Skip to main content
Simplifying Complexity. Delivering Safety.
Simplifying Complexity.
Delivering Safety.

Intrinsically Safe Friction Free Digital Valves (FFD)

IECEx & ATEX zone 0 high performance intrinsically safe control system valves


  • IS certified for Zone 0
  • Very low power
  • Fast acting, frictionless
  • Multiple port configurations

Configure your product

Use our product configurator tool to build a system to your exact specification.


Got a question?

For more information contact your local partner to speak to one of our purge and pressurization experts or contact us.

  • Description
  • Specifications
  • Downloads
  • Manuals


Expo’s Friction Free Digital Valves (FFD) offer exceptionally low power operation with reliability in a wide range of control system applications. From intermittent use to non-stop cycling, the FFD is fast acting, wear-free, non-sticking and frictionless during operation.

Designed for very long service life, FFDs use modular construction to simplify maintenance and reduce replacement time. A wide range of porting and switching options is available.

The FFD is a direct replacement for Expo's legacy FFV range. Contact Expo with your FFV specification. 


Material of construction
Port block: Aluminium, brass or stainless steel
Seals: ECO or Viton
Pneumatic functions
2 port, 2 position, NC or NO
3 port, 2 position, NC
4 port, 2 position.
Port sizes
¼” & 3/8” BSP & NPT
Control voltage
12VDC or 24VDC
Temperature class
T5/T6 depending on configuration
Ambient temperature
Depends on configuration voltage and T class selected – see data sheet