Subject to Lead Time - Contact for more information
TopWorx Limit Switch Box TVA-00WGNAM Valve Monitor
TopWorx Limit Switch Box TVA-00WGNAM Valve Monitor
Couldn't load pickup availability
The TopWorx TVA-00WGNAM Limit Switch Box is an entry-level, high-value valve position monitor designed for general purpose and non-incendive applications. Built around the compact TVA series enclosure from TopWorx, it features a resin/high-impact housing and visible display of valve position (Green = OPEN / Red = CLOSED). The model code “00WGNAM” indicates no additional mechanical switches (“00”), visual display “G”, conduit entries “W”, bus/sensor type “N” (typically standard), and approvals “AM” (intrinsically safe/area classification 0) as per the TVA series coding structure.
This switch box is a smart choice where space, cost and simplicity matter, yet reliable valve status indication is required, such as in water-treatment, HVAC, chemical, general industrial or process plant environments. It enables direct-mount to quarter-turn actuators for visual and electrical feedback of valve open/close position.
Key Features
Compact and economical design — Part of the TVA range, which is described as “ideal for non-incendive applications … modular in design, offers cost savings.”
High-impact resin enclosure — Lightweight yet robust, suitable for general purpose installations.
Clear visual indicator — Standard 90° display with Green = OPEN, Red = CLOSED (“G” code) for fast site recognition of valve status.
Bus/Sensor flexibility — The TVA series supports a variety of sensor/bus modules; “N” in the model may indicate a standard configuration.
Approval / area classification “AM” — Suitable for intrinsically safe (Zone 0) installations when configured accordingly.
Direct-mount capability — Designed for mounting on quarter-turn actuators (ball, butterfly, plug) providing both mechanical and electrical feedback.
Cost-effective — A lower-cost option compared to more rugged/industrial variants, ideal for less demanding environments.
Share
Enquire Online!
FAQ's
What is the difference between a valve and an actuator?
What types of actuators are available?
The main types of actuators are:
Pneumatic actuators – use compressed air for fast, reliable operation.
Electric actuators – use electrical power for precise control.
Hydraulic actuators – use fluid pressure for high-torque applications.
Each type offers unique advantages depending on the environment, media, and system control needs.
How do I choose the right actuator for my valve?
To select the correct actuator, consider:
Valve type and torque requirement
Power source available (air, electric, or hydraulic)
Operating environment (temperature, humidity, hazardous area)
Control signal type (on/off or modulating)
Matching actuator torque and compatibility with the valve’s ISO mounting ensures reliable performance.
What are the main types of valves used in automation?
The most common valves in automated systems include:
Ball valves – for tight shutoff and quick operation.
Butterfly valves – for larger flow control with compact design.
Globe valves – for precise throttling and flow regulation.
Check valves – to prevent backflow.
Gate valves – for full bore flow isolation.
What’s the difference between a double-acting and spring-return actuator?
Double-acting actuators use air (or power) to both open and close the valve.
Spring-return actuators use air to open (or close) the valve, and a built-in spring to automatically return it to a safe position when power or air is lost — ideal for fail-safe operation.
How often should valves and actuators be serviced?
Regular maintenance intervals depend on operating conditions, but a good rule of thumb is to inspect every 6–12 months.
This includes checking for leaks, lubrication, seal wear, and actuator responsiveness to prevent unexpected downtime.