Which types of dry pipe valves are commonly recognized?

The commonly recognized types of dry pipe valves include differential, mechanical, and low differential valves.

Differential dry pipe valves operate based on the difference in pressure between the air pressure inside the system and the water supply pressure. This design allows for the quick release of water into the system once the air pressure drops due to an activation triggering the sprinkler heads.

Mechanical dry pipe valves function based on a mechanical latch or linkage system that opens the valve when a predetermined pressure is reached. This type of valve is reliable and effective in ensuring efficient water delivery in dry pipe sprinkler systems.

Low differential valves are designed to operate effectively with a smaller pressure differential and are particularly useful in applications where the water supply pressure is lower, allowing for reliable performance across a wider range of system pressures.

Recognizing these specific types helps ensure proper installation, maintenance, and application based on the requirements of the fire protection system being employed. The other options listed do not correspond with standard classifications recognized in the industry for dry pipe valves.