This standard provides requirements for the specification of self -contained electro-hydraulic linear and rotary valve actuators, both double acting and single acting, used for on-off/isolating, positioning, and continuous modulating duties. Self-contained electro-hydraulic actuation is defined as any actuator which:

a) Utilizes hydraulic fluid as the driving medium

b) Requires only electric power and a control signal to operate

c) Has its own dedicated electronic controller

d) Has its own dedicated hydraulic power unit (HPU)

Other requirements, or conditions of use, different from those indicated in this standard, shall be subject to negotiations between purchaser and the manufacturer/supplier, prior to order.