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Nachi PVS – Variable Volume Piston Pump

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Nachi are a world-class manufacturer of pumps, valves, flow controls, hydraulic power units and other products. Known not only for product excellence but for our competitive pricing and product availability.

The VDC series high pressure variable volume vane pumps are a new series of pumps. In addition to Nachi’s three exclusive mechanisms (pressure control; pressure balance; ring stopper mechanism), a unique and exclusive three-point ring support system which makes maximum utilization of high pressure oil has been adopted to provide stable high pressure and quiet operation.
The new series of hydraulic pumps are ideal for applications, such as: machine tools, industrial machinery and vehicles

High efficiency, high pressure operation

The unique pressure regulator and pressure balance mechanism, plus the exclusive three-point ring support system has improved performance during high pressure operation. The pump operates with high efficiency and stable performance up to a maximum of 140kgf/cm2 (2000 psi).

Low vibration and noise levels

The new mechanisms reduces vibration and noise levels. Of particular note is the unique and exclusive threepoint support system which uses, a regulating piston and a bias piston to eliminate vibration. The mechanism, together with improvements to the shape of the inlet and outlet ports and high performance journal bearings, has reduced the noise level during operation.

Fast Response

The ring stopper mechanism serves to allow swift response whether in starting, stopping, or with load fluctuations, for high precision operation.

Stable discharge with sharp cut-off characteristics

A revolutionary pressure compensator type pressure regulation mechanism provides, stable sharp cut-off characteristics. The compensator serves to provide stable and constant volume through our the pressure ranges.

High efficiency operation with reduced power loss

Efficiency has been improved with the new mechanisms and Nachi’s high precision machining technology. Power loss has been reduced, especially during dead-heading.

Easy adjusting in maintenance and handling

Maintenance is easier due to the positioning of the pressure adjusting mechanism and the volume adjusting mechanism on the same side of the pump.

Product Features

Description PVS-0B-8*0-E30 PVS-1B-16*0-(*)-E13 PVS-1B-22*0–(*)-E13 PVS-2B-35*0–(*)-E13 PVS-2B-45*0–(*)-E13
Volume 8.0 cm³/rev
(0.49 in³/rev)
16.5 cm³/rev
(1.01 in³/rev)
22.0 cm³/rev
(1.34 in³/rev)
35 cm³/rev
(2.14 in³/rev)
45.0 cm³/rev
(2.76 in³/rev)
Discharge Volume at 1000 min 8.0 L/min
(2.1 gpm)
16.5 L/min
(4.4 gpm)
22.0 L/min
(5.8 gpm)
35.0 L/min
(9.2 gpm)
45.0 L/min
(11.9 gpm)
Discharge Volume at 1200 min 9.6 L/min
(2.5 gpm)
19.8 L/min
(5.2 gpm)
26.4 L/min
(7.0 gpm)
42.0 L/min
(11.1 gpm)
54.0 L/min
(14.3 gpm)
Discharge Volume at 1500 min 12.0 L/min
(3.2 gpm)
24.7 L/min
(6.5 gpm)
33.0 L/min
(8.7 gpm)
52.5 L/min
(13.9 gpm)
67.5 L/min
(17.9 gpm)
Discharge Volume at 1800 min 14.4 L/min
(3.8 gpm)
29.7 L/min
(7.8 gpm)
39.6 L/min
(10.5 gpm)
63.0 L/min
(16.6 gpm)
81.0 L/min
(21.5 gpm)
Allowable peak pressure 25 MPa
(3643 PSI)
25 MPa
(3643 PSI)
25 MPa
(3643 PSI)
25 MPa
(3643 PSI)
25 MPa
(3643 PSI)
Min Revolution Speed 500 min¹ 500 min¹ 500 min¹ 500 min¹ 500 min¹
Max Revolution Speed 2000 min¹ 2000 min¹ 2000 min¹ 2000 min¹ 2000 min¹
Weight 17.0 Lb 23.0 Lb 23.0 Lb 51.0 Lb 51.0 Lb

Nachi – PVS – Variable Volume Piston Pump – Datasheet

Additional Information

Hydraulic Pump Units

Piston Pump

Manufacturer

Nachi

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