Fire Protection Equipment

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1 Fire Protection Equipment #SVL100 Model 353 Alarm Valves "Automatic" Sprinkler 150 Gordon Drive Exton, PA USA Tel: (610) Fax: (610)

2 TABLE OF CONTENTS Text Page General... 1 Approvals... 1 Description / Operation... 1 Variable Pressure... 1 Constant Pressure... 2 Figure 1 Operation Diagram: Model 353 Alarm Valve with Model B Retard Chamber Set Position... 2 Figure 2 Operation Diagram: Model 353 Alarm Valve with Model B Retard Chamber Operating Position... 2 Technical Data... 3 Ordering Information... 3 "Automatic" Model 353 Valve Assemblies Parts List... 4 "Automatic" Model B Retard Chamber Parts List... 5 "Automatic" 4 Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3534V with Retard Chamber Parts Drawing & List... 6 "Automatic" 4 Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3534C Parts Drawing & List... 7 "Automatic" 6 Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3536V with Retard Chamber Parts Drawing & List... 8 "Automatic" 6 Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3536C Parts Drawing & List... 9 "Automatic" 8 Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3538V with Retard Chamber Parts Drawing & List "Automatic" 8 Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3538C Parts Drawing & List Testing and Maintenance Testing Testing Alarm Valve and Waterflow Alarm Devices Flow Test at Main Drain Valve (Main Drain Test) Maintenance Clapper Facing Seat Ring ByPass Check Valve Retard Chamber Alarm Line Strainer i SVL100

3 Alarm Test Valve, Main Drain Valve & Inspection Test Valve Alarm Valve and Trim Resetting of System "Automatic" Model 353 Alarm Valves LPCB Approved SVL100 ii

4

5 DATA SHEET #SVL100 MODEL 353 Alarm Valves General The "Automatic" Model 353 Alarm Valve is a waterflow alarm device designed for installation in the main supply to a wet pipe sprinkler system. Its purpose is to actuate a fire alarm when a flow of water from the system equals or exceeds that of a single sprinkler. The alarm may be accomplished in two ways: (1) mechanically by means of a water flow to a water motor alarm and/or (2) electrically via a waterpressureactuated alarm switch (circuit closer) connected to an electrically operated signaling device such as a bell or light. The Model 353 Alarm Valve, available in 4" (101.6 mm), 6" (152.4 mm) and 8" (203.2 mm) pipe sizes for vertical installation, may be provided with either of two basic trim packages. There is one set of trim for variable supply pressure and another for constant supply pressure. Variable pressure trim is used where the water supply pressure fluctuates. A public water main is an example of such a supply. To prevent false alarms caused by surges or fluctuations in pressure, the trim set is provided with the "Automatic" Model B Retard Chamber. For installations where there is a constant supply pressure, that is, where the water pressure does not fluctuate, the retard chamber is omitted. For example, constant pressure trim may be used when the water supply is from an elevated tank or pressure tank. An excess pressure pump may be required for installtions where excessive pressure surges or extreme fluctuations in the water pressure are encountered. Approvals Underwriters Laboratories (UL) Factory Mutual (FM) Underwriters Laboratories Of Canada (ULC) Loss Prevention Certification Board (LPCB) The valves are listed/approved with specific trim and for installation in accordance with the applicable requirements of NFPA 13. Therefore, no substitutions or omissions, in part or in full, are allowed. Model B Retard Chambers are listed and approved for use specifically with the Model 353 Alarm Valves. All devices are listed/approved for a maximum water working pressure (WWP) of 175 psi ( kpa or 12.1 bar). Description / Operation The Model 353 Alarm Valve is the type of alarm check valve which has a grooved seat ring and an external bypass. Its operation in a wet pipe sprinkler system is as follows: 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. The system pressure then causes the rubberfaced clapper of the alarm valve to close tightly on the grooved seat ring. It will remain in this closed position as long as the pressure in the system is equal to or greater than the supply pressure. See Figure 1. Variable Pressure. In service, the pressure on the system, most often, will be found to be greater than the water supply pressure. This condition exists because excess pressure from surges and fluctuations in the water supply are allowed to pass through the external checked bypass to be trapped in th esystem above the alarm valve clapper. Normally then, the clapper will remain in a closed position. At times, however, sudden surges of greater pressure may cause the clapper to open momentarily, then close. In such instances, when the clapper is open, there will be a limited flow of water through the seat ring openings and into the retard chamber. There the water can accumulate, then drain away without causing a false alarm. When a sprinkler operates, the resulting water flow relieves the system pressure. The greater supply pressure then causes the alarm valve clapper to open, thereby permitting an unobstructed flow of water into the system. At the same time, water flows through the seat ring openings and

6 via alarm line connections into the retard chamber. But now, with the system operating, the clapper remains in an open position and the volume of water flowing through the alarm line is such that the retard chamber drain cannot keep up with the incoming flow. The chamber quickly fills and the water flow continues on to sound the water motor alarm and/or operate the pressure actuated electric alarm switch. See Figure 2. Caution: All sprinkler systems contain a certain amount of confined air. It is possible that a pressure surge could compress this air and allow the alarm valve clapper to move off the seat ring. Under some conditions, this could cause false alarms. It is recommended, therefore, that the installer bleed off the confind air and fill the system with water to the fullest extent possible. Constant Pressure. Under normal conditions the system and supply pressures will be the same. Since the pressure is constant, there is no need to consider surges and fluctuations. Therefore, a retard chamber is not provided. When a sprinkler operates, the system pressure drops, allowing the alarm valve clapper to open. At the same time that water enters the system, it also flows through the seat ring openings and then via the alarm line connections directly to operate the alarm devices. 2 SVL100

7 Technical Data Available Sizes:... 4" (101.6 mm) 6" (152.4 mm) 8" (203.2 mm) Inlet & Outlet:... Class 125 Flanged Water Working Pressure: psi ( kpa or 12.1 bar) Setup For:... Variable Pressure Constant Pressure Listings & Approvals:... UL Listed FM Approved ULC Listed LPCB Approved Pressure Loss: For use in hydraulic calculations, the pressure loss through the alarm valve may be expressed as equivalent feet of pipe: 4" Valve = 9 Ft 6" Valve = 37 Ft 8" Valve = 18 Ft Conversion Factors: 1 inch = 25.4 millimeters (mm) 1 psi = kilopascals (kpa) bar 1 gallon = liters (L) 2 HA I I K HA E F I E 2 = % " &! #! " #! %! & $ ' #! " %! % # %! $ 2 H A I I K H A I I + K H L A I " E $ # & '! $ E # "! % & # M E C F E & E!! # % # %! # # & ' # Ordering Information "Automatic" Model 353 Alarm Valves Flange/Flange 4" Valve 6" Valve 8" Valve Item/Setup Symbol Part Symbol Part Symbol Part Alarm Valve only (without trim) Trim setup for Alarm Valve: For Variable Pressure (less Retard Chamber) For Constant Pressure 3534V 3534C V 3536C V 3538C Retard Chamber Automatic Model B Note: Retard Chamber is to be ordered separately and in addition to the trim setup for variable pressure Trim Option for Alarm Switch (less Switch) 86A A A Alarm Valve, PreTrimmed For Variable Pressure, Retard Chamber included SVL100 3

8 "Automatic" Model 353 Valve Assemblies Parts List "Automatic" Model 353 Alarm Valve Assemblies Flange/Flange 4 Valve 6 Valve 8 Valve Item Part Name Material Symbol Part Symbol Part Symbol Part 1 2 Valve Body Subassembly Body Seat Ring Cast Iron Bronze S S S Handhole Cover Nameplate Drive Screws: #0 x ¼ 2 required Handhole Cover Gasket Hex Head Cap Screws 5/16 18 x 11/4 long 6 required 3/8 16 x 11/2 long 6 required ½ 13 x 11/2 long 6 required Cast Iron Aluminum Steel Rubber Steel Steel Steel Clapper Subassembly Clapper Clapper Clapper Facing Retaining Disc Retaining Disc Shoulder Bolt Shoulder Bolt Gasket SelfLocking Nut: 3/8 16 3/8 16 x 1 Cap Screw (1 req.) 3/8 Lock washer (1 required) Stainless Steel Bronze Rubber Stainless Steel Bronze Brass Rubber Stainless Steel Stainless Steel Stainless Steel S S S Hinge Pin Hinge Pin Bushings (2 in Body) 3/8 Plug 1/2 Plug Stainless Steel Bronze Brass Brass Handhole cover and related items are not shown in detail. These items are not field replaceable. Not required for 8 size. 4 SVL100

9 "Automatic" Model B Retard Chamber Parts List "Automatic" Model B Retard Chamber Item Part Name Material Symbol Part 1 Retard Chamber Body Cast Iron Outlet Plug Assembly S Outlet Plug Screen Brass Brass 3 Drain Plug Assembly S Drain Plug Screen Brass Brass 4 ORing Gasket BunaN SVL100 5

10 "Automatic" 4" Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3534V with Retard Chamber 6 SVL100

11 "Automatic" 4" Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3534C SVL100 7

12 "Automatic" 6" Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3536V with Retard Chamber 8 SVL100

13 "Automatic" 6" Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3536C SVL100 9

14 "Automatic" 8" Model 353 Alarm Valve Flange/Flange Vertical/Variable Pressure Trim Setup 3538V with Retard Chamber 10 SVL100

15 "Automatic" 8" Model 353 Alarm Valve Flange/Flange Vertical/Constant Pressure Trim Setup 3538C SVL100 11

16 Testing and Maintenance Reference. NFPA 25, Standard for the Inspection, Testing and Maintenance of Water Based Fire Protection Systems. Testing Before proceeding with any tests involving water flow, certain precautions need to be taken. 1. Check the location where the test connection discharges to make sure that all is clear and that there is no possibility of the water flow causing damage or injury. 2. Check the end of the test connection to make sure that it is unobstructed. To obtain a satisfactory test, there must be an unrestricted flow of water when the test valve is wide open. 3. Check for alarm connections to a central station or fire department. If such connections are found, give proper notice to the signal receiving station before proceeding with the test. Note: A main drain test will also operate local fire alarms unless they are temporarily shut off. Testing Alarm Valve and Waterflow Alarm Devices. NFPA 25 recommends that the alarm valve and its waterflow alarm devices be tested at least quarterly. The primary way to test this equipment is by opening the Inspectors Test Connection. This connection, generally located at the highest and most remote point on the system in relation to the alarm valve, consists of a test orifice and controlling globe valve. Opening of the globe valve (Inspectors Test Valve), and the subsequent discharge of water through the test orifice, simulates the operation of a sprinkler. Therefore, alarm devices should sound and/or operate when the Inspectors Test Valve is opened. An alternate means of testing waterflow alarm devices is to open the Alarm Test Valve provided as part of the alarm valve trim. It must be noted, however, that opening of this valve only tests the alarms; it does not test the operation of the alarm valve since the supply for the alarm test line is taken from a point below the alarm valve clapper (see Description/Operation). This means of testing, therefore, should only be used when weather conditions or other circumstances prohibit using the Inspectors Test Connection. Note: If alarms connect to a central station or fire department, notify the signal receiving station when all tests have been completed. Flow Test at Main Drain Valve (Main Drain Test). NFPA 25 recommends that a water flow test be made quarterly from the main drain valve at the system riser. The purpose of this test is to show whether or not the normal water supply is available to the system. By comparing static and residual pressure readings with those previously established, a main drain test can indicate the possible presence of closed valves or other obstructions in the supply piping. The procedure for conducting a Main Drain Test is as follows: 1. With the Main Drain Valve closed, note and record the reading on the lower Pressure Gage at the Alarm Valve. 2. Open the Main Drain Valve slowly until it is fully open. Then, check to make sure that a full steady flow of water is discharging from the main drain pipe. Note: If a full steady stream is not discharging, check the main drain piping further for possible obstructions. 3. Allow the water to flow until the reading on the lower Pressure Gage drops and stabilizes. Then, record this reading. Note: The first and higher pressure reading is the static pressure. The second, lower reading is the residual pressure with a given flow discharging from the main drain pipe. 4. Close the Main Drain Valve slowly. Caution: If alarms have been temporarily shut off, they must be returned to service. If alarms connect to a central station or fire department, notify the signal receiving station when the test has been completed. 5. Compare both pressure readings with previously established or normal readings. Note: If the readings compare favorably, the water supply may be considered satisfactory. If, however, the pressure readings vary to any great extent, the condition should be investigated to determine the cause. Some possible causes are: Partially or totally closed system control valves. Clogged or frozen water mains. Serious leakage at valves or mains. 12 SVL100

17 Maintenance The "Automatic" Model 353 Alarm Valve and its related equipment should be examined periodically to ensure proper operation and trouble free service. Several areas to be routinely inspected are: Clapper Facing. The rubber clapper facing should be checked for wear or damage, and to determine that it is free of dirt and other foreign substances. If found to be worn or damaged (e.g., foreign matter imbedded in the surface), the facing should be replaced. If it is dirty, it should be cleaned, but compounds which could damage the rubber facing must never be used. Seat Ring. The seat ring should be checked for nicks and for stones, dirt or other foreign matter lodged in the grooves or holes. It should be cleaned thoroughly. If the seat ring is found to be severely damaged, the complete alarm valve assembly should be replaced. ByPass Check Valve. The 3/4" check valve in the external bypass should be checked for clapper and seat condition. Retard Chamber. The outlet plug and drain plug assemblies should be checked for obstructions. The screens should be cleaned thoroughly. Alarm Line Strainer. The 3/4" strainer in the alarm line of the constant pressure trim setup should be checked and cleaned thoroughly. Alarm Test Valve, Main Drain Valve & Inspection Test Valve. All controlling valves which are normally closed when the alarm valve is in the set position should be checked to be sure that they are fully closed and not leaking. Alarm Valve and Trim. The overall setup should be checked for visible leaks and possible physical damage to the valve and connections (e.g., broken gages). Resetting of System The "Automatic" Model 353 Alarm Valve is selfresetting when testing procedures are followed. When sprinklers operate, however, there are certain procedures which must be followed for restoring the system to service. 1. Close the System Control Valve (OS&Y, PIV or other). Caution: In the event of a fire, the system control valve is to be closed only after it has been determined, positively, that the fire has been extinguished. 2. Close the Alarm Control Valve. 3. Open the Main Drain Valve. Note: It is necessary to drain the system only as required to allow for sprinkler replacement. 4. Replace the sprinklers which have operated. 5. Close the Main Drain Valve. 6. Open the Inspectors Test Valve. Note: This valve is opened to permit air to be vented from the system as it is being filled with water. 7. Slowly open the System Control Valve. Caution: Open the valve only partially at the stsrt of water flow into the system. Do not open it fully at this point. To do so may cause a water hammer to occur which could either damage the piping or trap large volumes of air within the system. 8. Continue filling the system until water discharges in a continuous stream from the Inspectors Test Connection. 9. Close the Inspectors Test Connection. 10. Turn the System Control Valve to its full open position, at the same time observing the Pressure Gages. Note: The system is filled when both gages are steady and have the same pressure reading. 11. Conduct a Main Drain Test to make sure the water supply is satisfactory (see Flow Test at Main Drain Valve). 12. Open the Alarm Control Valve. 13. Conduct a test of the alarm devices (see Testing Alarm Valve and Waterflow Alarm Devices). 14. Seal, lock, or otherwise secure the System Control Valve and Alarm Control Valve in an open position (per NFPA 25). The system is now ready for service. 15. If alarms connect to a central station or fire department, notify the signal receiving station that the system has been returned to service. SVL100 13

18 "Automatic" Model 353 Alarm Valves LPCB Approved "Automatic" Model 353 Alarm Valves are also approved by the Loss Prevention Certification Board (LPCB). For LPCB approved valves, however, the trim setups differ from those required for UL/FM/ULC approval. It must be noted that in a fire situation, with all setups, the operation of the alarm valve is the same (see Description/Operation). The difference in setup occurs only in the arrangement of test connections. With UL/FM/ULC approved valves, the Alarm Test Valve in the alarm valve trim is just for testing the waterflow alarm devices. It cannot be used to test the operation of the alarm valve itself since the supply to the alarm test line is from a point below the alarm valve clapper ( see Testing Alarm Valve and Waterflow Alarm Devices). To meet LPCB approval, a means must be provided at the alarm valve for testing both the valve and its waterflow alarm devices. To accomplish this, the alarm test line is arranged to take its supply from above the valve clapper. And, in addition to the Alarm Test Valve, an Orifice Union is provided to simulate the operation of a sprinkler when the test valve is opened. For information on LPCB approved alarm valves, refer to Bulletin 303FOC. 14 SVL100

19

20 This information is only a general guideline. The company reserves the right to change any portion of this information without notice. Terms and conditions of sale apply and are available on request. 2/02 Printed in USA (SLV100.P65) "Automatic" Sprinkler 150 Gordon Drive Exton, PA USA Tel: (610) Fax: (610)

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