torque (Nm), Enclosure Rating (Water-proof or Explosion-proof), etc.

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유지 보수 설명서

Maintenance Manual


 사용자 설명서

User Manual

Document Title

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Screen Shot 2020-07-16 at 10.10.45
Screen Shot 2020-07-16 at 10.10.45
Screen Shot 2020-07-16 at 10.10.45
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