Vickers | P-B20-FRS-20-C-11
P B20-FRS-20-C-11
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The P B20-FRS-20-C-11 is manufactured by Vickers for the Piston Pumps series and supplies hydraulic power in automated machinery. Its displacement of 42.80 cm³/rev (2.61 in³/rev) determines the volume moved per revolution, while locating the displacement zone on one side of center keeps the swashplate motion to a single direction for straightforward control. When driven at 1750 rpm the unit delivers 20 gpm, providing consistent flow to cylinders and motors at typical industrial speeds. A pressure-compensator control identified as code C trims the swashplate angle so output falls as circuit pressure approaches the limit. That limit is 210 bar (3000 psi), letting the pump operate in medium-pressure systems without overloading components. Bearing life is projected at 8000 h under rated pressure, outlining expected service intervals. Viewed from the shaft end the rotation is clockwise, a requirement for matching motor direction during installation.
The hydraulic interfaces are arranged for efficient plumbing: both inlet and outlet are SAE-20 ports to reduce flow losses, and they share a 1-5/8-12 SAE thread so standard fittings mate directly. A separate SAE-8 case-drain port allows leakage oil to return to tank and keeps housing pressure low. The drive end features a 1.25 in shaft diameter and a 1.875 in shaft length, dimensions that fit common flexible couplings in power units. Torque is transmitted through a 5/16 in key, preventing relative motion between shaft and hub during load changes. These shaft proportions also simplify alignment when the pump is bolted to an electric motor. The assembled unit weighs 60 lb, information used to size mounting brackets and handling equipment.
Technical Specifications
Bearing Life At Rated Pressure
8000 h
Case Drain Port Size
SAE-8
Control Type
Pressure Compensator (C)
Displacement
42.80 cm3/rev (2.61 in3/rev)
Displacement Zone
One Side Of Center
Inlet Port Size
SAE-20
Key Size
5/16 in
Max Pressure
210 bar (3000 psi)
Outlet Port Size
SAE-20
Port Thread Size
1-5/8-12 SAE
Rated Flow @ 1750 Rpm
20 gpm
Rotation (view Shaft End)
Clockwise
Shaft Diameter
1.25 in
Shaft Length
1.875 in
Weight
60 lb
1620 Old Apex Road
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