NZQA registered unit standard
Title
2639 version 6
Page 1 of 3
Maintain and service control valves in accordance with industry requirements
4 Credits 10 Level
Purpose People credited with this unit standard are able to:

maintain and service control valves in accordance with industry requirements.
Classification Industrial Measurement and Control > Industrial Measurement and Control - Maintenance
Available grade
Entry information
Achieved
Recommended skills and knowledge
The Skills Organisation
SSB Code 100401
Recommended: Unit 2638, Demonstrate knowledge of control valves, actuators, and positioners , or demonstrate equivalent knowledge and skills.
Explanatory notes
1 This unit standard has been developed for learning and assessment in a workplace environment.
2 Can include self actuating valves.
For valve actuators and positioners refer to Unit 2640, actuators and positioners.
Maintain control valve
3 References
ANSI/ISA-75.05.01-2000 (R2005) Control Valve Terminology ;
Electricity Act 1992;
Electricity (Safety) Regulations 2010;
Health and Safety in Employment Act 1992 and associated regulations;
ISSN 0114-0663, New Zealand Electrical Codes of Practice, available from Energy
Safety, http://www.med.govt.nz/energysafety/legislation-policy/electricity-actsregulations-codes/standards-and-codes-of-practice/new-zealand-electrical-codes-ofpractice ; and all subsequent amendments and replacements.
4 Definitions
Industry requirements – includes all asset owner requirements, manufacturers’ specifications; and enterprise requirements which cover the documented workplace policies, procedures, specifications, business requirements; and quality management requirements relevant to the workplace in which the assessment is carried out.
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New Zealand Qualifications Authority 2020

NZQA registered unit standard 2639 version 6
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Maintain – planned activity during normal operation, to conserve or keep an item or piece of equipment in a state of repair and to ensure that this is done in a sustainable way.
PPE – Personal Protection Equipment – that is appropriate to any job being undertaken and can include overalls, safety glasses, gloves, face masks, safety boots, ear muffs etc.
Service
– planned activity during normal operation, that involves, inspection, cleaning, testing, adjusting or making minor repairs to a piece of equipment to ensure that it works properly.
Outcome 1
Maintain and service control valves in accordance with industry requirements.
Evidence requirements
Locate, interpret, and apply technical information for servicing equipment. 1.1
1.2 Identify and explain types and causes of control valve damage.
Range may include but not limited to
– seat damage, stem, damage, gland damage, erosion, corrosion, cavitation, flashing.
1.3 Explain and follow safe work procedures.
Range may include but not limited to – isolation, chemical (oxygen/oil), pressure, process liquid, process gas, PPE.
1.4 Complete servicing of control valves and verify performance to ensure continued operation.
Range may include but not limited to – tools, materials, parts, techniques
(including testing), specifications; valve types
– single seated globe, double seated globe, butterfly, ball, eccentric rotary plug, self-actuating.
Evidence of two valve types required.
1.5 Produce service reports in accordance with industry requirements.
Planned review date 31 December 2017
The Skills Organisation
SSB Code 100401

New Zealand Qualifications Authority 2020

NZQA registered unit standard 2639 version 6
Page 3 of 3
Status information and last date for assessment for superseded versions
Process Version Date Last Date for Assessment
Registration
Revision
1
2
31 October 1995
30 October 1997
31 December 2013
31 December 2013
Revision
Review
3
4
3 April 2001
22 June 2001
31 December 2013
31 December 2013
Review 5 19 May 2008 31 December 2019
Review 6 21 November 2013 N/A
Consent and Moderation Requirements (CMR) reference 0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do
.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMRs). The
CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact The Skills Organisation at reviewcomments@skills.org.nz
if you wish to suggest changes to the content of this unit standard.
The Skills Organisation
SSB Code 100401

New Zealand Qualifications Authority 2020