4M & 3M Series NAMUR Solenoid Valves

Features & Key Specifications

Features & Key Specifications of Our NAMUR Valve Series:

Direct NAMUR Mounting Standard:
Engineered to comply with the VDI/VDE 3845 (NAMUR) standard interface, this allows the valve to be bolted directly onto any standard pneumatic actuator, significantly reducing installation time.

Dual Series for All Actuator Types:

4M Series (5/2 Way): The standard choice for controlling double-acting actuators, providing two output ports to control both the open and close strokes.

3M Series (3/2 Way): Purpose-built for single-acting (spring-return) actuators, providing the necessary pressure/exhaust function for fail-safe applications.

Rapid & High-Frequency Performance:
With a swift activation time of just 0.05 seconds and a maximum frequency of 5 Hz, these valves are ideal for applications requiring fast process valve actuation.

Global Electrical & Thread Compatibility:
We offer a complete range of coil voltages (e.g., 24V DC, 110V AC) with standard DIN connectors. To meet global requirements, NPT, BSPP (G), and BSPT (P) thread types are available.

Robust & Weatherproof Construction:
Designed for tough industrial environments, these valves feature a durable anodized aluminum body and an IP65 rated coil assembly with Class F insulation, protecting them from dust and water ingress.

Application Fields

The Standard Choice for Process Automation:

Water & Wastewater Treatment: Automating large butterfly and ball valves in water distribution and treatment plants.

Chemical & Petrochemical Industry: Controlling process flow of various compatible chemicals.

Food & Beverage: For "clean utility" lines (e.g., plant steam, compressed air, water) when paired with process actuators.

Power Generation: Controlling cooling water circuits and fuel systems.

General Industrial: Any application where automated quarter-turn (90-degree) valve operation is required.

Technical & Selection Guide

Understanding NAMUR Valve Selection

What is a NAMUR Valve?
A NAMUR valve is a solenoid valve whose key feature is its mounting interface. Instead of being connected with hoses and fittings, it is designed to be bolted directly onto the side of a pneumatic actuator.

Choosing Between 5/2 Way (4M) and 3/2 Way (3M):

Use a 4M (5/2 Way) Valve for a DOUBLE-ACTING Actuator. A double-acting actuator requires air pressure to both open AND close the process valve.

Use a 3M (3/2 Way) Valve for a SINGLE-ACTING (Spring-Return) Actuator. A single-acting actuator uses air pressure for one direction and an internal spring to return to its fail-safe position.

FAQ

Frequently Asked Questions

Q: What is the main difference between a NAMUR valve and a standard 4V series valve?
A: The primary difference is the mounting method. A 4V series valve is an "inline" valve that connects to an actuator via tubes and fittings. A NAMUR valve is a "direct mount" valve that bolts straight onto the actuator body.

Q: What kind of valve does this NAMUR valve control?
A: This solenoid valve is used to pilot a pneumatic actuator, which in turn is used to automate larger process valves, most commonly ball valves and butterfly valves.

Q: Do I need to order mounting screws separately?
A: No, our NAMUR valves typically ship complete with the necessary mounting screws and seals to attach them to the actuator, ensuring you have everything needed for a quick installation.