Limit Switch Box (Valve Position Monitor)
The Limit Switch Box is a critical accessory used in automated valve systems to provide accurate visual and electrical feedback on valve position. It is widely installed on pneumatic and electric actuators to indicate whether the valve is in the open or closed position, ensuring safe and reliable operation in industrial processes.
UNOX Limit Switch Boxes are designed for demanding industrial environments and offer high durability, precise switching, and long service life. The unit is typically mounted directly onto the actuator via a NAMUR standard interface, allowing quick installation without additional brackets. Inside the enclosure, precision micro switches or proximity sensors detect actuator movement and transmit position signals to control systems such as PLC, DCS, or SCADA.
The robust housing, usually manufactured from die-cast aluminum or engineered polymer, provides excellent resistance against dust, moisture, vibration, and corrosion. High ingress protection ratings (IP65/IP67 depending on model) make the product suitable for outdoor installations and harsh environments such as chemical plants, power stations, water treatment facilities, oil & gas systems, and industrial steam lines.
A clear visual position indicator on the top cover allows operators to instantly verify valve status from a distance, reducing inspection time and improving operational safety. Internal adjustable cams enable precise calibration, ensuring accurate switching points even after long-term use.
UNOX Limit Switch Boxes are compatible with most quarter-turn valves including ball valves, butterfly valves, and plug valves. Multiple switch configurations, voltage options, and optional explosion-proof versions are available upon request to meet different application requirements.
With reliable performance, easy installation, and full compatibility with international standards, UNOX Limit Switch Boxes provide a dependable solution for valve position monitoring in automated flow control systems.
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