Vickers | PVB20-RS-20-CM-11
PVB20-RS-20-CM-11
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The PVB20-RS-20-CM-11 is manufactured by Vickers and belongs to the PVB Piston Pumps series, where it supplies regulated hydraulic power for automated machinery. It delivers a displacement of 42.80 cm³ per revolution (2.61 in³ per revolution), sending a predictable oil volume to downstream actuators. At 1800 rpm the unit provides a maximum flow of 75.7 L/min (20.0 gpm), supporting circuits that need steady delivery rates. A pressure-compensator control marked CM trims output to sustain the required line pressure, while a maximum outlet rating of 210 bar (3000 psi) allows operation in medium-pressure systems. Inlet pressure must stay below 1.0 bar (15 psi) to prevent cavitation. The rotating group is biased to one side of center according to the specified displacement zone, and the drive group turns clockwise to match standard right-hand engine layouts.
Ambient temperature limits extend from −20 °C (−4 °F) up to +70 °C (+158 °F) so the pump can function in cold starts and warm enclosures. Hydraulic connections use 1.625-12 UNF-2B SAE O-ring threads on both inlet and outlet ports to achieve leak-free seals, while a separate 0.750-16 UNF-2B case-drain port returns internal leakage to tank. Mounting is handled by a flange with a 212.8 mm (8.38 in) bolt circle and 17.5 mm (0.69 in) holes, making it compatible with common power-unit frames. Torque is transmitted through a 31.75 mm (1.250 in) shaft that carries a 7.9 mm square key cut to 31.7 mm, providing secure coupling to prime movers. These dimensional and connection characteristics support straightforward installation in automated hydraulic power packs.
Technical Specifications
Bolt Circle Diameter
212.8 mm (8.38 in)
Bolt Hole Diameter
17.5 mm (0.69 in)
Case Drain Port Thread
0.750-16 UNF-2B
Control Type
Pressure Compensator (CM)
Displacement
42.80 cm3/rev (2.61 in3/rev)
Displacement Zone
One Side Of Center
Max Ambient Temperature
+70 C (+158 F)
Max Flow @1800 Rpm
75.7 L/min (20.0 gpm)
Max Inlet Pressure
1.0 bar (15 psi)
Max Outlet Pressure (oil)
210 bar (3000 psi)
Min Ambient Temperature
-20 C (-4 F)
Port Thread (inlet/outlet)
1.625-12 UNF-2B (SAE O-ring)
Rotation
Clockwise
Shaft Diameter
31.75 mm (1.250 in)
Shaft Key Size
7.9 mm Square x 31.7 mm
1620 Old Apex Road
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