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Dry sprinkler valve - Gate valves vs ball valves - Drain solenoid valve Dry Sprinkler Valve
Dry Pipe Valve Here is an example of a dry pipe valve. Some areas cannot be safely protected by a wet pipe sprinkler system because of freezing or other hazards, such as a parking garage. The dry system provides an interface between the water and dry side of the system. The sprinkler pipes in the garage are pressurized with air. When a sprinkler head is activated, the pressure drop allows the water to enter the dry pipes and hopefully put out the fire. The water has maximum of 60 seconds to discharge from the sprinkler. If the water cannot discharge in that amount of time, an exhauster may be used, if approved, to get rid of the extra air in the pipes. Dry Pipe System
This is part of what is called a dry pipe fire sprinkler system riser. It separates the water-filled pipes from the non water-filled pipes. It is used in places subject to freezing temperatures (in this case a parking garage). Note the seismic bracing at the top of the photo. Also note the galvanized, shiny silver pipe, which is used to prevent water corrosion. A pressure reducing valve (PRV) is on the left. gate valve 3d resilient seated gate valves concentric butterfly valve steam water mixing valve daniel piston check valve float valve balls rupture pin relief valve application of gate valve |