11166797

The 11166797 piston pump is manufactured by Danfoss as part of the Open Circuit Piston Pumps series for hydraulic automation tasks that require variable flow. It applies load sensing and pressure compensation control to maintain system pressure while adjusting displacement as demand changes. A displacement of 147 cm³ per revolution establishes the volume moved by each shaft turn. Under nominal conditions it delivers a rated flow of 309 L/min to supply actuators and valves. Continuous operation is permitted up to 2100 rpm so the drive motor can run at standard speeds. The unit sustains 260 bar continuously, enabling stable circuit pressure in mobile or industrial machinery. Clockwise rotation defines the correct orientation for hose routing and pump mounting. Power is transmitted through a 14-tooth 12/24 pitch spline shaft which mates with SAE-C couplings. Fluid passages use a 4-bolt split flange arrangement sized 2.5/1.25 in to handle high flow without excessive pressure loss. Sealing is provided by a single Viton element combined with an SAE-C 4-bolt flange and ORB ports to limit leakage at elevated temperatures.

The adjustable displacement limiter set at the maximum swashplate angle lets technicians cap stroke length to control peak flow. An endcap in the radial running cover style supports internal components and eases service access. The gain orifice of 1.0 mm tunes the load-sensing circuit for proportional response to pressure shifts. A load-sense setting of 20 bar establishes the differential pressure the controller maintains across the main orifice. Maximum system pressure reaches 350 bar, giving reserve capacity for transient loads above the continuous rating. Intermittent speed can rise to 2475 rpm to accommodate short bursts of higher machine throughput. The pump weighs 54.9 kg which influences support structure sizing and handling during maintenance. These combined characteristics suit open circuit systems that demand accurate pressure regulation, high flow, and compact installation.