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Valves UK

Koei Nucom Electric Modulating Actuators – 4-20mA

Koei Nucom Electric Modulating Actuators – 4-20mA

£2,764.92 GBP
£2,764.92 GBP
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The Koei Nucom Electric Modulating Actuators deliver high-quality performance for precise valve positioning and flow regulation in industrial automation systems. Designed for 4-20mA proportional control, these actuators ensure smooth, accurate modulation for applications requiring tight process control. Built in Japan to the highest standards, the Nucom series combines robust engineering, long service life, and dependable performance in both safe and demanding environments.

Featuring a compact design, low power consumption, and quiet operation, the Koei Nucom Modulating Actuators are ideal for industries such as chemical processing, water treatment, HVAC, and energy systems. With durable housing, corrosion-resistant components, and reliable feedback functionality, they provide consistent accuracy even under challenging conditions.

Key Features:

4-20mA proportional modulating control for precise flow adjustment

Durable, high-quality Japanese construction

Compact and efficient design for easy integration

Low noise and low power consumption

Available in various torque ranges for different valve types

Long-life drive system for smooth, accurate operation

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FAQ's

What is the difference between a valve and an actuator?

A valve controls the flow of a fluid (such as water, gas, or steam), while an actuator is the device that operates the valve — automatically opening, closing, or positioning it. Actuators can be electric, pneumatic, or hydraulic, depending on the application and control requirements.

What types of actuators are available?

The main types of actuators are:

Pneumatic actuators – use compressed air for fast, reliable operation.

Electric actuators – use electrical power for precise control.

Hydraulic actuators – use fluid pressure for high-torque applications.

Each type offers unique advantages depending on the environment, media, and system control needs.

How do I choose the right actuator for my valve?

To select the correct actuator, consider:

Valve type and torque requirement

Power source available (air, electric, or hydraulic)

Operating environment (temperature, humidity, hazardous area)

Control signal type (on/off or modulating)

Matching actuator torque and compatibility with the valve’s ISO mounting ensures reliable performance.

What are the main types of valves used in automation?

The most common valves in automated systems include:

Ball valves – for tight shutoff and quick operation.

Butterfly valves – for larger flow control with compact design.

Globe valves – for precise throttling and flow regulation.

Check valves – to prevent backflow.

Gate valves – for full bore flow isolation.

What’s the difference between a double-acting and spring-return actuator?

Double-acting actuators use air (or power) to both open and close the valve.


Spring-return actuators use air to open (or close) the valve, and a built-in spring to automatically return it to a safe position when power or air is lost — ideal for fail-safe operation.

How often should valves and actuators be serviced?

Regular maintenance intervals depend on operating conditions, but a good rule of thumb is to inspect every 6–12 months.

This includes checking for leaks, lubrication, seal wear, and actuator responsiveness to prevent unexpected downtime.