To keep the nonpotable water from leaking back into the city water supply, an alarm check valve can be installed. The alarm check valve is a small device consisting of a spring, valve. The j1 alarm check valve trim allows installation of pressure switches to operate local electric alarms andor remote electric alarms during a sustained flow of water such as the flow required by an open sprinkler. Bureau veritas maritime approval series 751 firelock and 752 retard chamber. Victaulic series 717r firelock riser check valve check. When the sprinkler system is placed into service, water is allowed to flow into the system until the system pressure and the supply pressure are equal. Alarm valve modelh fireguard safety equipment co ltd. A swing check valve can act as an alarm check valve for a wetpipe fire sprinkler system, but only when that valve can sound an alarm. It is most important to ensure a clean water supply free of debris and solid particles such as sand, gravel, or mud. Alarm check valve shall be equipped with a water motoroperated mechanical alarm or pressure switch to initiate an electric alarm. Includes upstream and downstream pressure taps, must specify riser check kit.
Water flow alarm check valve plan view alternate no. It is a holding tank to prevent activation of the sprinkler alarm during water pressure surge, but permits the activation of alarm on sustained flow. Claval check valves fire protection products claval. As the most common type of system, wet sprinkler systems have water available at the sprinkler, so when a fire occurs, and the sprinkler activates, water.
There are two typical types of wet sprinkler system risers to choose from a riser alarm check valve assembly or a ported check valve with a flow indicator. Approved by fm approvals, and other fire insurance and governmental agencies in the united states and foreign countries. One sprinkler alarm may be connected to one or maximum of three alarm lines of separate fire systems. Fire valves the valve is installed in the oil supply pipeline outside the building with the sensor mounted firmly inside the appliance above the burner. Firelock alarm check valve series 751 installation poster. Meanwhile, in the event of variable pressure condition, false alarm is prevented with provision of retard chamber at the external bypass. The valve is designed to initiate an alarm during a sustained flow of water such as the flow required by an open sprinkler by operating an optional water motor alarm andor alarm.
When the fire sprinkler head is activated, the alarm check valve opens. The alarm check valve is designed to initiate an alarm during a sustained flow of water by operating an optional water motor alarm andor a. If no water flows out of the test line, add priming water. Prevents the reverse flow of water from the system piping to the water supply. When the valve opens, the alarm port is exposed to the incoming water supply. Pocket guide to inspecting, testing and maintaining fire.
An alarm check valve is basically a check valve with an alarm port. The model cva swing check valve has a lightweight high density cast iron body with a solid bronze, rubber faced swing clapper. The pressure switch detects the pressure change and sends an alarm. Globe 8 models h1, h2, and h3 alarm check valves may be installed in the vertical position and trim can be provided for both variable and constant water supply pressures. The valve is trimmed with a water bypass line, which has an inline swing check valve. The sprinkler alarm should not be located more than 1. Description alarm valve is a double seated clapper check valve with grooved seat design, which ensures positive water flow for alarm operation and is designed for installation in wet pipe sprinkler system.
The check valve is not leaking the automatic drain valve is in place and operating properly the fire department connection clappers is in place and operating properly. An alarm check valve can be activated or opened in one of two basic ways. Firelock european fire protection valves series 751, 764, 768, and 769 alarm kit trim instructions europe only. Residential shutoff valve, dualpurpose water supply, domestic and fire sprinkler system. Automatic sprinkler system valve tamper supervision. An alarm valve prevents a reverse flow of water from the installation into the firepump room, but in case a fire sprinkler is activated opened due to fire, the alarm valve will open and permit. In the event of variable pressure condition, false alarm is prevented with the. Check valves are gravity operated and may be used for both horizontal and vertical installations.
Alarm valve is a double seated clapper check valve with grooved seat design, which ensures positive water flow for alarm operation and is designed for installation in wet pipe sprinkler system. For interconnecting more than one sprinkler alarm, a swing check valve in each line need to be provided. Bureau veritas maritime approval style 751 and style 752. General technical description data tyco fire products. Once the pressures stabilize, the alarm check valve is in service and the centrally located groove in the seat ring is sealed. Alarm check valve 4100 mm, 6150 mm, 8200 mm sizes with model e3 trim listed by underwriters laboratories, inc. Tpmc provides a complete alarm check valve set in ul listed fm approved. Its operation in a wet pipe sprinkler system is as follows. Globe alarm check valve installation and maintenance guide page i table of contents april 2004 bulletin a. Once the alarm check valves are activated, they will allow water to flow through the system, engaging the sprinkler system as and where needed in order to suppress a potential fire. The viking model j1 alarm check valve serves as a check valve by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping. And deluge system is used in conditions that require quick application of large volumes of water, such as storage tank, equipment pits, conveyor protection, etc. Check dry valve priming water level by opening the test valve and checking for a small amount of water to discharge.
Features an elastomer encapsulated disc with an electroless nickel plated seat. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The model j1 alarm check valve may be installed in the vertical position with direction of flow up, or in the horizontal position with the access cover up. Our fire alarm and security installation and maintenance company has recently taken over the testing and maintenance of fire alarm systems installed in one of the. The alarm port can be used to direct water to a water motor alarm or an alarm pressure switch used to alert nearby personnel to the systems activation or send a signal to a fire alarm control panel.
Deluge valve is a quick release, hydraulically operated diaphragm valve used in a deluge system. Retarding chamber is used with alarm valve trim when variable pressure is anticipated in the system. Nfpa rd city water main city control valve sprinkler control valve water meter domestic shutoff to domestic system to sprinkler system pressure gauge pressure gauge water. Any alarm check valve should be carefully tested, examined, and cleaned periodically in accordance with nfpa 25. Verify that the appropriate trim chart and technical data for the alarm check valve and associated equipment are available. In this video from the know more risk series, learn about the arrangement, operation and alarm testing of a wet sprinkler system that uses an alarm check valve and water flow pressure switch. Page 1 imsa journal marchapril 2010 automatic sprinkler system valve tamper supervision by dean k. Home fire fighting solutions alarm check valve assembly retard chamber.
Alarm check valve is core element in wet pipe fire sprinkler systems. It serves a dual purpose which prevents a reverse flow of water nonreturn, also provides for the use of the water motor gong. External bypass prevents false alarm under all supply pressure condition. Model rm1 riser manifold commercial and residential. Consequently, with the alarm check valve set for service, there is no flow through the alarm port to the alarm devices i.
Alarm check valves shall be ul listed and fm approved. Sprinkler system animation alarm valve activated youtube. The body of the alarm check valve is constructed of high tensile strength cast iron having considerable ductility to. The use of remote sensing fire valves is covered by bs 5410. Victaulic series 751 firelock alarm check valve alarm. The globe model h1, h2 and h3 alarm check valves are used in wet pipe fire sprinkler systems. Alarm valve includes trim packages valves, gauges, pressure switch, fittings and nipples to provide retard chamber connection,drain connections and alarm test bypass. Standard for the inspection, testing, and maintenance of. If the bell alarm is electrical or connected to a fire alarm system per nfpa 72 and not mechanical, i would approve a check valve. They primarily serve a dual purpose in that they prevent a reverse flow of water through their bodies nonreturn and also provide for the use of a hydraulic fire alarm which is not dependent upon an electrical power supply for its operation. A pressure switch is connected to the alarm port of the alarm check valve. Claval 1701 placentia avenue, costa mesa, ca 926274416 phone. The model 353 alarm valve is the type of alarm check valve which has a grooved seat ring and an external bypass. Wet system valves & water motor alarm model av0 alarm check valve 300 psi 20,7 bar 212 to 8 dn65 to dn200 vertical or horizontal installation model rc1 retard chamber for variable pressure wet pipe sprinkler systems 300 psi 20,7 bar model wma1 water motor alarm hydraulically operated mechanical sprinkler alarm.
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