Vacuum Relief Valves- Series 374A
½" and ¾" (15 and 20mm) Male NPT
For automatic venting of a closed system to atmosphere when a vacuum is created. The Watts N36-M1 Vacuum Relief Valve permits air to enter and prevent vacuum conditions that could siphon the water from the system, resulting in collapse of a tank or water heater or equipment burn out.
APPLICATIONS
Note: Vacuum relief valves are not designed or approved as back-siphonage backflow preventers. For protection against back-siphonage install Watts Series 288A vacuum breakers.
APPLICATIONS
- Domestic water heaters and supply tanks
- Table top heaters
- Jacketed steam kettles
- Unit heaters
- Low pressure steam systems
- Steam coil heaters
Note: Vacuum relief valves are not designed or approved as back-siphonage backflow preventers. For protection against back-siphonage install Watts Series 288A vacuum breakers.
FEATURES
Domestic Hot Water Supply Tanks and Heaters with Top Supply
SPECIFICATIONS
MATERIALS
PRESSURE-TEMPERATURE
CAPACITY
STANDARDS
DIMENSIONS - WEIGHT
TYPICAL INSTALLATIONS
- Low profile
- All brass body
- Protective cap
- Suitable for low pressure steam and water service
- Tested and rated to ANSI Z21.22
- CSA certified
Domestic Hot Water Supply Tanks and Heaters with Top Supply
A Watts Model N36-M1 Vacuum Relief Valve shall be installed on domestic hot water supply tanks/ heaters/unit heaters/ steam kettles as indicated on plans. The vacuum relief valve shall be ANSI Z21.22 rated and CSA certified. The vacuum relief valve shall have an all brass body and include a protective cap.
Maximum steam working pressure:15 psi (1.03 bars)
Maximum temperature:250°F (121°C)
| Size (DN) | Model | Ventaing Capacity | ||
|---|---|---|---|---|
| in. | mm | CFM | LPM | |
| ½ | 15 | N36-M1 | 15 | 425 |
| ¾ | 20 | N36-M1 | 15 | 425 |
Tested and rated to ANSI Z21.22
CSA Certified
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| Water Service | |
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| Steam Service | |
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