Fire hydrants
A fire hydrant is a device that sprays semi-solid, liquid or gas flow in only one direction. Fire hydrants are used in various systems, from home plumbing to large buildings. Poppet valves are often used to manage the flow of water and extinguishing agents and rely solely on changes in water or extinguishing agent pressure.
For example, any fire sprinkler system needs a reliable source of water for immediate use in a fire emergency. Most fire sprinkler systems use a combination of city water sources and fire service connections to supply water to the sprinkler heads. Although multiple water sources provide greater reliability for fire protection systems, they can also be problematic. Drinking water may be contaminated by water from fire hoses, or dirty water from fire hoses may flow into nearby streets.
These valves prevent the occurrence of this unwanted reverse flow of water, which is known as backflow, to protect against fire. Many fire hydrants have a spring-loaded hinged clapper that holds the valve closed until the water supply is turned on. These clappers only open in one direction: when these flows reverse (or nearly stop), the spring pushes the clapper against a rubber object, forming a watertight seal.
“1 – “1/2 1 – “2 – “2.5 – “4
Flake faucet “1/2” has two models, small source or (650 grams) and large source or (900 grams).
Gas valve or Hoserail box valve
“3/4 brass and aluminum – high and normal pressure
