Air release valve
- Certificate: UL Listed / FM Approved
- Standard: UL 2573, NFPA 20, AWWA C512
- Connection: Threaded, NPT / BSPT / BSPP
- Feature: Small orifice, vent air only
- Temperature: Max 82°C, water
- W. pressure: 300 / 250 / 200 psi
- Surface: FBE coating as AWWA C550
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Description
Air release valve is used in wet pipe sprinkler systems and on casing of horizontal split case pump, so to automatically release small pockets of accumulated air while the system operates under pressure exceeding atmospheric pressure.
Available size (Source 1 with UL/FM)
| Inlet | Outlet | Orifice | Working pressure (psi) | Ref.No. |
|---|---|---|---|---|
| 1/2″ NPT | 1/2″ NPT | 1/16″ | 300 | U1701 (UL/FM) |
| 3/4″ NPT | 1/2″ NPT | 1/16″ | 300 | U1702 (UL/FM) |
| 1″ NPT | 1/2″ NPT | 1/16″ | 300 | U1703 (UL/FM) |
Available size (Source 2 with UL/FM)
| Inlet | Outlet | Orifice | Working pressure (psi) | Ref.No. |
|---|---|---|---|---|
| 1/2″ NPT | 1/2″ NPT | 1/16″ | 300 | U1711 (UL/FM) |
| 1/2″ NPT | 1/2″ NPT | 3/32″ | 300 | U1712 (UL/FM) |
| 3/4″ NPT | 1/2″ NPT | 1/16″ | 300 | U1713 (UL/FM) |
| 3/4″ NPT | 1/2″ NPT | 3/32″ | 300 | U1714 (UL/FM) |
| 1″ NPT | 1/2″ NPT | 1/16″ | 300 | U1715 (UL/FM) |
| 1″ NPT | 1/2″ NPT | 3/32″ | 300 | U1716 (UL/FM) |
Available size (Source 2 with ISO)
| Inlet | Connection | Working pressure (psi) | Ref.No. |
|---|---|---|---|
| 2″ / DN50 | FLG | 250 | U1717 (ISO) |
| 2-1/2″ / DN65 | FLG | 250 | U1718 (ISO) |
| 3″ / DN80 | FLG | 250 | U1719 (ISO) |
| 4″ / DN100 | FLG | 250 | U1720 (ISO) |
| 6″ / DN150 | FLG | 250 | U1721 (ISO) |
| 8″ / DN200 | FLG | 250 | U1722 (ISO) |
Available size (Source 3 with FM)
| Inlet | Outlet | Orifice | Working pressure (psi) | Ref.No. |
|---|---|---|---|---|
| 1/2″ NPT / BSPT / BSPP | 1/2″ NPT | 1/16″ | 200 | U1731 (FM) |
| 3/4″ NPT / BSPT / BSPP | 1/2″ NPT | 1/16″ | 200 | U1732 (FM) |
| 1″ NPT / BSPT / BSPP | 1/2″ NPT | 1/16″ | 200 | U1733 (FM) |
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