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TopWorx Limit Switch Box TVA-ASWGNVM1A11 Valve Monitor
TopWorx Limit Switch Box TVA-ASWGNVM1A11 Valve Monitor
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The TopWorx TVA-ASWGNVM1A11 is part of the TVA series — a modular valve-position monitoring solution engineered for general industrial (safe-area) installations. Built with a high-impact composite resin enclosure, this model is designed to deliver dependable visual indication and network/bus-sensor feedback for actuated quarter-turn valves.
Key Features
Composite resin housing (TVA series) — lightweight, corrosion-resistant and cost-effective for general industrial usage.
AS-Interface bus with 2 SPDT GO™ switches — provides networked electrical feedback of valve open/closed status.
High-visibility 90° visual indicator — colour coded Green for OPEN and Red for CLOSED.
NAMUR stainless steel shaft interface — enables direct mounting to actuators that support NAMUR mounting interface.
Wiring entry variant “V” — flexible for installations where metric or alternate wiring entry is needed.
Silicone O-ring sealing — enhances durability and sealing performance under ambient conditions.
Safe-Area classification (no hazardous approvals) — simplifies procurement when explosion-proof certification is not required.
Modular design — part of the TVA family, meaning you can configure bus/sensor, display, shaft, wiring/conduit options to match installation needs.
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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.