TopWorx TXP-M21GNEM Valve Position Limit Switch Box

Product Description

The TopWorx TXP-M21GNEM is a compact direct-mount valve position switch box from Emerson TXP series, constructed with cast aluminum housing. It is an explosion-proof valve feedback monitor designed for rotary pneumatic actuators, equipped with GO proximity sensors and clear visual open/closed status indicator. It holds ATEX, IECEx and UL hazardous area certifications, with IP66/67 high ingress protection. This unit is widely used for on-off valve position feedback in process plants and is supplied as new surplus or fully tested refurbished spare parts for oil & gas, petrochemical and chemical plant retrofit and maintenance.

Product Functions

• Detect rotary valve open and closed positions and send discrete feedback signals to DCS/PLC
• High visibility local visual indicator for on-site valve status checking
• Built-in non-contact GO proximity switches for long service life with no mechanical contact wear
• Explosion-proof enclosure suitable for Zone 0/1/2 hazardous explosive environments
• Direct mount design, easy to install on standard valve actuators without extra brackets
• Support flexible cam adjustment for quick calibration of valve trip points

Application Scenarios

• Oil & gas pipeline, offshore platform and compressor station emergency shutdown valves
• Petrochemical and refinery furnace, isolation and blowdown on-off valve monitoring
• Chemical plant flammable medium pipeline valve safety interlock systems
• Power plant fuel gas and auxiliary process valve position feedback loops
• Spare replacement and repair of existing TopWorx TXP series valve position monitoring assemblies

FAQ