25VQ17A 1C20

The 25VQ17A 1C20 hydraulic pump belongs to the VQ Thru-Drive Vane Pumps series and is manufactured by Vickers for closed-loop hydraulic automation where compact thru-drive capability is required. Its displacement of 55.2 cm³ per revolution provides a fixed volume transfer each shaft turn, helping designers calculate circuit flow with precision. At maximum speed and pressure the unit delivers 119.2 L/min (31 US gpm), allowing it to supply medium-capacity actuators without auxiliary boosters. To achieve this output it absorbs 51.8 kW (69.5 hp) of mechanical power, so prime movers must be sized for that load. The assembly tolerates system pressures up to 210 bar (3000 psi), making it suitable for mobile and industrial lines running at high pressure. When driven at 1200 r/min under a 100-psi condition it yields a nominal flow of 17 US gpm, supporting energy-efficient low-pressure circulation stages. Right-hand clockwise rotation matches common engine drives, and a single shaft seal prevents external leakage while simplifying maintenance.

Design code 20 identifies the internal revision so replacement pumps can be matched without dimensional changes. A flange-mount interface lets the housing bolt directly to standard SAE engine or bellhousing pads, reducing alignment time. The 3/16-inch square key couples the shaft to the driver and transmits torque without fretting. Keeping the outlet in line with the inlet simplifies manifold piping and minimizes elbow losses. The standard pilot arrangement centers the unit during installation, ensuring concentric alignment with the prime mover. SAE four-bolt flanges on both ports provide rigid connections capable of withstanding full pressure without additional adapters. The pump weighs 14.5 kg (32 lb), permitting single-person handling during service or retrofit.