Tag:outlet=valve

From OpenStreetMap Wiki
Jump to navigation Jump to search
Public-images-osm logo.svg outlet = valve
Howell-Bunger valve.jpg
Description
A valve, including sluice gates, control the flow of a pipe, tunnel or canal outlet Show/edit corresponding data item.
Group: man made
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations (except multipolygon relations)
Useful combination
Status: approvedPage for proposal

A valve controls the fluid flowing through a given outlet.

It includes gate, hollow_jet, check or butterfly

It can be combined with man_made=outfall sometimes.

Examples

Culverts or tunnels

Photo Location Tagging Comments
Sluice gate outlet USA

outlet=valve
valve=gate

A gate is controlling flow through an outlet of a discharge tunnel of Hoover Dam. See it closed below

"Stoney gate at outlet portal of diversion tunnel No. 2 lowered during test." - NARA - 293841.tif

Pipelines

None of these situations indicates the water reach a water body, so no combination with man_made=outfall is made.

Photo Location Tagging Comments
Hollow jet valves France

pipeline=valve
outlet=valve
valve=hollow_jet

A special kind of pipeline outlet with valves spreading a dense flow of water on a wide area as to reduce downstream damage or erosion


You usually find them on large dams

Howell-Bunger valve USA

pipeline=valve
outlet=valve
valve=hollow_jet

A hollow jet valve provided by Howell-Bunger in operation downstream of a dam
Needle valve USA

pipeline=valve
outlet=valve
valve=needle

A needle valve could also be used to mitigate impact of pressurised output water, here at the bottom of a dam
Flap valve as a flood protection -

pipeline=valve
outlet=valve
valve=check

Such a protection, sometimes called a flap valve, prevents downstream floodwater to get in the underground drain. The flapper of the check valve only moves when upstream flow comes at enough level to raise the movable gate.