Please enter or update the user part number and a comment optional. Once installed, the thermal fuse plug requires no attention. It is fitted to the crown plate of the furnace or the fire box. Plugin protective devices all powrway iii plugin units are designed with the safety of the installer and user as the key criteria. Fusible plugs are thermally operated nonreclosing pressure relief devices to function by the yielding or melting of the fusible alloy. The initial use of the fusible plug was as a safety precaution against low water. One end of the plug is attached to the tirehot gases while the other is in contact with water.
Fusible fittings warning fusible fittings contain an eutectic alloy plug. Any updates you make will overwrite existing information. Meticulously controlled fusible alloy ensures accurate and consistent melt temperatures fusible alloy is cast into plug body to ensure an extremely strong bond between alloy and plug body fusible plug stamped with fusible metal yield temperature. The fusible plugs protect the turbo coupling against damage due to thermal overload. All fusible plugs are tested in accordance to ul 207, section 16. They are used as safety equipment with the aim to take a fire and automatically activate all the. A fusible panel can be manually or automatically activated to operate the delugefoam fire suppression system and to remove the air supply from the shut down panel. After this light goes out, move the lever into the most forward position. Fusible links are a vital part of a fire protection program. Fuse plug is applicable where heat could initiate fire or an explosive chemical reaction. Fusible plugs article about fusible plugs by the free. Here you will find listings of fusible plug, fusible plug manufacturers, fusible plug suppliers and exporters. A fusible plug, also known as a threaded fusible plug, is one such device commonly used in steam engines.
Only those trained, deemed competent and authorised should be responsible for the inspection of fusible plugs and plug holes, and refitting of fusible plugs. The working of a fusible plug is not 100% foolproof. They are for use in conjunction with automatic closing devices for fire doors. Outsidefireside made in the usa, manufactured by stellar industrial technologies more info. This hole is sealed with a metal of low melting point that flows away if a predetermined, high temperature is reached.
There could be several cases, because of which, the metal sealant may become oxidized, and this might result in increasing its melting point. A fusible plug operates as a safety valve when dangerous temperatures, rather than dangerous pressures, are reached in a closed vessel. This specification only applies to the test procedure for temperature rating. The following features are standard for both fusible and circuit breaker type plugin units. To put off the fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit and thus avoids the explosion which may. Fusible plug article about fusible plug by the free. The heritage railway association has used its best endeavours to ensure that the content of this document is accurate, complete and suitable for its. If the fitting is exposed to temperatures at or above this melting point, the eutectic alloy plug will melt and the pressure inside the fitting will be released to atmosphere. Powrway iii bus plugs have extended ground and neutral bars. Corrosion resistant construction and available in brass or stainless steel fusible plugs are limited to be used in applications where the service pressure does not exceed 500 psig 3,440 kpa. Globe technologies is the industryleading manufacturer of fusible valves, specifically designed to handle pneumatic applications. And, if any such thing happens, the plug would fail to respond. There are 79 suppliers who sells fusible plug on, mainly located in asia. An investigation of fusible tin boiler plugs nist page.
A wide variety of fusible plug options are available to you, such as hexagon. The initial use of the fusible plug was as a safety precaution against low water levels in steam engine boilers, but later. Mpw is a mechanical, cable mountable plug version of the standard, 3prong, british plug bs 63 with a a fuse. You can also choose from equal, reducing fusible plug, as well as from welding, male, and female fusible plug, and whether fusible plug is casting, or forged. Piping material used in the discharge line of a pressure relief device or fusible plug shall be the same as required for refrigerants. Note that the fusible tin still has a metallic luster at the waterside top, while the fireside bottom of the plug is dull, suggesting heavy oxidization. I would like to have some informations concerning the technology of the fusible plug loop used in our platfotm.
Fusible plug loop technology posted in refining, hydrocarbons, oil, and gas. In steam engines the fusible plug is screwed into the crown sheet the top plate of the firebox, typically extending about an. Fusible plug synonyms, fusible plug pronunciation, fusible plug translation, english dictionary definition of fusible plug. Fusible plug manufacturers, fusible plug suppliers, exporters. The manufacture, inspection and fitting of fusible plugs are safety critical tasks. The fusible plug from the authors 1911 45 hp case, cut in half lengthwise to show the fusible material and its apparent change in composition from one end to the other. These listed manufacturing companies are providing high quality fusible plug at affordable prices. That is the reason the reliability of this device is always put to test as a last resort. Eaton itap364, fusible, disconnect switches, busway. Creep is a word used to define the appearance of fusible alloy extrusion as it protrudes out beyond the body. The fusible plug is a piece of metal or alloy stopping an aperture in some part of the boiler which is directly exposed to the fire, and of such a composition as to melt at a temperature lower than that at which the pressure of the steam would become dangerous. Fitok tube fittings, valves, tubing, sampling systems.
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. Panel is equipped with an explosion switch to indicate the activation of a fusible plug. It is fitted on the fire box crown plate or over the combustion chamber at its appropriate place. This mechanical plug is available for manual assembly. Stainless steel swagelok tube fitting, fusible tube. Hello,im safety engineer and im working on an offshore project. F is reached, an internal ring melts and a plug releases, allowing the gas to exit through the gas bleed ports in the side of the thermal fuse plug. It ensures that should water levels recede to dangerous levels, operators will be alerted by a loud stream of steam, allowing them to take action. It protects the boiler against damage due to overheating for low water level. Records should be kept of the action taken at each washout and by whom. The fusible boiler plug in its usual form consists of a brass or bronze casing with external pipe thread, filled from end to end with a fusible metal.
Fusible plug definition of fusible plug by the free. Simply open up the casing by removing the screws, and feed your stripped wire through to. Fireside fusible plug model 28403 conforms to asme standards, with maximum pressure of 250 lbs. Swagelok products and services are delivered locally through a network of more than 200 authorized sales and service centers that support. Fusible plug loop technology refining, hydrocarbons, oil. Busway, fusible for help with bus plug 200a 600v class h 34w from eaton also known as. Thermal fuse plugs, gmp6 ce certified model code gmp610ce1637. A fusible plug having an operating temperature of 90 95c comprising a metal blank sealed with an alloy characterized. This temperature sensitive pressure release safety device is used in compressed air and gas applications, nuclear power plant applications as well as other uses. This dasma technical data sheet provides information for the selection, installation and. A fusible plug is used in closed vessels, such as air conditioning systems, as a safety precaution against predetermined, high temperatures.
Fusible plugs are used on some boilers to provide added protection against low water. Technical bulletin fusible plug pressure rating mueller. Vented pressure relief valve assemblies for use in conjunction with 650 externalstyle relief. Elsie manufacturing has a three week lead time for the. A fusible plug is a threaded metal cylinder usually of bronze, brass or gunmetal, with a tapered hole drilled completely through its length. Fusible plugs are installed between the fireside of either the plate, flue or tube of the boiler and below the water level. The eutectic alloy plug has a specific melting point see table on other side. The standard provides an exception to this requirement to permit the use of type f buttweld pipe for vent systems discharging to atmosphere. The fusible plug is a very efficient component with no need of maintenance. Boiler room log books, fusible plugs and accessories. Fuse plug alloy metal melts or yields at the rated temperature. When the plug is under pressure, the alloy can begin to creep as the temperature approaches the alloys plastic range. It is seems that fusible plug loop pressurised by instrument air is an old technology. Plug in tool and put the lever in the center position.
Fusible plug pressure rating mueller refrigeration. Created with brass, bronze or gunmetal, fusible plugs are formed with a tapered hole. A fusible plug is a threaded metal cylinder usually of bronze, brass or gunmetal, with a tapered. Ratchet the trigger until resistance is felt and note the amber led coming on to indicate that cooling has begun. Special temperatures available for use in air line or pipe thread applications. They are constructed of bronze or brass with a tapered hole drilled lengthwise through the plug.
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