SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Service and maintain irrigation control valves 
SAQA US ID UNIT STANDARD TITLE
335975  Service and maintain irrigation control valves 
ORIGINATOR
SGB Ornamental Horticulture and Landscape 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 01 - Agriculture and Nature Conservation Horticulture 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
A person credited with this unit standard will be able to:
  • Identify the defective components in isolation valves and replace these.
  • Conduct fault finding on hydraulic control valves and replace the defective components.
  • Test the electrical supply to solenoid control valves and conduct fault finding on the mechanical components on these valves.
  • Test, strip and repair pressure control valves. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    Learners accessing this qualification will have demonstrated competence in:
  • It is assumed that learners are competent in Communication and Mathematical Literacy at NQF Level 2 or equivalent. 

  • UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Strip and replace worn or defective parts on irrigation isolation valves. 
    OUTCOME RANGE 
    The range includes but is not limited to:
  • Gate valves, ball cocks, stopcocks, diaphragm/globe valves, butterfly valves, and SOPs (Standard Operating Procedures). 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The renewal and adjustment of the gland packing for a flanged gate valve are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 2 
    The renewal and adjustment of the gland seals for stop cocks and screwed gate valves are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 3 
    The techniques for replacing the diaphragm in a globe valve are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 4 
    The techniques for replacing the Teflon seat in a ball cock are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 5 
    The renewal and reseating of the elliptical seal of a butterfly valve is demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    SPECIFIC OUTCOME 2 
    Strip and replace worn or defective parts on direction control and air release valves. 
    OUTCOME RANGE 
    The range includes but is not limited to:
  • Swing NRV (Non Return Valves), piston NRV, wafer NRV, foot valve, air release valves, and vacuum breaker. 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The techniques for replacing the seal and swivel assembly of a swing NRV are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 2 
    The techniques for replacing the plunger and seal of a piston NRV are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    ASSESSMENT CRITERION 3 
    The renewal and reseating of a wafer NRV's seal are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    ASSESSMENT CRITERION 4 
    The techniques for replacing the conical seal and slide assembly of a flanged foot valve are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    ASSESSMENT CRITERION 5 
    The methods of testing a NRV or foot valve for a positive seal are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 6 
    The techniques for testing and replacing the seals of air release and vacuum breaker valves are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    SPECIFIC OUTCOME 3 
    Identify the various malfunctions that may occur in the operation of a hydraulic valve and the methods of remedying these. 
    OUTCOME RANGE 
    The range includes but is not limited to principles of operation, remote control, non closure, will not open, pressure testing, and repair techniques. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The principles of operation that are used to control a hydraulic valve are explained in the context of the mechanical advantage that the diaphragm's chamber has over the seat. 

    ASSESSMENT CRITERION 2 
    The methods of achieving the remote control of a hydraulic are described in terms of the capillary tubing and hydraulic controller's functions. 

    ASSESSMENT CRITERION 3 
    The reasons for a hydraulic valve remaining open are explained and the methods of testing and confirming the source of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 4 
    The reasons why a hydraulic valve may not open are explained and the methods of testing and confirming the source of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 5 
    The methods of confirming the controller and valve's operating pressures are demonstrated and the effects that a pressure differential will have on the operation of a valve are described in terms of its closing speed. 

    ASSESSMENT CRITERION 6 
    The techniques for stripping, inspecting and replacing a hydraulic valve's components are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    SPECIFIC OUTCOME 4 
    Identify the various malfunctions that may occur in the operation of a solenoid valve and the methods of remedying these. 
    OUTCOME RANGE 
    The range includes but is not limited to:
  • Principles of operation, valve opening criteria, valve closing criteria, maintain correct voltage, valve not opening, non closure, electrical continuity, 24 volt battery pack, and component replacement. 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The principles of operation that are used to achieve closure of a solenoid valve are explained in the context of the mechanical advantage that the diaphragm's chamber has over the seat. 

    ASSESSMENT CRITERION 2 
    The role that the solenoid plays in opening the valve is described in terms of the pilot control of the pressure in the diaphragm chamber. 

    ASSESSMENT CRITERION 3 
    The importance of maintaining the rated voltage to the solenoid's coil is explained in respect of the effects that low voltage will have on the operation and life of the coil. 

    ASSESSMENT CRITERION 4 
    The reasons why a solenoid valve may remain closed are explained and the methods of testing and confirming the sources of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 5 
    The reasons why a solenoid valve may not close are explained and the methods of testing and confirming the sources of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 6 
    The methods of testing the electrical continuity of a solenoid coil are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 7 
    The methods of testing the operation of a solenoid coil with a 24 volt battery pack are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 8 
    The techniques for stripping, inspecting and replacing a solenoid valve's components are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    SPECIFIC OUTCOME 5 
    Strip and replace worn or defective parts on pressure control valves. 
    OUTCOME RANGE 
    The range includes but is not limited to direct acting pressure relief valves, pilot operated pressure relief valves, direct acting pressure reducing valves, pilot operated pressure reducing valves (PRV), and pressure sustaining valves. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The signs that indicate that a direct acting pressure relief valve requires servicing are described and the techniques for stripping and replacing the defective/worn components are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    ASSESSMENT CRITERION 2 
    The reasons why a pilot operated pressure relief valve may not open or close on command are explained and the methods of testing and confirming the sources of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 3 
    The methods of testing and confirming the correct operation of a direct acting PRV are demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 4 
    The techniques for stripping, inspecting and replacing a PRV's components are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    ASSESSMENT CRITERION 5 
    The reasons why a pilot operated PRV may not regulate the down stream pressure are explained and the methods of testing and confirming the sources of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 6 
    The reasons for a pressure sustaining valve not holding the up stream pressure are explained and the methods of testing and confirming the sources of these malfunctions are demonstrated in accordance with the manufacturer's fault finding procedures. 

    ASSESSMENT CRITERION 7 
    The techniques for stripping, inspecting and replacing a pilot operated pressure control valve's components are demonstrated in accordance with the manufacturer's guidelines and the company's standard operating procedures. 

    SPECIFIC OUTCOME 6 
    Complete all necessary documentation. 
    OUTCOME RANGE 
    The range includes but is not limited to:
  • Importance of documentation, completion of servicing job card, impact of incorrect data. 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The necessity of noting all the materials used and the time involved in the maintenance of control valves is explained with respect to allocating the costs for the service. 

    ASSESSMENT CRITERION 2 
    The completion of the job card at the end of the service is demonstrated in accordance with the company's standard operating procedures. 

    ASSESSMENT CRITERION 3 
    The consequences of incomplete documentation are explained in terms of the impact this will have on the finances and stock replenishment for the business/company. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor or moderator respectively with the relevant Education and Training Quality Assurance Body (ETQA), or with another ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA, or with another ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant ETQA, or by another ETQA that has a Memorandum of Understanding with the relevant ETQA, according to the ETQA's policies and guidelines for assessment and moderation.
  • Moderation must include both internal (provider-based) and external (ETQA-based) moderation of assessment, unless ETQA policies specify otherwise.
  • Assessment and moderation of assessment against this unit standard should encompass achievement of competencies described in the individual unit standard and may encompass achievement of integrated competencies with other unit standard(s).
  • Anyone wishing to be assessed against this unit standard may apply to be assessed by any assessment agency, assessor or provider institution that is accredited by the relevant ETQA. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    N/A 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    The learner is able to identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made by:
  • Applying the operating principles of a hydraulic valve to conduct trouble shooting. 

  • UNIT STANDARD CCFO WORKING 
    The learner is able to work effectively with others as a member of a team, group, organisation or communities by:
  • Working with others in testing for any pressure differential between the controller and the hydraulic valves. 

  • UNIT STANDARD CCFO ORGANISING 
    The learner is able to organise and manage oneself and one's activities responsibly and effectively by:
  • Following the fault finding procedures to ascertain the components that may cause a malfunction of a remote control valve. 

  • UNIT STANDARD CCFO COLLECTING 
    The learner is able to collect, organise and critically evaluate information by:
  • Utilising the various manufacturer's maintenance manuals to conduct fault finding on valves. 

  • UNIT STANDARD CCFO COMMUNICATING 
    The learner is able to communicate effectively using visual, mathematical and/or language skills in the modes of oral and/or written presentation by:
  • Reporting on the presence of a high proportion of dirt or debris that has caused the valves to malfunction. 

  • UNIT STANDARD CCFO SCIENCE 
    The learner is able to use science and technology effectively and critically, showing responsibility towards the environment and health of others by:
  • Understanding the operating principles of electro magnetism to conduct trouble shooting of solenoid valves. 

  • UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    The Learner:
  • Is expected to perform the specific outcomes reflected in this unit standard without direct supervision.
  • Should have access to work site procedures.
  • Should demonstrate an application of ethics and values.
  • Must apply basic principles of general safety and customer care.
  • Should demonstrate an awareness of the expectations and obligations of basic employee/employer relations including industrial relations principles.

    At this level the communication/reporting of issues arising in the workplace, is embedded in the specific outcomes and the related assessment criteria.

    It is understood that, due to the nature of the work environment and the skills level of the Learner, that the aspects of teamwork form an integral part of the necessary specific outcomes and related assessment criteria.

    The points included under the notes, should be included when the qualifying Learners are being assessed. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  73109   National Certificate: Landscape Irrigation  Level 3  NQF Level 03  Reregistered  2023-06-30  AgriSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.