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A fusible plug is a threaded cylinder of metal, usually bronze, brass or gunmetal, with a tapered hole drilled completely through its length. This hole is sealed with a metal of low melting point that flows away if a predetermined high temperature is reached.
Medical gas cylinders in the UK and some other countries have a fusible plug of Wood's metal in the valve block between the valve seat and the cylinder. [ citation needed ] This plug melts at a comparatively low temperature (70 °C) and allows the contents of the cylinder to escape to the surroundings before the cylinder is significantly ...
The fusible plugs, usually located in the highest part of the crown sheet, have a soft metal alloy core which melts out if the water level in the boiler gets too low. Steam and water blowing into the firebox both alerts the locomotive crew to the low water condition and helps put out the fire. Not all locomotives are equipped with fusible plugs.
Washout plug A small mudhole used for washing out the boiler. Plugs, as compared to mudholes, are usually screwed into a taper thread, rather than held by clamps. Water drum see mud drum Water-tube boiler a boiler whose primary heating surface is composed of many small tubes, filled with water.
Swagelok Company is a $2 billion privately held developer of fluid system products, assemblies, and services for the oil and gas, chemical and petrochemical, [2] ...
Fusible plugs over the firebox melt at a temperature lower than that of the firebox plates, thereby warning the operators by the noisy escape of steam if the water level is too low to cool the firebox crown safely. Stays, or ties, physically link the firebox and boiler casing, preventing them from warping.
An electrical fusible link is a type of electrical fuse that is constructed simply with a short piece of wire typically four American wire gauge (AWG) sizes smaller than the wire that is being protected. For example, an AWG 16 fusible link might be used to protect AWG 12 wiring.
Glass cartridge and plug fuses allow direct inspection of the fusible element. Other fuses have other indication methods including: Indicating pin or striker pin — extends out of the fuse cap when the element is blown. Indicating disc — a coloured disc (flush mounted in the end cap of the fuse) falls out when the element is blown.