Valves UK
Bronze Flow Indicator Sight Glass – Hardened Glass Window – Moplen Ball
Bronze Flow Indicator Sight Glass – Hardened Glass Window – Moplen Ball
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The Bronze Flow Indicator Sight Glass with a single hardened glass window and Moplen (polypropylene) ball offers durable and reliable visual flow monitoring for a wide range of fluid systems. As media flows through the valve, the highly visible Moplen ball moves freely, providing a simple yet effective indication of active flow.
Built with a corrosion-resistant bronze body and a toughened glass viewing window, this unit is suitable for higher temperatures and pressures than standard plastic domes. The Moplen ball adds chemical resistance, making this flow indicator ideal for use in water, light chemical, and general industrial applications.
Key Features:
- Hardened glass single window for durable flow visibility
- Moplen ball for clear movement and chemical resistance
- Bronze body for excellent corrosion and thermal resistance
- Reliable visual flow confirmation for pressurised lines
- Suitable for water, oils, light chemicals, and non-aggressive fluids
- Ideal for process monitoring in industrial and marine systems
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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.