Vickers | VVA20-FPCDWW21
VVA20-FPCDWW21
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The VVA20-FPCDWW21 hydraulic motor belongs to the Hydraulic Motors series and is produced by Vickers for automated fluid-power systems that require steady rotary motion. Its dual pressure compensator keeps flow nearly constant between two pressure settings so speed stays uniform as load varies. A geometric displacement of 19 cm³ per revolution defines the oil volume delivered each turn and sets available torque. The motor sustains up to 100 bar operating pressure, and its pilot port can also accept 100 bar, allowing control circuits to share the same supply without over-pressure. Reliable operation begins at 800 r/min, the minimum speed that maintains internal lubrication. Clockwise rotation when viewed from the shaft end fixes plumbing orientation during design. An SAE B mounting flange mates with standard pump pads, and UNF/SAE threaded ports simplify hose selection and reduce assembly time.
Service temperature must stay between ‑10 °C and 70 °C to protect seals and keep fluid viscosity within limits. During normal running, oil should remain between 16 cSt and 160 cSt so bearing films form without excessive drag, while cold starts are permitted at 800 cSt when the unit is set for full displacement or 200 cSt at zero displacement, preventing cavitation until fluid warms. A 25 µm absolute filtration rating controls particulate contamination and limits wear on the compensator spool and sliding surfaces. These viscosity, temperature, and cleanliness constraints support long service life and stable speed control in presses, conveyors, and other hydraulic drives.
Technical Specifications
Control Type
Dual Pressure Compensator
Filtration Rating
25 µm Absolute
Geometric Displacement
19 cm3/rev
Maximum Operating Pressure
100 bar
Minimum Speed
800 r/min
Mounting Flange
SAE B
Operating Temperature Maximum
70 °C
Operating Temperature Minimum
-10 °C
Pilot Port Maximum Pressure
100 bar
Port Thread
UNF/SAE
Running Viscosity Maximum
160 cSt
Running Viscosity Minimum
16 cSt
Shaft Rotation
Clockwise (Shaft End View)
Starting Viscosity Full Displacement
800 cSt
Starting Viscosity Zero Displacement
200 cSt
1620 Old Apex Road
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