pvbh18c-raf-13s-10-c21v20b-31-0b-031

The pvbh18c-raf-13s-10-c21v20b-31-0b-031 pump is built by Vickers in the Piston Pumps series and supplies pressurized hydraulic fluid to automated circuits. It follows pump design number 10, which fixes the internal geometry for the required displacement range. The unit turns with right-hand clockwise rotation so it pairs with prime movers that share the same direction. A straight keyed SAE-CC shaft end delivers torque to the rotating group while permitting secure coupling to standard drive hubs. The front mount flange is an SAE C four-bolt pattern that positions the housing accurately on power take-off pads. Fluid entry and exit occur through SAE four-bolt flange pads that support high flow without threaded joints. An SAE A two-bolt thru-drive pad is provided to pass mechanical power to a secondary pump, allowing tandem arrangements within a single drivetrain. These mechanical features enable straightforward installation in mobile or industrial hydraulic automation systems.

The pump uses a pressure compensator with load sense control to automatically match flow to circuit demand. The control acts against a load-sense differential of 20 bar so the swashplate maintains the commanded pressure margin above downstream load pressure. A 0.15-inch bleed orifice in the load-sense line stabilizes the control signal by removing trapped air and dampening transients. Maximum outlet pressure is limited by a compensator setting of 210 bar to protect downstream components from overload. Control design number 31 identifies the trim package that determines these pressure thresholds and response curves. A single one-way shaft seal prevents external leakage while tolerating pump case pressure during normal operation. The special feature suffix 031 denotes additional factory options that align the model with specific system requirements yet do not change the primary ratings. Collectively, these hydraulic control elements allow the pump to deliver energy efficiently and safeguard the actuators connected to automated machinery.