This Northman adjustable relief valve is designed to limit the operating pressure in a hydraulic system to a maximum set pressure. The valve may be connected into the pressure line so that system pressure flows through, or it may be teed off the pressure line with one of the pressure ports plugged. When the system reaches the maximum desired setting, the internal piston moves to smoothly relieve pressure to tank, maintaining stable pressure control and repeatability. Ports are also provided for a gauge and for remote pressure control sold separately. Flow GPM 50, Max. PSI 3,550, Adjustable Pressure PSI 100-1,000, Port Size in. 3/4, Gauge Port in. 1/4. In-line mount Remote pressure control compatible Model Number: RF-T06-1-30-N. Size: 3. Color: Port. Age Group: Adult.