- Connection 2" (M) NPT
- Preset at minimum air flow or maximum pressure/vacuum level
- Valves protect regenerative blowers from overheating
Most Fuji Ring Compressors should not be operated in a "dead-head" condition. These relief valves are designed to protect the blowers from overheating when operating dead-headed under vacumm. The valves are preset to provide the proper protection for the appropriate model, which is approximately 90% of the dead-head vacuum and is adjustable to a lower setting. Dayton Reference 5Z580.