From OpenStreetMap Wiki
Jump to navigation Jump to search
Public-images-osm logo.svg actuator = hydraulic_cylinder
Hydroelectric ball valve hydraulic actuator.jpg
A hydraulic cylinder changes the state of a machine or device Show/edit corresponding data item.
Group: mechanics
Used on these elements
may be used on nodesmay be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
Useful combination
Status: approvedPage for proposal

A hydraulic cylinder is a linear mechanical actuator designed to deliver unidirectional force to a moving part of a system. It runs with a not compressible liquid fluid like oil instead of pneumatic cylinders (actuator=pneumatic_cylinder) which make use of compressed air.

This key was initially proposed to describe pipeline=valve but it is suitable for movable road bollards, automatic doors or any moving system also.