This document provides basic requirements for electric valve actuators, used for on-off and control valves. It includes guidelines for classification, design, enclosure and corrosion protection, and methods for conformity assessment. Combinations of electric actuators and gearboxes when supplied by the actuator manufacturer are within the scope of this document. This document does not cover solenoid actuators, electro-hydraulic actuators and electric actuators which are integral to the valves. Other requirements or conditions of use different from those indicated in this document are agreed between the purchaser and the manufacturer/supplier, prior to order.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification — Designation
4.1 General
4.2 Type
4.3 Actuator duty classification
4.4 Action on loss of external electric power
5 Design requirements
5.1 Endurance
5.2 Environmental conditions
5.3 Actuator attachment
5.4 Primary closing direction
5.5 Fail-safe direction
5.6 Electrical connections — Cable entries
5.7 Self-locking/braking
5.8 Performance
5.9 Basic design requirements
6 Optional equipment
6.1 General
6.2 Anti-condensation heater
6.3 Position transmitter
6.4 Actuator running transmitter
6.5 Additional position and/or torque signalling
6.6 Local control station
6.7 Local position indication
6.8 Actuator electrical controls
7 Type and production test
7.1 General
7.2 Type tests
7.3 Control of production process
8 Marking
8.1 General
8.2 Mandatory marking
8.3 Optional marking
9 Documentation
9.1 General
9.2 Mandatory documentation
9.3 Optional documentation
10 Packaging
Annex A Endurance test procedure (normative)
Annex B Actuator selection guidelines (informative)