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ASSE 1012
Performance Requirements for Backflow Preventers with an Intermediate Atmospheric Vent - ANSI Approved: September 2009
| contributor author | ASSE - American Society of Sanitary Engineering | |
| date accessioned | 2017-09-04T15:44:23Z | |
| date available | 2017-09-04T15:44:23Z | |
| date copyright | 03/11/2009 | |
| date issued | 2009 | |
| identifier other | POWWOCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/46733 | |
| description abstract | Description The devices covered by this standard are those which have functional capabilities for preventing both back-siphonage and back pressure and which can operate under continuous or intermittent pressure conditions. These devices have two (2) independently operating check valves separated by an intermediate chamber with a means for automatically venting it to the atmosphere and can be installed in the horizontal, vertical up or vertical down orientations. The check valves are force loaded to a normally closed position and the venting means is force loaded to a normally open position. Size Range Inlet and outlet pipe sizes are 1/4 to 3/4 NPS (8 mm to 20 mm) inclusive. Minimum Pressure Rating The device shall be designed and constructed for a working pressure of at least 150.0 psi (1034.2 kPa). Temperature Range The device shall be designed and constructed for normal flow temperatures of 40.0 °F to 210.0 °F (4.4 °C to 98.9 °C) and an emergency back pressure temperature of 250.0 °F (121.1 °C). Flow Rate Manufacturer's advertised maximum flow rate. | |
| language | English | |
| title | ASSE 1012 | num |
| title | Performance Requirements for Backflow Preventers with an Intermediate Atmospheric Vent - ANSI Approved: September 2009 | en |
| type | standard | |
| page | 24 | |
| status | Active | |
| tree | ASSE - American Society of Sanitary Engineering:;2009 | |
| contenttype | fulltext |
