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CSA/AM ANSI Z21.22-1999/CSA 4.4-M99
Relief Valves for Hot Water Supply Systems - First Edition
Organization:
CSA/AM - CSA America, Inc.
Year: 2004
Abstract: This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials:
a. Temperature relief valves and combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation "T&P" valves, hereinafter called.
b. Valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation.
c. Vacuum relief valves.
A temperature relief valve, or a T&P valve shall operate when the temperature sensing element is at 210°F (99°C) or less. A device with a higher operating temperature is not acceptable under this Standard.
A vacuum relief valve shall be of a single-purpose type.
All references to psi throughout this standard are to be considered gage pressures unless otherwise specified.
Exhibit A contains provisions that are unique to Canada.
a. Temperature relief valves and combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation "T&P" valves, hereinafter called.
b. Valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation.
c. Vacuum relief valves.
A temperature relief valve, or a T&P valve shall operate when the temperature sensing element is at 210°F (99°C) or less. A device with a higher operating temperature is not acceptable under this Standard.
A vacuum relief valve shall be of a single-purpose type.
All references to psi throughout this standard are to be considered gage pressures unless otherwise specified.
Exhibit A contains provisions that are unique to Canada.
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CSA/AM ANSI Z21.22-1999/CSA 4.4-M99
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| contributor author | CSA/AM - CSA America, Inc. | |
| date accessioned | 2017-09-04T18:00:41Z | |
| date available | 2017-09-04T18:00:41Z | |
| date copyright | 1999.04.01 (R 2004) | |
| date issued | 2004 | |
| identifier other | AAZMIBAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/183696 | |
| description abstract | This standard applies to the following types of relief valves constructed entirely of new, unused parts and materials: a. Temperature relief valves and combination temperature and pressure relief valves for use on storage tanks of hot water supply systems without heater input limitation "T&P" valves, hereinafter called. b. Valves having only pressure relief features for use on storage tanks of hot water supply systems without heater input limitation. c. Vacuum relief valves. A temperature relief valve, or a T&P valve shall operate when the temperature sensing element is at 210°F (99°C) or less. A device with a higher operating temperature is not acceptable under this Standard. A vacuum relief valve shall be of a single-purpose type. All references to psi throughout this standard are to be considered gage pressures unless otherwise specified. Exhibit A contains provisions that are unique to Canada. | |
| language | English | |
| title | CSA/AM ANSI Z21.22-1999/CSA 4.4-M99 | num |
| title | Relief Valves for Hot Water Supply Systems - First Edition | en |
| type | standard | |
| page | 76 | |
| status | Revised | |
| tree | CSA/AM - CSA America, Inc.:;2004 | |
| contenttype | fulltext |