Tag:valve=hollow_jet

valve = 
Description
Kind of valve design intended to spread a wide amount of fluid when opened as to avoid erosion issues downstream Show/edit corresponding data item.
Group: pipelines
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)
Requires
Useful combination
Status: approvedPage for proposal
More details at taginfo
Tools for this tag

A hollow jet valve is a particular kind of valve, pretty always installed on a duct outlet as to spread a high amount of fluid. This spread reduces any erosion damage downstream.

It requires outlet=valve as such valves will be always found at ducts' end. It always meets requirements for an actual outlet:

  • Significant amount of fluid is expected through this kind of valve (so significant it needs to be dispersed).
  • No ability to continue piping directly after the valve. The flow is dispersed on purpose as to not damage downstream environment.

Examples

Photo Location Tagging Comments
Hollow jet valves France

pipeline=valve
outlet=valve
valve=

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=

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