ALARM VALVE MODEL-H (DUCTILE IRON)
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ALARM VALVE HD FIRE PROTECT PVT. LTD. MODEL-H (DUCTILE IRON) TECHNICAL DATA MODEL Flange X Flange Flange X Groove Groove X Groove NOMINAL SIZE MAXIMUM SERVICE 17.6 kg/sq.cm (250 psi)* PRESSURE THREADED OPENING BSPT MOUNTING Vertical FLANGE CONNECTION ANSI B16.42 #150 (Flange drilling matching to ANSI B 16.5#150) Standard Supply. Galvanized fittings with Brass Valves FACTORY HYDROSTATIC TEST PRESSURE FRICTIONAL LOSS 200 NB IN TERMS OF 150 NB EQUIVALENT LENGTH 100 NB OF PIPE ( C-120 ) 80 NB FINISH Mtrs. Mtrs. Mtrs. Mtrs. APPROVAL UL Listed & FM Approved ORDERING INFORMATION Specify size of valve, trim details, grooved valve pipe outside diameter. * For 200 NB, FM approval is rated upto 200 psi (14 kg/sq.cm) Flange X Flange Flange X Groove Groove X Groove GROOVE PIPE SIZE NORMAL SIZE NOTE: FOR 6” (150 NB) STANDARD SUPPL IS 168.3 mm OD PIPE Y GROOVE. FOR 165.1mm REQUIREMENT, SPECIFY IN ORDER Operation of one or more automatic fire sprinklers causes the water to flow into the sprinkler system causing the alarm valve to open, allowing continuous flow of water into the system and transmittal of alarms, both electrical and mechanical. WEIGHT IN KG Valve Size 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. External bypass prevents false alarm under all supply pressure condition. In the event of variable pressure condition, false alarm is prevented with the provision of retard chamber, thus the design allows for installation under both variable and constant supply pressure condition. The fire protection system initially when being pressurized, will allow water to flow into the system until water supply and system pressure is equalized and the clapper closes the waterway. Once the pressure is stabilized, the fire protection system is ready to be placed in service and then the alarm control valve must be opened. Under normal condition, the water pressure gauge connected to the system side of the alarm valve would show a higher or equal pressure reading than the water pressure gauge connected to the supply side of the valve. This occurs because of the bypass line connecting downstream and upstream side of the alarm valve, which allows water pressure surge to pass without lifting the valve clapper off its seat, thereby causing excessive high pressure surge entrapped in the system side due to presence of a check valve, which generally prevents false alarm.

HD FIRE PROTECT PVT. LTD. Sudden high pressure surge, as might be encountered by start-up of a large fire pump may lead the valve clapper to lift momentarily, allowing water to flow through grooves in the valve seat to the retard chamber. The water in the alarm line is automatically drained out, which helps to prevent false alarm due to successive transient surge in supply pressure. The restriction assembly located beneath the retard chamber consists of inlet and drain restriction orifices, which are established by considering the volume of the retard chamber to meet the listing and...

Inspect the valve rubber clapper face. If worn or damaged, replace it. Be certain that dirt, stone or any other foreign object have not accumulated under the clapper face and lodged in the groove or holes. Clean the clapper face thoroughly. If the seat ring surface is nicked or scoured, it might be possible to repair the same using lapping compound. If not, replace the complete valve or return it to the manufacturer’s works for repair. If sprinkler alarm bell is not functioning or the impeller is jammed, please follow the maintenance guidelines provided in the catalogue for sprinkler alarm...

ALARM VALVE, MODEL – H SIZE 200 / 150 / 100 / 80 NB PART LIST PART NO. MATERIAL SPECIFICATION HOUSING (FLANGE X FLANGE) DUCTILE IRON HOUSING (FLANGE X GROOVE) DUCTILE IRON HOUSING (GROOVE X GROOVE) DUCTILE IRON STAINLESS STEEL* CLAPPER BUSH STAINLESS STEEL RUBBER CLAMP STAINLESS STEEL RUBBER SEAT DUCTILE IRON STAINLESS STEEL BODY BUSH DUCTILE IRON COVER GASKET DUCTILE IRON * Stainless Steel is a standard supply, Bronze is an optional supply ** EPDM is a standard supply, Neoprene is an optional supply NA : Not Applicable as these parts cannot be replaced

Nominal Pressure Loss vs Flow - Alarm Valve (Model H) Flow Rate - Gallons Per Minute (gpm) 3 Nominal Pressure Loss in bar Nominal Pressure Loss in psi Flow Rate - Litres Per Minute (lpm)

CONSTANT PRESSURE TRIM FOR ALARM VALVE MODEL - H 200 / 150 / 100 / 80 NB - PRESSURE SWITCH (OPTIONAL) @ - NOT SUPPLIED WHEN PRESSURE SWITCH IS ORDERED D - TO OPEN DRAIN - STANDARD LENGTH SUPPLY OR USER TO SPECIFY (TO SUIT AT SITE) FOR ANY ALTERATIONS . NO - NORMALLY OPEN NC - NORMALLY CLOSED

CONSTANT PRESSURE TRIM FOR ALARM VALVE MODEL - H 200 / 150 / 100 / 80 NB ITEM NO. HEX NIPPLE TEE ELBOW ELBOW PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE UNION UNION SWING CHECK VALVE SWING CHECK VALVE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE BALL VALVE REDUCING HEX NIPPLE REDUCING HEX NIPPLE REDUCING HEX NIPPLE BALL VALVE HEX NIPPLE ELBOW PRESSURE GUAGE ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y REDUCING BUSH RESTRICTION NOZZLE ASSEMBL Y ‘Y‘ TYPE STRAINER PLUG SPRINKLER ALARM HEX...

VARIABLE PRESSURE TRIM FOR ALARM VALVE MODEL - H 200 / 150 / 100 / 80 NB - PRESSURE SWITCH (OPTIONAL) @ - NOT SUPPLIED WHEN PRESSURE SWITCH IS ORDERED D - TO OPEN DRAIN - STANDARD LENGTH SUPPLY OR USER TO SPECIFY (TO SUIT AT SITE) FOR ANY ALTERATIONS . NO - NORMALLY OPEN NC - NORMALLY CLOSED

VARIABLE PRESSURE TRIM FOR ALARM VALVE MODEL - H 200 / 150 / 100 / 80 NB ITEM NO. HEX NIPPLE TEE ELBOW ELBOW PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE UNION UNION SWING CHECK VALVE SWING CHECK VALVE PIPE NIPPLE PIPE NIPPLE PIPE NIPPLE BALL VALVE REDUCING HEX NIPPLE REDUCING HEX NIPPLE REDUCING HEX NIPPLE BALL VALVE HEX NIPPLE ELBOW PRESSURE GUAGE ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y ALARM TEST LINE ASSEMBL Y REDUCING BUSH RESTRICTION NOZZLE ASSEMBL Y ‘Y‘ TYPE STRAINER PLUG SPRINKLER ALARM HEX...