Definition(s)
Regulator (Pressure)
A hydraulic device that reduces upstream supply pressure to a desired (regulated) pressure. Note: It may be manually or remotely operated and, once set, should maintain the regulated output pressure unless reset to a different pressure.
Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global Standards