Fusible links perform the same basic function as fuses but they go about it in a slightly different way. The body has a hexagonal flange to tighten it into the shell.
Mountings And Accessories Of A Boiler Thermodynamics
Fusible plug diagram. The third plug c is made up of copper is locked with metal like tin or lead which has a low melting point. There could be several cases because of which the metal sealant may become oxidized and this might result in increasing its melting point. Collection of john deere wiring diagram download. In automotive applications a fusible link is a length of wire that is several gauges thinner than the wire that it is designed to protect. It is a threaded metallic cylindrical object with a tapered hole in it which goes through its entire length. Steam stop valve diagram.
A wiring diagram is a streamlined standard pictorial depiction of an electric circuit. In normal working conditions water covers the fusible plug remains cool. It is fitted on the fire box crown plate or over the combustion chamber at its approprirate place. That is the reason the reliability of this device is always put to test as a last resort. Fusible plug is a fitting used in steam boilers to enhance the safety during operation. A common form of fusible plug is illustrated in fig.
It shows the elements of the circuit as simplified shapes and also the power as well as signal links in between the gadgets. You will learn. Diagram of fusible plug. Fusible plug corrosion resistant construction and available in brass or stainless steel underwriters laboratories listed and approved as fusible plugs refrigerant globe recommends where fusible plugs are installed in an atmosphere which can cause stressstrains or corrosion of surfaces the plugs be examined annually and replaced if evidence. In this video we look at the fusible plug its construction how it works and why we use them. Its working depends upon the water level in the boiler shell.
Diagram of fusible plug. Working of fusible plug. When all goes well this results in the fusible link failing and breaking the circuit before the. The video focuses on fusible plugs used in compressed air and steam boiler systems. In case the water level falls below the danger levels the fusible plug gets exposed to steam. The working of a fusible plug is not 100 foolproof.
A gun metal plug. And if any such thing happens the plug would fail to respond. Blow off valve or blow down valve. A fusible plug is a threaded metal cylinder usually of bronze brass or gunmetal with a tapered hole drilled completely through its lengththis hole is sealed with a metal of low melting point that flows away if a pre determined high temperature is reached. The function of a steam stop valve this is called main stop valve is to control the flow of steam from within the boiler and to stop it completely when required. The initial use of the fusible plug was as a safety precaution against low water levels in steam engine boilers but later applications.
It is usually of brass bronze or even gunmetal. It consists of a hollow gun metal body screwed into the fire box crown.
Gallery of Fusible Plug Diagram
