EX4-I21 Emerson Electrical Control Valve

Emerson EX4-I21 Electrical Control Valve Overview

Features:

• Multifunction
• Fully Hermetic Design (No Thread Joints Between Valve Body and Motor Compartment)
• Applicable to All Common Refrigerants (HCFC, HFC) and For Subcritical CO2 Applications

The Emerson EX4-I21 Electrical Control Valve may still be available for purchase and support from Artisan Technology Group beyond End-Of-Life (EOL) by the manufacturer (OEM).

Electrical Control Valve Price & Specs

Emerson EX4-I21 Electrical Control Valve Description

Functions

Provides proportional electro-pneumatic control of valve position using 4-20mA input signal to regulate process fluid flow. Integrates I/P converter, pneumatic positioner, and feedback mechanism for precise valve stem positioning. Operates on 20-100 kPa pneumatic supply, delivering modulated output pressure to valve actuator. Features HART communication protocol for remote configuration, diagnostics, and position feedback. Incorporates explosion-proof housing suitable for hazardous area installations. Interfaces with DCS/PLC systems via analog signals and digital communication. Enables automated flow control in oil/gas processing, chemical plants, and industrial process applications requiring precise throttling control.

Platforms

Programmable digital valve controller providing flow control functionality for pneumatically actuated linear or rotary valve assemblies. Interfaces with automation systems via Hart, Foundation Fieldbus, or Profibus protocols. Features include position feedback, diagnostic capabilities, temperature/pressure monitoring, step response, travel deviation alerts, and partial stroke testing. Operates in hazardous environments with explosion-proof certifications. Designed for implementation in hydrocarbon processing, power generation, chemical manufacturing, pulp/paper production, food/beverage processing, and pharmaceutical manufacturing where precise flow regulation is critical for process control.

Applications

Industrial process flow control in systems handling steam, water, air, and other fluids, integrating within automated plant control platforms via pneumatic or electric actuators; interfaces with digital positioners and input/output modules for precise modulation; commonly applied in chemical processing, power generation, and HVAC systems for pressure, temperature, and flow regulation.

Accessories

Requires separate cable and connector assembly for the M12 electrical plug interface; connects to refrigeration system tubing via 3/8” (inlet) and 5/8” (outlet) ODF stainless steel connections; no integrated mainframe or backplane; designed for direct stepper motor electrical control with precision flow modulation; no additional solenoid valve needed due to positive shut-off function; requires matching power and control interface compatible with M12 plug connection.

Interfaces

4-pin M12 male connector, A-coded, provides power (24VDC) and Pulse Width Modulation (PWM) control signals from an external electronic driver to operate the stepper motor for flow regulation. Requires compatible 4-pin M12 female cable assembly.

Specifications

Specifically designed for refrigeration and air conditioning systems, this electronic expansion valve regulates refrigerant flow. It features a stepper motor actuation mechanism and is compatible with both DX and flooded systems. The valve interfaces with dedicated controllers via Modbus RTU communication protocol. Constructed for integration into HVAC systems, it offers high precision control, energy efficiency, and robust response to varying load conditions. Commonly found in commercial and industrial cooling applications, it supports easy field service with straightforward diagnostics.

This section includes content generated with the assistance of artificial intelligence (AI) tools. AI is used to increase efficiency and provide timely information. Please note that the content may not have been reviewed for accuracy or completeness. Use this information at your own discretion, and verify details independently as needed.

Emerson EX4-I21 Electrical Control Valve Manuals, Datasheets, Drivers, Links

• Emerson EX4 / EX5 / EX6 / EX7 / EX8 Series Datasheet (pdf)
• View all Emerson products

Emerson EX4-I21 Electrical Control Valve Specs

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