Vickers | PVB29-FRSFW-20-CM
PVB29 FRSFW 20 CM
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The PVB29 FRSFW 20 CM piston pump is manufactured by Vickers within the PVB Piston Pumps series. Intended for hydraulic automation circuits, it employs a pressure compensator (CM) with design number 20 so outlet pressure can be trimmed automatically to system demand. The compensator acts on a dedicated control line that may reach 100 bar (1500 psi), allowing rapid swash-plate adjustment. A geometric displacement of 61.6 cm³ per revolution supports a rated flow of 109.7 L/min when the shaft turns at its nominal 1800 r/min, which matches common electric motor speeds. Under those conditions the pump draws a maximum of 29.4 kW, giving designers a clear picture of drive-motor sizing. The unit tolerates system pressures up to 140 bar to handle medium-duty actuators, and the internal rotating group is arranged on one side of center to keep package length short. Clockwise rotation is specified for direct coupling to standard right-hand prime movers.
For installation environments, the pump operates in ambient temperatures from –20 °C (–4 °F) up to 70 °C (158 °F), enabling year-round service in mobile or factory settings. Mineral oil can be circulated until the fluid reaches 80 °C (176 °F), while water-containing blends must remain below 54 °C (129 °F) to protect bearing surfaces. Circuit cleanliness must meet ISO 18/14 so the hydrostatic slipper pads remain free of abrasive particles. Acoustic emission stays at 81 dB(A) when running 1800 r/min and delivering 140 bar, a level that guides enclosure and hearing-protection planning. The specified noise figure is achieved thanks to balanced piston phasing and controlled swash-plate movement. These thermal, fluid, and contamination limits complement the flow and pressure data described earlier and define the full operating envelope for reliable hydraulic power generation.
Technical Specifications
Ambient Temperature Maximum
+70 C (+158 F)
Ambient Temperature Minimum
–20 C (–4 F)
Cleanliness Class
ISO 18/14
Control Pressure Maximum (cm)
100 bar (1500 psi)
Control Type
Pressure Compensator (CM)
Design Number
20
Displacement Zone
One Side Of Center
Fluid Temperature Max (mineral Oil)
+80 C (+176 F)
Fluid Temperature Max (water-containing)
+54 C (+129 F)
Geometric Displacement
61.6 cm3/rev (3.76 in3/rev)
Input Power @ Max
29.4 kW (39.5 hp)
Maximum Outlet Pressure (aw Oil)
140 bar (2000 psi)
Maximum Shaft Speed
1800 r/min
Noise Level @ 1800 R/min, 140 Bar
81 dB(A)
Rated Flow @ 1800 R/min
109.7 L/min (29.0 gpm)
Rotation
Clockwise
1620 Old Apex Road
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