ASSE 1056
Performance Requirements for Spill Resistant Vacuum Breaker Assemblies
| Organization: | ASSE |
| Publication Date: | 1 May 2013 |
| Status: | active |
| Page Count: | 24 |
| ICS Code (Water supply systems): | 91.140.60 |
| ICS Code (Other valves): | 23.060.99 |
scope:
Description
This standard applies only to those assemblies classified as spill resistant vacuum breaker assemblies (SVB). These assemblies are designed for installation in water systems that are normally under continuous pressure conditions.
The assembly includes one (1) check valve force-loaded closed, an air inlet valve force-loaded open to atmosphere, positioned downstream of the check valve, two (2) tightly closing shut-off valves and two (2) test cocks or a #1 test cock and a bleed valve.
Size Range
The inlet and outlet nominal pipe sizes are ¼ NPS (8 DN), ⅜ NPS (10 DN), ½ NPS (15 DN), ¾ NPS (20 DN), 1 NPS (25 DN), 1 ¼ NPS (32 DN), 1 ½ NPS (40 DN) and 2 NPS (50 DN).
Pressure
These assemblies shall be designed for a working pressure of at least 150.0 psi (1034.2 kPa).
Temperature Range
These assemblies shall be designed for a temperature range of 33.0 °F to 140.0 °F (0.6 °C to 60.0 °C) or the manufacturer's maximum rated temperature, whichever is greater.
Document History
