METSO D100308 Solenoid Pilot Valve / Integrated Manifold Card

The Metso (now Neles / Valmet) D100308 is a critical internal component, specifically a Solenoid Pilot Valve / Terminal Assembly, typically utilized within the Neles D-series (DXP/DXR) or EasyLink valve monitoring systems. 

It is an essential part of the pneumatic control chain for automated rotary valves.

1. Product Description

The D100308 is a specialized module designed for integration into Neles limit switch boxes and positioners. Its primary function is to act as the interface between the electrical control signal (from a PLC/DCS) and the pneumatic actuator.

When energized, this pilot assembly redirects air pressure to the actuator to open or close the valve.

 It is known for its compact, modular design, which allows it to be housed safely inside an explosion-proof or corrosion-resistant enclosure alongside position switches.

2. Technical Parameters

3. Product Advantages & Features

Integrated Design: By housing the solenoid inside the switch box, it eliminates external wiring and pneumatic tubing between the switch and the solenoid, reducing failure points.

Low Power Consumption: Engineered for modern DCS systems, allowing multiple units to be powered from a single I/O card.

EasyLink Compatibility: Features a "Plug-and-Play" interface that allows for rapid replacement in the field without disturbing the main pneumatic piping.

Hazardous Area Ready: When installed in a DXP or DXR housing, it inherits the enclosure's ATEX, IECEx, and CSA certifications for use in Zone 1/Division 1 environments.

Environmental Protection: Internal mounting protects the delicate solenoid coil from salt spray, chemicals, and physical impact.

4. Application Cases

Emergency Shutdown (ESD): Used in oil and gas upstream facilities where a valve must close reliably upon signal loss.

Batch Processing: Frequent cycling in chemical and pharmaceutical plants where high-speed valve actuation is required.

Corrosive Environments: Offshore platforms and paper mills where external solenoids would corrode; the D100308 stays protected inside the Neles housing.

Automated Isolation: Providing remote control for large-scale butterfly or ball valves in water treatment and mining.

5. Related & Other Models in the Series

The D100308 belongs to the modular ecosystem of Neles automation. Related parts and series include:

D100307 / D100309: Similar assemblies with different voltage ratings or internal orifice sizes.

DXP Series: The "Flameproof" aluminum housing that typically contains the D100308.

DXR Series: The "Composite" corrosion-resistant housing for chemical applications.

EPX Series: The Neles intrinsically safe (IS) version of the pilot assembly.

B1-Series Actuators: The primary pneumatic hardware that this pilot valve is designed to control.