NZQA Expiring unit standard
2725 version 7
Page 1 of 3
Title
Design a hydraulic power system under supervision
Level
3
Credits
15
Purpose
People credited with this unit standard are able to, under
supervision, prepare to design a hydraulic power system, and
design a hydraulic power system.
Classification
Mechanical Engineering > Fluid Power - Hydraulics
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Unit 17345, Draw a diagram, and explain the operating
principles, of a simple hydraulic power system, or demonstrate
equivalent knowledge and skills.
Explanatory notes
1
The hydraulic power system designed for this unit standard is to be of a simple open
circuit variety that includes the use of the following range of components:
a Fixed displacement pump(s), which may include but are not limited to gear,
screw, and vane.
b Fluid conditioning equipment, which may include but is not limited to the following
filter types - suction, pressure line, and/or return line.
c Pressure control valves, which may include but are not limited to relief, reducing,
and/or sequence (pilot operated and/or direct acting).
d Conventional, directional spool valves (pilot operated and/or direct acting).
e Flow control valves, which may include but are not limited to compensated and
non-compensated types.
f Non-return valve(s).
g Hydraulic motor(s) and/or hydraulic cylinder(s) (single or double acting).
h Auxiliary components, which may include but are not limited to accumulators and
heat exchangers.
i Fluid conductors (pipes/hoses/couplings) and gauges.
2
The design and specification of the hydraulic power system is the outcome of this
unit standard. The actual construction of the system is not a requirement of
assessment.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
2725 version 7
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Prepare to design a hydraulic power system.
Evidence requirements
1.1
Design specifications and operational requirements are understood and
confirmed with supervisor.
Range
1.2
Components in the specification are explained in terms of their working
principles.
Range
1.3
may include but is not limited to - spool configuration, reservoir
design, relationship and placement within the system.
Reference is made to hose charts for line size relative to flow rate.
Range
1.4
may include but is not limited to - travel speeds, lift, weight, force.
hard copy, electronic.
Design safety and regulatory requirements are identified and confirmed with
supervisor.
Outcome 2
Design a hydraulic power system.
Evidence requirements
2.1
Calculations are made to meet operational requirements of system and
determine sizing of components to meet design specification.
Range
may include but is not limited to - area, pressure, force, flow, line
size.
2.2
Terminology and symbols are selected to match specification.
2.3
Design meets specification and operational capabilities.
2.4
Design and operational capabilities meet safety and regulatory requirements.
2.5
Fluid types for use within the system are identified.
2.6
Documentation meets circuit specifications and operational requirements.
Range
Competenz
SSB Code 8104
to include - components list, schematic (graphic symbol) diagram;
may include but is not limited to - recommended start up and
shutdown procedures, description of operation and safety
information, maintenance schedule, consumables information.
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
2725 version 7
Page 3 of 3
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
17 January 1995
31 December 2015
Revision
2
14 April 1997
31 December 2015
Revision
3
5 January 1999
31 December 2015
Revision
4
23 May 2001
31 December 2015
Review
5
25 May 2004
31 December 2015
Review
6
18 March 2011
31 December 2017
Rollover
7
15 October 2015
31 December 2017
Consent and Moderation Requirements (CMR) reference
0013
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, or
an inter-institutional body with delegated authority for quality assurance, 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.
Consent requirements and an outline of the moderation system that applies to this
standard are outlined in the 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.
Competenz
SSB Code 8104
 New Zealand Qualifications Authority 2016