Description

Fusible plugs, occasionally also called fuse plugs, solder plugs, are thermally operated non-reclosing pressure relief devices which function by yielding or melting of the fusible alloys sintered in the plug body.

A Fusible plug is a type of warning device which operates as a safety valve when dangerous temperatures, rather than dangerous pressures, are reached in a closed vessel (Air compressor, Boiler).

Fusible plugs are a type of warning device employed on compressed air systems, well heads and steam systems. They are considered a last line of defense and are often used to avert a catastrophic failure occurring e.g., explosion. Whist safety valves protect machinery items from over pressure, fusible plugs protect machinery items from over temperature.

Fusible plugs have found widespread application in many industries due to their simple design, effectiveness, and improvements to safety. They are commonly installed within compressed air systems and coal fired boilers and steams systems, wellheads, etc. They are considered as a last line of defense and often are used to avert a catastrophic failure occurring, for example, an explosion.

Construction of fusible plugs

A fusible plug is a threaded metallic cylindrical object usually made up of bronze, brass, or gunmetal, with a tapered hole drilled completely through its length. This hole is sealed with a low melting point metal that flows away if a predetermined high temperature is reached.

How Fusible Plugs Work

The fusible alloy within a fusible plug is designed to melt at a lower temperature than the surrounding plug body. If the plug is exposed to elevated temperatures, the fusible alloy will melt, and a straight or tapered channel will be formed lengthwise through the plug body. The open channel allows the system pressure to vent directly to a predetermined location. For compressed air systems, this location is usually just the space surrounding the plug. For boilers, it is more likely to be the furnace or firebox. The fusible plug body is often shaped so that a whistling noise is created as the system pressure vents, this acts as a local audible alarm to system operators.

Therefore, one of the most important safety measures to prevent any accident in the working of mechanical appliances is what is known as the fusible plug. The working of machines always comes with the risk of incident. So, what the manufacturers do is, include certain devices in these machines which could ensure their safety and lessen the risk of any kind of disaster. One such machine is the steam engine, whose working involves tremendously high temperatures in a closed vessel.

Fusible plugs only respond to over-temperature. Compared to other type of safety devices, they are simpler and require no maintenance. AWRING MAAD SANAT has been in this market for 5+ years. We treat quality above anything else. This is not only what we say, but also what we do, in many aspects that you might not be aware of. We have the test facility in house, which makes every single product we deliver is qualified.

Technical specifications:

Barcode AMS-FUP-100	QrCode AMS-FUP-100