Alarm Check Valve How It Works

The wet alarm valve is designed for applications where the water is unlikely to freeze.

Alarm check valve how it works. The function of the steam turbine protection system is often confused with the control system but in fact the two systems are entirely separate. Control valve positioner assembly. There are various types of check valves used in a wide variety of. Check valves are two port valves meaning they have two openings in the body one for fluid to enter and the other for fluid to leave.

A multi valve multi stage turbine protection system incorporates a mechanical. Control valve is also termed as the final control element. 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 system s activation or send a signal to a fire alarm control panel. Wet alarm valve system and equipment.

Either manually when a person activates a water gong or electronically. Control valves are valves used to control conditions such as flow pressure temperature and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a setpoint to a process variable whose value is provided by sensors that monitor changes in such conditions. The water staying pressurized in the pipes is released over the fire area after the sprinkler is activated. A swing check valve can act as an alarm check valve for a wet pipe fire sprinkler system but only when that valve can sound an alarm.

The protection system operates only when any of the control system set point parameters are exceeded and the steam turbine will be damaged if it continues to operate. Application areas warehouses factories hospitals shopping centers high buildings and residences. Trim piping around the check valve is used to activate an alarm which can be a mechanical or electrical device during a water flow condition. Wet alarm valves design for the over 4 c systems because it is weak against the freezing.

An alarm check valve can be activated or opened in one of two basic ways. Riser check valve assembly. A valve positioner consists of a very high gain amplifier this may be pneumatic electro pneumatic etc and a feed back link which detects the actual position of the valve. An alarm valve prevents a reverse flow of water from the installation into the fire pump room but in case a fire sprinkler is activated opened due to fire the alarm valve will open and permit.

Alarm check valve and flow meter detector use for the mechanical and electronical alarm detections.