tørrledningsventilen

The tørrledningsventil, often translated as a dry pipe valve, is a critical component in certain types of fire suppression systems. Its primary function is to maintain a low-pressure air or nitrogen supply within the sprinkler piping network until a fire event causes a sprinkler head to activate. This separation of air and water is the defining characteristic of a dry pipe system, making the tørrledningsventil essential for its operation.

In a typical dry pipe system, the tørrledningsventil is located between the main water supply and the sprinkler piping. Air under pressure is held back by the valve, preventing water from entering the system. When a fire occurs, the heat causes a sprinkler head to open. This releases the pressurized air from the piping, which in turn reduces the pressure on the tørrledningsventil. The increased pressure differential across the valve then forces it open, allowing water to flow into the sprinkler pipes and extinguish the fire.

The tørrledningsventil is designed with a diaphragm or clapper that is held in place by the air pressure. When this pressure drops significantly, the water pressure is able to overcome the air pressure and open the valve. This mechanism ensures a delay in water delivery compared to wet pipe systems, which is a trade-off for the ability to protect areas subject to freezing temperatures. The specific design and operation can vary between different manufacturers and models of tørrledningsventil.