Feature

Pilot valves for harsh environments

Festo has introduced a robust pilot valve – the VOFD – for harsh environment process automation applications.

06/12/2015 09:49:08

The valve is suitable for the actuation of butterfly valves, cylinders, diaphragm drives and rotary drives, and can be used for emergency shut-down functions up to Safety Integrity Level 4 (SIL 4), compliant with IEC 61508.

VOFD pilot valves feature a titanium dioxide plated surface providing good abrasion and chemical resistance. They are available with several Ex-protection methods to best serve the needs of each application, ptroviding ATEX protection for zone 1/21 (gas and dust).

An exhaust protector ensures that no atmosphere or environmental contaminants can enter the valve and degrade it. Internal and external pilot air functions have been integrated in a single valve, enabling it to be converted simply by turning a screw, depending on the function required.

The valve has two connection options: a NAMUR-port for direct installation on an actuator as well as G and NPT threads for in line connection. The NAMUR interface valves are exceptionally quick and easy to install, as no tubing is required.

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.