Pneumatic equipment that operates at higher than recommended pressure can cause excess torque, force and wear and can waste compressed air. Operating below specified pressure can cause machines to fail to meet their design performance specifications. Therefore, precise air pressure control is essential to efficient operation of air powered equipment. An air line regulator is a specialized control valve which reduces upstream supply pressure level to a specified constant downstream pressure. Regulates air pressure of the air line Self-relieving style units Features three position non-rising knob - push to lock, pull to adjust and detach to make tamper-resistant Pipe Size: 1/2" Max Flow SCFM: 100 Adjustment Type: Adjustment Knob Pressure Gauge: Included Gauge Port: (2) 1/4" NPT Operating Temp. Range: 40°-120°F Adjustment Range: 5 to 125 psig