1、 AMERICAN NATIONAL STANDARD ANSI/ISA-96.06.01-2014 Guidelines for the Specification of Self Contained Electro-Hydraulic Valve Actuators Approved 10 September 2014 ANSI/ISA-96.06.01-2014 Guidelines for the Specification of Self Contained Electro-Hydraulic Valve Actuators ISBN: 978-0-876640-99-9 Copyr
2、ight 2014 by ISA. All rights reserved. Not for resale. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic mechanical, photocopying, recording, or otherwise), without the prior wr
3、itten permission of the Publisher. ISA 67 Alexander Drive P.O. Box 12277 Research Triangle Park, North Carolina 27709 - 3 - ANSI/ISA-96.06-01-2014 Preface This preface, as well as all footnotes and annexes, is included for information purposes and is not part of ANSI/ISA-96.06-01-2014. This document
4、 has been prepared as part of the service of ISA towards a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static but should be subject to periodic review. Toward this end, the Society welcomes all comments and criticisms and asks that they be add
5、ressed to the Secretary, Standards and Practices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 549-8411; Fax (919) 549-8288; E-mail: standardsisa.org. The ISA Standards and Practices Department is aware of the growing need for attention to the met
6、ric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards. The Department is further aware of the benefits to USA users of ISA standards of incorporating suitable references to the SI (and the metric system) in their bus
7、iness and professional dealings with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible. IEEE/ASTM SI 10, American National Standard for
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10、N WITH RESPECT TO THE EXISTENCE OR VALIDITY OF ANY PATENT RIGHTS ASSERTED IN CONNECTION WITH THIS DOCUMENT, AND ISA DISCLAIMS LIABILITY FOR THE INFRINGEMENT OF ANY PATENT RESULTING FROM THE USE OF THIS DOCUMENT. USERS ARE ADVISED THAT DETERMINATION OF THE VALIDITY OF ANY PATENT RIGHTS, AND THE RISK
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14、N CONNECTION WITH SUBMISSION OF A LETTER OF ASSURANCE, IF ANY, OR IN ANY LICENSING AGREEMENTS ARE REASONABLE OR NON-DISCRIMINATORY. ANSI/ISA-96.06-01-2014 - 4 - ISA REQUESTS THAT ANYONE REVIEWING THIS DOCUMENT WHO IS AWARE OF ANY PATENTS THAT MAY IMPACT IMPLEMENTATION OF THE DOCUMENT NOTIFY THE ISA
15、STANDARDS AND PRACTICES DEPARTMENT OF THE PATENT AND ITS OWNER. ADDITIONALLY, THE USE OF THIS DOCUMENT MAY INVOLVE HAZARDOUS MATERIALS, OPERATIONS OR EQUIPMENT. THE DOCUMENT CANNOT ANTICIPATE ALL POSSIBLE APPLICATIONS OR ADDRESS ALL POSSIBLE SAFETY ISSUES ASSOCIATED WITH USE IN HAZARDOUS CONDITIONS.
16、 THE USER OF THIS DOCUMENT MUST EXERCISE SOUND PROFESSIONAL JUDGMENT CONCERNING ITS USE AND APPLICABILITY UNDER THE USERS PARTICULAR CIRCUMSTANCES. THE USER MUST ALSO CONSIDER THE APPLICABILITY OF ANY GOVERNMENTAL REGULATORY LIMITATIONS AND ESTABLISHED SAFETY AND HEALTH PRACTICES BEFORE IMPLEMENTING
17、 THIS DOCUMENT. THE USER OF THIS DOCUMENT SHOULD BE AWARE THAT THIS DOCUMENT MAY BE IMPACTED BY ELECTRONIC SECURITY ISSUES. THE COMMITTEE HAS NOT YET ADDRESSED THE POTENTIAL ISSUES IN THIS VERSION. The following people served as members of ISA96.06. NAME COMPANY K. Enos, Chair Rexa, Inc. W. Weidman,
18、 Managing Director WCW Consulting V. Mezzano Fluor Corp. A. Michelson Sunbelt Supply S. Samy CCI J. Rosa* Rotork Controls F. Washburn* Rotork Controls W. Stinson Stinson Valve-Actuation LLC J. Young The Dow Chemical Company _ * One vote per company. The following people served as members of ISA96. N
19、AME COMPANY V. Mezzano, Chair Fluor Corp. W. Weidman, Managing Director WCW Consulting M. Bober Copes-Vulcan S. Boyle Metso Automation USA Inc. K. Enos Rexa, Inc. E. Holtgraver QTRCO Inc. D. Leese Automation Technology Inc. (ATI) G. Liu Consultant S. Meunier Velan A. Michelson Sunbelt Supply D. Payn
20、e Tyco Flow Control S. Richardson Kinetrol USA Inc. S. Samy CCI F. Washburn Rotork Controls L. Winkel Flowserve J. Young The Dow Chemical Company - 5 - ANSI/ISA-96.06-01-2014 This document was approved for publication by the ISA Standards and Practices Board on 2. NAME AFFILIATION E. Cosman, Vice Pr
21、esident The Dow Chemical Company D. Bartusiak ExxonMobil Chemical Co. P. Brett Honeywell Inc. J. Campbell Consultant B. Dumortier Schneider Electric D. Dunn Consultant J. Federlein Federlein release of hydraulic pressure allows a spring to drive the actuator in the return direction. See Figure 2. c)
22、 Motor pressure driven An electric motor driven pump displaces fluid and electrically controlled hydraulic valves are used to control the direction of the fluid flow and subsequent actuator direction. See Figure 3. d) Accumulator pressure driven An electric motor driven pump displaces fluid to charg
23、e an accumulator system and electrically controlled hydraulic valves are used to direct fluid from the accumulator system to drive directional actuator motion. Some actuators use accumulators to achieve the specified fail-safe position only, electrically controlled hydraulic valves in these systems
24、divert fluid in a single direction. See Figure 4. Figures 1 through 4 allow any type of linear or rotary cylinder and show prime hydraulic source details only. Valve types, reliefs and reservoir details are not shown. - 13 - ANSI/ISA-96.06-01-2014 4.2 Types of motion Within the four design types the
25、re are two types of actuator motion: a) Linear Provides linear motion through the use of either a single or double rod (through rod) hydraulic cylinder. b) Rotary Provides rotary motion through the use of a hydraulic cylinder(s) driving a scotch yoke, rack and pinion, or clevis and arm mechanism. 5
26、User defined requirements These items are required to properly specify an electro-hydraulic valve actuator. If these items are not specifically covered in the specification and/or purchasing documents for the actuator, the actuator manufacturers standards will apply and shall be listed on the actuat
27、or manufacturers datasheet. 5.1 Ambient conditions 5.1.1 Temperature User shall specify the ambient temperature range for the installation. The ambient temperature range for electro-hydraulic actuators is typically from -4F to +104F (-20C to +40C). Severe environments such as arctic, desert, marine,
28、 tropical and applications such as those in close proximity to heat sources may require special considerations. With the flexibility of electro-hydraulics it is possible to configure these actuators to operate in extreme temperature ranges (e.g., -48F to +300F / -44C to 149C). 5.1.2 Hazardous area c
29、lassification If required, the user shall specify the need for explosion proof equipment in accordance with the country of use (i.e., INMETRO, CSA, NEC, IECEx, ATEX, etc.). The user shall recognize that some electro-hydraulic actuator assemblies are comprised of individually certified components for
30、 use in hazardous areas. The suitability for use in hazardous areas is also dependent on how components are integrated together. For these actuator assemblies, the user may want to consider a 3rd party certification, before use in a hazardous area, to validate compliance. ANSI/ISA-96.06-01-2014 - 14
31、 - 5.1.3 Ingress protection - Electrical User may specify the required ingress protection from either the International Electrotechnical Commission (IEC) 60529 Standard or the National Electrical Manufacturers Association (NEMA) Standard Number 250. Unless otherwise stated, actuators designed to the
32、 electro-hydraulic actuator standard shall meet, as a minimum, NEMA 4 and IEC - IP56. 5.1.3.1 Electrical enclosure materials Numerous materials are available for standalone electrical enclosures and the user may specify a material based on their own requirements. If not specified, the manufacturers
33、standard materials shall be used. Typical enclosure materials may include but not limited to: a) Painted carbon steel Excellent enclosure strength and nominal corrosion protection. b) Non-metallic Excellent corrosion protection with reduced box strength. c) 303 and 304 Stainless steel Good corrosion
34、 protection, excellent enclosure strength. d) Aluminum Good corrosion protection, excellent enclosure strength. e) 316 Stainless steel Excellent corrosion protection, excellent enclosure strength. 5.1.4 Ingress protection Reservoir User may specify either a non-isolated or an isolated oil reservoir
35、system as defined in section 6.8.2. The specification of an isolated reservoir system provides the maximum protection against oil contamination and should be considered for harsh environments where dust, humidity and contamination levels are high. Improving the protection against reservoir contamina
36、tion will reduce system maintenance, downtime, waste disposal costs and extend filtration life. 5.2 Performance requirements 5.2.1 Output User shall specify the required torque / thrust at the following points (if available, including all safety factors): BTO-Break to open RTO-Run to open ETO-End to
37、 open BTC-Break to close RTC-Run to close ETC-End to close Torque / Thrust Limit (Valve MAST) - 15 - ANSI/ISA-96.06-01-2014 5.2.2 Travel User shall specify the stroke length / rotation angle. Included in this specification shall be consideration for over travel in the actuator to account for variati
38、ons in the mounting hardware, valve internals or lost motion in the valve coupling. 5.2.3 Operating time User may specify the cycle or stroke time. When the cycle or stroke time is not specified, the times shall be provided as 10-12 inches of linear stroke per minute or 5 seconds per inch of valve b
39、ore (part turn). To detail the speed requirements the following nomenclature shall be used: a) Opening Speed Total travel time from input signal change measured across the actuators input for the actuator to travel from a full closed position to ninety five percent of the full open position. b) Clos
40、ing Speed Total travel time from input signal change measured across the actuators input for the actuator to travel from a full open position to ninety five percent of the full closed position. c) Fail Safe / ESD (Emergency Shut Down) / Trip Speed Total travel time from a qualifying event to achieve
41、 the fail safe position. 5.3 Valve details User shall specify the valve closing direction as follows: a) Rotary Clockwise (CW) or Counter-Clockwise (CCW) (when looking down on valve stem) b) Linear Extend or retract User shall specify the installed valve stem orientation (vertical or horizontal). Us
42、er may provide the following valve information which will allow the actuator manufacturer to better understand the actuation requirements: a) Valve type b) Valve manufacturer c) Valve model d) Valve size e) Valve class 5.4 Fail-safe User shall specify the fail-safe position and conditions; if not sp
43、ecified, the electro-hydraulic actuator will fail in last position. 5.4.1 Fail-safe positions Common fail-safe positions available: a) Fail in last position (Lock in last/current position) ANSI/ISA-96.06-01-2014 - 16 - b) Fail open (Drive to the full open position) c) Fail closed (Drive to the full
44、closed position) d) Fail to user specified position 5.4.2 Fail-safe conditions Condition specification shall include active or passive state and the levels which define the event. a) Loss of analog control signal b) Loss of digital communication c) ESD / trip signal d) Loss of the electrical power s
45、upply e) Loss of hydraulic pressure 5.5 Controls User shall specify the method or combination of methods used to control the actuator. This section defines the available methods for control. 5.5.1 Local control capabilities When specified, a local pushbutton/control station shall be provided with a
46、local-remote switch and open-close push buttons. 5.5.2 Remote/Network control Actuators electronic controller shall be provided with an integrally mounted device to receive an analog or digital signal, to define the actuators set point. The user shall specify the control type as follows. 5.5.3 Analo
47、g control Actuators shall be position based on an incoming control signal of 4-20mA and will be able to accept a range of 3mA to 22mA, as measured at the actuators input. 5.5.4 Digital communication Actuators shall be provided with an integrally-mounted device providing connectivity with the host co
48、ntrol system for actuator control, position feedback and status indication. The control device shall meet the appropriate recognized protocol or BUS system standards and shall be certified by the appropriate organization. Typical protocols/buses include: a) Foundation Fieldbus b) HART c) PROFI-Net d
49、) PROFI-Bus e) Device Net f) Modbus g) Ethernet/IP - 17 - ANSI/ISA-96.06-01-2014 Additional diagnostic and data collection may be provided upon request and should be agreed upon between the user and the actuator supplier, and included in the order specification. 5.5.5 Pulse control Actuators shall open or close the valve based on a wet or dry contact input signal. a) Active pulses shall be in the range of 22V to 120V, AC or DC. b) No pulse is defined as 0V to 8V, AC or DC. 5.5.6 Discrete control Actuators shall open, close, or st
