IECEx CU – Valve Control Units for Zone 1 and Zone 2

Product Type(s) : Control Units
Description :

IECEx valve control units are certified for ATEX and IECEx Zone 1 and 2 environments and ensure safe, compliant, and precise control in hazardous zones.  Available in Direct Connect 24V DC.



The IECEx CU is a control unit that allows users to safely, efficiently, and reliably process their products in hazardous IECEX zone 1 applications †. These innovative control units can be used on most pneumatically-operated SPX FLOW sanitary valve which are rated for zone 1 applications.  This range of control units is available in Direct Connect 24V  DC.

† Suitable for gas applications: ex ia*** / Ex ia IIC T4 Gb


  • Ensures safety, efficiency, clarity, and reliability at a competitive price
  • Features high-precision position sensors with simple adjustment
  • Equipped with manual override solenoids for added control and flexibility
  • Designed to meet stringent requirements for hazardous environments
Theory of Operation

The IECEx CU ex ia control unit is designed for managing process valves in explosive atmospheres in food and beverage, chemicals, personal care, pharmaceuticals industries and other related sectors.​

This control unit acts as an interface between the process control systems and the process valves, handling both electrical and pneumatic signals.  Using built-in or external sensors it monitors the positions of the valves, namely their "open" and "closed" positions.

Intrinsically safe solenoid valves are connected to the Programmable Logic Controller (PLC) through isolation amplifiers. Similarly, signals from the intrinsically safe valve position indicators are sent to the PLC via these isolation amplifiers. Solenoid valves are responsible for the pneumatic control of our APV valves.​

The control unit manages the valve positions, both open and closed, using either integrated or external sensors. The IECEx CU ex ia control unit is certified as intrinsically safe according to the current standards IEC 60079-0 and IEC 60079-11.  Our control units are approved for use as a Category 2 device for gas-related applications.​


The Significance of IECEx and ATEX Compliance ​

When dealing with hazardous environments, it's crucial to use control units that adhere to the ATEX (Atmosphères Explosibles) and IECEx (International Electrotechnical Commission System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres) standards.​

ATEX and ​IECEx are global standards governing equipment that are used in potentially explosive atmospheres where flammable gases, vapors, mists, or combustible dusts may be present.​  These standards must be adhered to as they outline the requirements for the design, construction, testing, and certification of equipment, including control units.

Our APV IECEx CU Valve Control Units for ATEX and IECEx Zones 1 and 2 ensure secure and accurate control of pneumatically-operated sanitary valves. These control units are built to function safely in hazardous settings with potentially explosive atmospheres. They employ advanced position sensors and manual override solenoids to ensure precise valve positioning and flexibility.

ATEX and IECEx control units for Zones 1 and 2 are available with a Direct Connect 24V DC.