An Alarm Check Valve (ACV) is a specialized valve used in fire protection systems. It combines the functions of a check valve and an alarm valve to ensure the efficient and reliable operation of fire protection piping. Flange type ACVs have certain features that make them suitable for specific applications. Here are some key features of Alarm Check Valve – Flange Type:
Flange Connection: The ACV has flanged ends that allow it to be securely connected to the fire protection system’s piping. Flanges provide a strong and leak-proof connection between the valve and the pipes, ensuring reliable performance.
Check Valve Function: The ACV includes a check valve mechanism that allows the flow of water in only one direction. It prevents backflow, ensuring that water flows only from the supply side to the downstream system.
Alarm Activation: The ACV incorporates an alarm trim assembly that activates an alarm signal when the valve opens due to water flow. This alarm notifies occupants or monitoring personnel of a potential fire situation, allowing for prompt response and action.
Water Flow Monitoring: The alarm trim assembly also includes a water motor gong or a pressure switch that detects the flow of water and activates the alarm. This provides an audible or visual indication of water flow in the system, helping identify the presence of fire or other system-related issues.
Pressure Relief: Flange type ACVs may have a pressure relief mechanism to relieve excess pressure from the system, preventing damage to the pipes or other components in case of pressure surges.
Pressure and Flow Ratings: ACVs have specific pressure and flow ratings, which indicate the maximum pressure and flow capacity they can handle. These ratings ensure that the valve is suitable for the specific fire protection system it is installed in.
Compliance with Standards: Flange type ACVs should be designed and manufactured in compliance with relevant industry standards, such as those established by the National Fire Protection Association (NFPA), the Underwriters Laboratories (UL), or other regulatory bodies. Compliance ensures the valve meets necessary safety and performance requirements
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