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TopWorx Limit Switch Box TVA-ASWGNXM1A11 Valve Monitor
TopWorx Limit Switch Box TVA-ASWGNXM1A11 Valve Monitor
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The TopWorx TVA-ASWGNVM1A8 is a modular valve-position monitor from the TVA series, designed for safe-area industrial applications. Encased in a composite resin housing, it offers both visual indication and electronic feedback for quarter-turn actuated valves.
Key Features
Composite resin enclosure from the TVA series: lightweight, corrosion-resistant, cost effective for safe-area use.
AS-Interface bus network with two SPDT GO™ switches: enables electronic remote valve status feedback.
High-visibility 90° visual indicator: green for open, red for closed—quick on-site status.
NAMUR stainless-steel shaft interface: simplifies mounting to compatible actuator drive systems.
Modular design: part of the TVA series, offering a wide set of configuration possibilities (bus/sensor, display, entry variants) for flexibility. Emerson+1
Safe-area classification: ideal where hazardous-area certification is not needed, thus lowering cost and complexity.
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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.