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DK Series

DK Series High-Integrity Multi-Functional Electric Actuator for Industrial Valve Automation-Switch Type

DELCO's Electric Actuator is an angular stroke device designed for automated valve control. It offers ON/OFF, Regulation, and Intelligent control modes. The actuator features a hard aluminum alloy body with hard anodic oxidation and Polyester powder coating, ensuring excellent corrosion resistance and IP65 protection. Its turbo-worm structure guarantees high torque output and reliable self-lock functionality.

Materiall: Aluminum alloy

Protection Grade:IP65

Type: On-Off,Regulation,Intelligent

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Selection Manual

Features

Diverse Control Modes and High Ingress Protection Design

✅ Versatile Control Modes for Automation: Available in ON/OFF, Regulation, and Intelligent types, supporting multiple control signals (DC 4-20mA, DC 0-10V, DC 1-5V). It also supports field bus protocols like MODBUS and PROFIBUS for remote switch or regulation control.

✅ Robust, Corrosion-Proof Enclosure: The body is constructed from hard aluminum alloy , treated with hard anodic oxidation and coated with Polyester powder, providing superior corrosion resistance and a standard waterproof protection class of IP65 or even higher.

✅ High-Efficiency Self-Locking Drive Mechanism: Features an accurate turbo-worm structure, ensuring large torque output with high efficiency and minimal noise (Max. 50 decibels). The drive part is stable, reliable, and includes an integral self-lock function to prevent reverse rotation.

✅ Overheat-Protected, High-Torque Motor: Utilizes a fully enclosed cage-type motor that is small in size but large in torque. The motor has F-grade insulation , effectively preventing overheating and ensuring a long service life.

✅ Reliable Manual Override and Indicator: Equipped with an energy-saving and reliable small handle for manual operation when electricity is off. The outside mirror design indicator, assembled on the center axis, facilitates position observation and prevents water accumulation.

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Actuator Overview Dimensions Technical Specifications

Item	Description
ON/OFF Type	Feedback: the active contact signal, passive contact signal, resistant, 4–20mA
Regulation Type	Input & Output signal: DC 4–20mA, DC 0–10V, DC 1–5V
Intelligent Type	Input & Output signal: DC 4–20mA, DC 0–10V, DC 1–5V
Field Operation	The field, remote control switch regulation and MODBUS, PROFIBUS field bus
Voltage optional	AC 110–240V; 380V 50/60Hz; DC12V; DC24V; Special voltage can be customized
Protection Class	IP65

Feature	Spec / Benefit
Housing	Hard aluminum alloy, hard anodized + polyester powder coating (corrosion resistant)
Protection	IP65 (higher available on request)
Motor	Fully enclosed cage motor; Insulation class F (overheat protection)
Manual Override	Manual operation available during power-off
Limit Switch	Mechanical + electronic limit; adjustable stop screws; cam-controlled electronic limit
Self-locking	Worm-gear self-lock; prevents reverse rotation
Noise	Max. 50 dB
Mounting Interface	ISO 5211 / DIN 3337
Installation	Vertical or horizontal mounting
Wiring	Single-phase or three-phase wiring supported

Performance\Item		5	10	16	30	60	125	250	400
Angle of Rotation		0-90°
AC220V AV Voltage	Torque Output	50Nm	100Nm	160Nm	300Nm	600Nm	1250Nm	2500Nm	4000Nm
	90°Cycle Time	10S/20S/60S	15S/30S/60S			30S/60S	90S
	Working Current	0.23A	0.35A	0.40A	0.45A	0.60A	1.03A	1.85A	2.70A
	Drive Motor	50W	75W	80W	100W	130W	210W	285W	360W
	Voltage Options	AC220V / AC110V / AC24V
	Control Circuit	B: ON/OFFType with Passive Contact Signal Feedback
DC DC Voltage	Torque Output	60Nm	100Nm	170Nm	330Nm	680Nm	1300Nm	2500Nm
	90°Cycle Time	8S	11S		9S	35S	32S
	Starting Current	0.74A	1.40A	1.40A	3.80A	7.0A	3.8A	4.3A
	Working Current	0.38A	0.38A	0.40A	1.03A	0.70A	1.2A	1.4A
	Drive Motor	9.5W	9.0W	9.6W	30W	33W	30W	33W
	Voltage Options	DC12V / DC24V / DC110V / DC220V
	Control Circuit	F: DC24V/ DC12V Direct ON/OFF Type
AC380V	Torque Output	70Nm	100Nm	200Nm	300Nm	600Nm	1300Nm	2500Nm
	90° Cycle Time	20S	27S	27S	25S	26S	50S	50S
	Starting Current	0.20A	0.28A	0.30A	0.55A	0.45A	0.60A	0.77A
	Working Current	0.16A	0.25A	0.27A	0.53A	0.43A	0.65A	0.75A
	Drive Motor	51W	70W	77W	117W	220W	90W	103W
	Voltage Options	AC380V
	Control Circuit	G: AC380V Three-Phase Power Supply with Passive Signal Feedback (Default) H: AC380V Three-Phase Power Supply with Resistance Potentiometer Signal Feedback (Optional)
Protection Class		IP65
Ambient Temp		-30°C~+60°C
Installation Angle		Any
Electrical Connection		G1/2 Water-proof Cable Connectors, Electric Power Wire, Signal Wire

Note: Can’t connect one actuator parallel with other ones, in other words,can’t use the same controller contact points tocontrol two and above actuators, otherwise it will cause out-of-control, motor overheating, product damage, andshorter service life.

Industry Applications

Oil & Gas

Electric actuators enable reliable remote shutoff and precise positioning for pipeline and process valves. Optional on/off or modulating control with feedback signals.
Chemical & Petrochemical

Stable electric actuation for corrosive-duty applications. Supports modulating control and position feedback to match PLC/DCS requirements.
Power Generation

Designed for power plants where dependable actuation and accurate positioning are required on steam/water auxiliary lines and balance-of-plant systems.
Food & Pharmaceutical

Electric actuation for sanitary valve automation. Clean operation with configurable control and feedback—confirm enclosure and material requirements by application.
Water & Wastewater

Ideal for treatment plants and pump stations—remote on/off or modulating control, position indication/feedback, and continuous field operation.
HVAC & District Heating

Accurate valve actuation for energy-efficient HVAC networks. Smooth flow regulation with modulating control options.