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Qingdao Kingworld Control Co., Ltd.

Wet Alarm Control Valve, Alarm Valve, Wet Type Fire Alarm Valve manufacturer / supplier in China, offering AV-1-300 Wet Alarm Control Valve Tyco Alarm Valve with Trim, Tyco Fire FM UL Wet Alarm Check Valve for Fire Sprinkler System, Tyco Diaphragm Style Hydraulic Electric Deluge Valve for Fire Protection and so on.

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Supplier Homepage Product Control Valve AV-1-300 Wet Alarm Control Valve Tyco Alarm Valve with Trim

AV-1-300 Wet Alarm Control Valve Tyco Alarm Valve with Trim

FOB Price: Get Latest Price
Min. Order: 1 Piece
Port: Qingdao, China
Production Capacity: 50000/Month
Payment Terms: L/C, T/T, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: AV-1-300
  • Standard: Standard
  • Power: Hydraulic
  • Type: Self-Operated
  • Diameter: 50/65/80/100/125/150/200mm
  • Color: Red
  • Trademark: Tyco
  • Specification: ductile iron
  • HS Code: 8481804090
  • Certification: FM
  • Connection Mode: Flange
  • Material: Ductile Iron
  • The Pressure of Alarm Oral Area: >0.05MPa
  • Structure: Safety Water Power Fire Alarm Valve
  • Working Water Pressure Range: 20 to 300 Psi (1,4 to 20,7 Bar)
  • Transport Package: Packing Export Standard
  • Origin: USA
Product Description
General Description

The TYCO Model AV-1-300 Alarm Check Valves are divided seat ring, rubber-faced clapper, waterflow alarm check valves that are intended for use in wet pipe (automatic sprinkler) fire protection systems. They may be installed vertically or horizontally*, and they are designed to automatically actuate electric and/or hydraulic alarms when there is a steady flow of water into the system that is equivalent to the discharge rate of one or more sprinklers. A separately ordered Model RC-1 Retard Chamber (Ref. Technical Data Sheet TFP920) is required for installations subject to variable pressures. It is used to help prevent false alarms associated with pressure variations in public water supplies. The AV-1-300 Alarm Check Valve Trim includes pressure gauges to monitor system pressure conditions, a bypass check valve, a main drain valve, and an alarm test valve. The bypass check valve reduces the possibility of false alarms by permitting slow as well as small transient increases in water supply pressure to be passed through to the system without opening the waterway clapper.

End Connections
Groove x Groove
Flange x Groove
Flange x Flange


When the fire protection system is initially pressurized, water flows into the system until the water supply and system pressure become equalized, and the torsion Spring closes the Waterway Clapper in the Alarm Check Valve. Once the pressures stabilize, the Alarm Check Valve is in service and the centrally located groove in the Seat Ring is sealed. Consequently, with the Alarm Check Valve set for service, there is no flow through the alarm port to the alarm devices (i.e., water motor alarm and/or pressure alarm switch). When there is a steady flow of water into the sprinkler system due to a sprinkler operation, the Waterway Clapper opens as shown in Figure 2. Water is then permitted to flow into the centrally located groove in the Seat Ring and out through the alarm port towards the Restriction Assembly (Figure 3). When the flow through the Inlet Restriction of the Restriction Assembly exceeds the flow through the Outlet Restriction, the Retard Chamber (where provided for systems with variable pressure), begins to fill. Subsequently, the Water Motor Alarm and/or the pressure alarm switch will be actuated. The alarms will continue to be actuated as long as the Waterway Clapper remains open. Water in the alarm lines will automatically drain out through the 1/8 inch (3,2 mm) Drain Orifice in the Restriction Assembly (Figure 3) when the Waterway Clapper closes (due to a stop in the flow of water into the sprinkler system). For variable pressure systems, slow as well as small transient increases in water supply pressure may continue to build up in the system (via the Bypass Check Valve) without opening the Waterway Clapper. A transient surge in supply pressure that is sufficient only to open the Waterway Clapper momentarily will not cause a false alarm, and a portion of the increase in pressure will be trapped within the system, thus reducing the possibility of another opening. Any water in the alarm line is automatically drained, further reducing the possibility of a false alarm due to a successive transient surge in supply pressure. 

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