Alarm check valve

Once the alarm check valves are activate they will allow water to flow through the system, engaging the sprinkler system as and where needed in order to suppress a potential fire. It serves a dual purpose which prevents a reverse flow of water (non-return), also provides for the use of the water motor gong. Alarm Check Valve is core element in wet pipe fire sprinkler systems. Meanwhile, in the event of variable pressure condition, false alarm is prevented with provision of retard chamber at the external bypass. 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.

Alarm check valves shall be cast iron construction.

All operational internal components shall be manufactured from corrosion-resistant alloys. Documents and Resources Technical Data Sheets. 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 water flow into the system. Why use alarm check valves in a sprinkler system? What pressure is needed to open a check valve?

What are the parts of a check valve? How do I check PCV valve? Pro Grade Irrigation Supplies.

An alarm check valve consists of a spring, valve clapper, and alarm port. They primarily serve a dual purpose in that they prevent a reverse flow of water through their bodies (non-return) and also pro-vide for the use of a hydraulic fire alarm which is not dependent upon an electrical power supply for its operation. Reliable is one of the world’s largest producers of automatic fire sprinklers and sprinkler system control equipment.

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 water-way clapper. Inspector test valve can be located anywhere after the waterflow detector. Some contractors install then at the most remote location of a sprinkler system. Alarm Valves HD alarm valves act as a check valves by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping. The valve is trimmed with a water bypass line, which has an in-line swing check valve.

Download Revit Lookup Table. Victaulic-FP- Check Valve Body. Refer to the specific trim diagrams included with the shipment. Install an uninterrupted alarm pressure switch when a Series 7Water Motor Alarm is used.

If the floor area of any of the floor exceeds 50sf, you need to consider additional ACV. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The valve shoul (if properly maintained), help hold the system pressure steady and reduce the possibility of false alarms.

A small portion of the water flow to the sprinklers is diverted through an auxilliary outlet port to a water motor that activates the alarm. Low Prices - Huge PVC Warehouse.