V20 1S11S 38C11

The V20 1S11S 38C11 pump is built by Vickers and belongs to the Square Vane Pumps series. Designed for fixed-flow hydraulic circuits, it is identified as a fixed-displacement vane unit so the delivered volume per revolution remains constant for precise actuator control. A displacement of 36.4 cm³ per revolution (2.22 in³/rev) defines the amount of oil moved each shaft turn and supports stable system response. At the rated flow of 11 gpm when driven at 1200 rpm under 100 psi, the pump maintains predictable output for moderate duty machines. The unit tolerates a maximum operating pressure of 172 bar (2500 psi) so it can service medium-pressure presses or mobile implements. When pressure reaches that limit, the input power requirement peaks at 28 kW (37.5 hp) which helps users size prime movers correctly. Continuous speeds up to 2500 rpm permit coupling to standard industrial motors without exceeding the hydraulic envelope. A standard cover encloses the cartridge section and provides normal service access without special tools.

For mechanical integration, the V20 1S11S 38C11 mounts with a 2-bolt SAE A flange, allowing quick alignment on power take-off pads or pump brackets. Oil enters through an inlet port threaded 1.625-12 UN-2B, and the outlet port uses a 1.0625-12 UN-2B thread; both threads match common SAE straight-thread adapters for leak-free tube assemblies. The outlet orientation is coded C, meaning the discharge port sits in line with the inlet so hose runs remain compact in cramped skids. Torque is transmitted by an eleven-tooth spline that follows a 16/32 DP flat root side fit profile to minimize wear during cyclic load changes. A 30-degree pressure angle further distributes load across the spline flanks for longer shaft life. Together, the tooth count, pitch, and angle let the shaft connect directly to standard hydraulic drive couplings without additional machining. These installation and drive details complement the performance data in the first paragraph and complete the technical overview.