Festo NVF3-MOH-5/2-K-1/4-EX Air Solenoid Valve (Part No. 535987)
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Festo NVF3-MOH-5/2-K-1/4-EX Air Solenoid Valve (Part No. 535987)
The Festo NVF3-MOH-5/2-K-1/4-EX is a specialized and robust air solenoid valve from the NVF3 series, primarily designed for use in environments where there is a risk of explosion. The key distinguishing feature of this valve is its compliance with the EU ATEX Directive (II 2G and II 2D), making it suitable for pneumatic control in hazardous areas, specifically Zone 1 (Gas) and Zone 21 (Dust).
This valve has a versatile function, operating as a 5/2-way or 3/2-way monostable valve. Being monostable means it is actuated by a single solenoid and uses a mechanical return spring to revert to its home position when the electrical signal is removed, ensuring a reliable, defined starting state.
A critical design feature is the NAMUR port pattern connection, conforming to the VDI/VDE 3845 standard. This interface allows the valve to be directly mounted onto pneumatic actuators such as quarter-turn valves and rotary actuators, simplifying installation and reducing piping complexity.
The valve offers a significant standard nominal flow rate of approximately 900 liters per minute and operates within a pressure range of 2 to 10 bar. It is constructed with a durable die-cast aluminium housing and utilizes a poppet seat design with soft sealing for reliable switching. The valve is pilot-actuated and includes both detenting and non-detenting manual override options.
In summary, the NVF3-MOH-5/2-K-1/4-EX is an essential component for safety-critical pneumatic control in the process industries, offering a high-flow, NAMUR-compliant, and explosion-protected solution.
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