Visually inspect the link to verify its not damaged. Fusible cable links are designed to attach the cable to the emergency valve cable lever arm and to provide thermal activation at the emergency valve. If there is not a shutoff valve at the unit, one should be installed. Fire safe fusible link valves installation and operation manual. Assured automations fm firesafe fusible link manual. Contact your local distributor or avk carbobond for replacement. Fusible and frangible plug betts industries betts industries. Packages shall utilize a soldered fusible link and spring pack to drive the close valve open or closed when the fusible link separates. If no service valve is installed, now would be a good time to install one. Fm firesafe fusible link valves assured automation. Metso offers a wide range of valve packages applicable for all types of process conditions. Page 23 ma12 maintenance maintenance operations connect all vacuum lines i.
Ensure the correct sprinkler system has been shut off for maintenance. Design, installation, recharge, and maintenance of. Fusible link fire safe ball valves and fusible link high performance butterfly valves manual override handle and gear operator are available so that valve can be operated andor tested. The simple shutoff valve might be any plumbing valve that can manually stop oil flow in the line, but it is not a safety device.
May 02, 2017 a fusible link acts much like a fuse, only its designed to handle a different type of potentially hazardous scenario. This makes them critical when building fire suppression systems for. Make sure youve installed a fusiblelink safety valve at each location where its most needed at each oil burner. The heat from a fire will melt the fusible link, which releases the springloaded clamp assembly, relieving pressure. Never install a fire damper without the proper ul approved fusible link in place. They are placed inline between delicate harnesses and large sources of electrical.
Wound spring assembly to assure tight contact between disc and seat after valve closure 7. This fusible is designed to help satisfy requirements of 49cfr178. We believe there are no other valve and actuator solutions on the market today that can outperform jamesbury valves. The valves shown on this page require periodic inspection to ensure the shutoff mechanism is operating correctly. Semiannually hood suppression system automatic fire alarm sprinklers suppression system fusible link replacement control equipment fire alarm systems monitored fuses. How a fusible link firomatic osv provides offers fire protection. If a fire external to the tank should occur near the valve, the fusible link melts and the spring.
In case the overheat feature does not prevent the temperature from rising then the fusible link will break shutting off the appliance. Fusible link facts call us today for a free inspection. Make sure youve installed a fusible link safety valve at each location where its most needed at each oil burner. Typically a springloaded fusiblelink oil safety valve such as the firomatic type is used on both aboveground and underground oil supply systems to provide fire protection at the oil burner. The size of the link and the load rating in pounds for the link.
Each flpseries shall consist of a fl series fusible link assembly and an api 607 fire safe ball valve. For example, an ordinary fusible link rated at 165 degrees f has a maximum ambient temperature rating of 100. Some links are liquid filled glass bulbs, and some are pieces of metal soldered together. Using this design, the fm firesafes fusible link holds up to many years of use and, unlike other thermal shutoffs in the market, does not need to be replaced on an annual basis. The eflm is designed to shut down the 120 volt power supply feeding the controller on hydraulic equipment upon activations of the ul listed fusible link due to temperature rise reaching the melting temperature of the link.
A firesafety shutoff valve, also known by thermal shutoff valve or simply a fusible link valve, is a safety device designed to provide automatic valve shutoff in the event of a fire. The fusible link refers to the part of the valve that. Those who install, operate, recharge, or maintain these fire suppression systems should read this entire manual. Firesafety valve with a fusible link bitorq valve automation. They have several designs and models, fusible links can be heat activated at different temperatures.
When the fusible link melts the spring actuated lever is released to close the valve. Check chain attached to handle to see that it is equipped with a fusible link, protectoseal part no. These valves are designed to be used in control systems that deal with flammable, combustible, or toxic materials. What is a fusible link and how do you repair one in your car. Fm firesafe fusible link valve protects refineries and chemical processors from fire hazards. Three piece valves dm4600 full port 2000 psi high performance valve, b16. The fm firesafe shutoff fusible link valve assemblies from assured automation are api 607 and factory mutual approved for flammable liquids, and are commonly used to. Firesafety valves of this type are designed for facilities that utilize flammable or toxic gases and chemicals in their production or for fuel systems of all types. Our fire safe, fusible link valves are available in ball valves and butterfly valves for maximum configuration.
Valve can be set to open a sprinker system in case of a fire. The fusible link valve is a fire safety device and should not be used for service. Bitorq valve automations thermal shutoff valves also known as fusible link valves are designed for flow shutoff protection. At the toyostove, unplug the heater and turn off the fuel at the shutoff valve on the incoming fuel line. The roundhandled fusible link safety valve photo 3 is for fire protection, not for servicing. The fire valve will need to be recharged with lubricating grease throughout its life. Fusible link valve assemblies are found in storage tanks, carrying vessels, or mixing vessels to control the. Internal relief valve to help equalize line pressure when resetting the valve 5.
The fusible link manufacturer recommends annual replacement of links as part of a regular maintenance schedule. They release water or fire suppression chemicals when they heat up. Thanks to rick johnston for pointing out that the more likely cause of a fire safety valve in the return oil line is a burst seal on the fuel unit 462009. Automatic ball drip, sight drain, control valve seal, fill cup, inspectors test connections, pressure gauges. The valve can be manually operated to facilitate dispenser maintenance and incorporates a 38 test port. Fusible links critical in restaurants fuller fire and. A simple oil line shutoff valve may not be a fusiblelink safety valve. There are also different lengths of the fusible links. Confirm local requirements with your local authority having jurisdiction ahj. A detailed technical manual, including system description, design, instal. Emergency shear valves the emco wheaton a0060 emergency shear valve incorporates a replaceable shear section and a heat sensitive fusible link assembly. The valve should automatically return to the closed vertically up position. Fusible links critical in restaurants fuller fire and safety.
Fusible links offer protection against fire at tank farms, airports, and petroleum plants. Inspections, tests and maintenance refer to nfpa 25 for inspection, testing and maintenance requirements. Cannot be used on fm approved assemblies please consult factory for special order links. Proper installation is to have a fusible link valve only on the supply side, and to install a check valve on the return line to prevent backsiphonage from the tank.
Fusible link valves are available in sizes from 14 4 for ball valve series and 3 24 for our butterfly valve series. The fusible link assembly portion shall be fm approved. This is a form of friction hold open that employs a fusible link and springloaded clamp assembly at the hold open friction joint. Frequent maintenance of your free fall fire valve is strongly advised. With a properly plumbed system, breaking of the frangible device or melting of the fusible plug relieves pressure in the air or hydraulic line and allows the valves to close. May be purchased as a deadman handle without fusible link. Specific sections will be of particular interest depending upon ones responsibilities. If the valve handle does not freely and automatically return to the vertical up position after step 1 assume that. Under hydrant valve uvmy series installation, operation. Make sure all mfi system wiring connectors are fully connected engine should be at normal operating tempera ture switch off accessories set transmission in neutral b connect a tachometer to the engine connect the tachometer. Fusible link valve, fusible link ball valve, fusible link.
The rinnai water heater is one of the most advanced water heaters available. Maintenance instructions on back the 346 series valves are designed to shut off liquid. Jul 18, 2016 fusible links are rated by release temperature, and the load they will withstand. Overview of fusible link assemblies bitorq valve automation. Using this valve as a service valve will damage it. In normal operation the valve is manually opened to permit oil to flow to the burner. Fusible link valves are available in sizes from 14 4 for ball valve series and 3 24 for our butterfly valve series all fusible links are fm approved and have a temperature range of 165f 300f.
Manual shutoff should be present both at a remote location and at the installed location. Bitorq valve automation and our soldered fusible link manufacturers suggest the annual replacement of fusible links as part of scheduled plant maintenance. All fusible links are fm approved and have a temperature range of 165f 300f. Inspection, maintenance, testing and replacement frequency of fusible links used in fire doors after further investigation and study of the inspection, maintenance, testing and the replacement frequency of fusible links that are used as heat detectors with fire doors, globe. The fusible and frangible assembly offers two types of protection with both a thermally activated and a mechanically activated singleuse emergency shutdown feature. Series 3000 internal safety valve sizes 2 through 12 automatically closes in the event of a fire simple, one hand valve operation listed by underwriters laboratories in 2 through 12 pressure equalizing bypass valve superior flow capability easily replaceable fuse link 160 fusible link provided factory tested for positive shutoff. Fusible links are devices in fire suppression systems designed to operate at certain selected temperatures.
Availability the viking standard response fusible link pendent sprinkler vk110 is available through a network of domestic and international distributors. A firesafety shutoff valve or a thermal shutoff valve or a fusible link valve, is a safety device that provides automatic valve shutoff in case of. Private fire service maintenance nfpa 72 nfpa 25 alarm, supervisory and trouble signals. A system owners guide is available containing basic information pertaining to system operation and maintenance.
Fusible link assembly to activate unattended valves at elevated ambient temperatures. A fusible link functions as a failsafe close valve in a containment system on a gas line, which cuts the flow through the pipeline during a fire. Free fall valve operating and maintenance instructions. Fusible links for the 4 package shall be the kstyle link and be ul listed. The longer a valve performs without problems, the better. If not, operate the valve handle manually several times until valve operates satisfactorily. Maintenance refer to model number and serial number on assembly when ordering replacement parts. This manual is intended for use with ansul r102 restaurant fire suppression systems. It provides a continuous supply of hot water at a preset temperature. In the event of fire, the fusible link separates, allowing the top mounted spring. Frequency of recharging depends on several aspects. A fusible link is used to hold open a spring actuated lever.
We recommend that the valve is inspected every 3 months. Different spring packs shall be used to correspond with ball valves torques plus safety factor. Apr 30, 2015 fusible links are devices in fire suppression systems designed to operate at certain selected temperatures. Tankless water heater operation and installation manual. When a fire breaks out, the link separates when its rated temperature is met, releasing the spring pack and allowing it to close the valve. The 346 series valves are designed to shut off liquid flow in the event of a fire. Fusible element melts at not more than 250f, releasing the cable tension and allowing the emergency valve to close. A fusible link acts much like a fuse, only its designed to handle a different type of potentially hazardous scenario. Pdf models a and b automatic pressure maintenance devices. These links are actually strands of wire wrapped in a fireproof covering, and are thinner than the wiring harnesses theyre connected to.
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