Its working depends upon the water level in the boiler shell. A common form of fusible plug is illustrated in fig.
Rieth Fusible Plugs Your Valve Pipe And Fitting Solution
Fusible plug diagram. In this video we look at the fusible plug its construction how it works and why we use them. It is a threaded metallic cylindrical object with a tapered hole in it which goes through its entire length. There could be several cases because of which the metal sealant may become oxidized and this might result in increasing its melting point. That is the reason the reliability of this device is always put to test as a last resort. In normal working conditions water covers the fusible plug remains cool. Collection of john deere wiring diagram download.
Blow off valve or blow down valve. When all goes well this results in the fusible link failing and breaking the circuit before the. The third plug c is made up of copper is locked with metal like tin or lead which has a low melting point. It is fitted on the fire box crown plate or over the combustion chamber at its approprirate place. A wiring diagram is a streamlined standard pictorial depiction of an electric circuit. It is usually of brass bronze or even gunmetal.
You will learn. Working of fusible plug. Fusible plug is a fitting used in steam boilers to enhance the safety during operation. It consists of a hollow gun metal body screwed into the fire box crown. And if any such thing happens the plug would fail to respond. Diagram of fusible plug.
Diagram of fusible plug. The body has a hexagonal flange to tighten it into the shell. 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. Fusible links perform the same basic function as fuses but they go about it in a slightly different way. The video focuses on fusible plugs used in compressed air and steam boiler systems. Steam stop valve diagram.
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. A gun metal plug. The initial use of the fusible plug was as a safety precaution against low water levels in steam engine boilers but later applications. 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. The working of a fusible plug is not 100 foolproof. It shows the elements of the circuit as simplified shapes and also the power as well as signal links in between the gadgets.
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. In case the water level falls below the danger levels the fusible plug gets exposed to steam.
Gallery of Fusible Plug Diagram
