NZS 4608:1992
Control valves for hot water systems
Sets out the design, construction, performance and testing requirements of valves for pressure control, expansion control, pressure relief, vacuum relief, temperature relief and non-return functions. Applies to systems with static supply pressures up to 1600 kPa (163 mH2O) and working pressures up to 500 kPa (51 mH2O) with temperatures not normally exceeding 85 degrees C, installed to NZS 4603 and 4607. Referenced in BIA Approved Document G12.
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COMMITTEE REPRESENTATION
CONTENTS
RELATED DOCUMENTS
FOREWORD
REVIEW OF STANDARDS
1 SCOPE AND GENERAL
101 SCOPE
102 UNITS OF PRESSURE
103 DEFINITIONS
2 GENERAL REQUIREMENTS
201 MATERIALS
202 CONSTRUCTION AND DESIGN
3 SPECIFIC REQUIREMENTS
301 PRESSURE CONTROL VALVES
302 EXPANSION CONTROL VALVES
303 PRESSURE RELIEF VALVES
304 VACUUM RELIEF VALVES
305 TEMPERATURE RELIEF VALVES
306 NON-RETURN VALVES
4 TYPE AND PRODUCTION TESTING
401 TYPE TESTS
402 PRODUCTION TESTS
5 PACKAGING AND MARKING
501 PACKAGING
502 MARKING
APPENDIX
A HYDRAULIC PRESSURE TEST
B FLOW AND OPERATING PRESSURE TEST
C VACUUM AND FLOW TEST
D HEAT RATING TEST
E TEMPERATURE RESPONSE TEST
Table 1 – Type test requirements
Figure B1 – Typical test rig for determining flow and operating pressure
OTHER NEW ZEALAND STANDARDS FOR WATER HEATING SYSTEMS
STANDARDS COUNCIL APPROVAL
- G12
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References
Installation of thermal storage electric water heaters: valve-vented systems
Specification for pipe threads for tubes and fittings where pressure-tight joints are not made on the threads (metric dimensions)
Related Information
Building Code Compliance Document G12
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: AS1
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COMMITTEE REPRESENTATION
CONTENTS
RELATED DOCUMENTS
FOREWORD
REVIEW OF STANDARDS
1 SCOPE AND GENERAL
101 SCOPE
102 UNITS OF PRESSURE
103 DEFINITIONS
2 GENERAL REQUIREMENTS
201 MATERIALS
202 CONSTRUCTION AND DESIGN
3 SPECIFIC REQUIREMENTS
301 PRESSURE CONTROL VALVES
302 EXPANSION CONTROL VALVES
303 PRESSURE RELIEF VALVES
304 VACUUM RELIEF VALVES
305 TEMPERATURE RELIEF VALVES
306 NON-RETURN VALVES
4 TYPE AND PRODUCTION TESTING
401 TYPE TESTS
402 PRODUCTION TESTS
5 PACKAGING AND MARKING
501 PACKAGING
502 MARKING
APPENDIX
A HYDRAULIC PRESSURE TEST
B FLOW AND OPERATING PRESSURE TEST
C VACUUM AND FLOW TEST
D HEAT RATING TEST
E TEMPERATURE RESPONSE TEST
Table 1 – Type test requirements
Figure B1 – Typical test rig for determining flow and operating pressure
OTHER NEW ZEALAND STANDARDS FOR WATER HEATING SYSTEMS
STANDARDS COUNCIL APPROVAL
- G12
NZS 4608:1992
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.