NEW

PVS PISTON PUMPTHRU SHAFT SERIES

Dimensional Drawings

Energy-Saving Type with Drastically Reduced LossA NACHI-proprietary semi-circular barrel swash plate that receives pressure on its surface ensures a stable discharge volume at all times. This eliminates excess discharge volume, and enables the

effective use of power corresponding to the load cycle. This "energy-saving type" conserves energy, reduces power loss, and helps to reduce hydraulic costs.

Silent Type That Demonstrates Its Power QuietlyProprietary low-noise mechanisms are incorporated on the shoe, swash plate, valve plate, and other locations to ensure silent operation. In particular, a semi-circular barrel swash plate stabilizes operation characteristics to ensure silent operation.

PVS Piston Pump - Thru Shaft Series

Features

PVS-0B-8N3-K-E5737AVolume: .48 cu in (8 cc)Max. Operating Pressure: 3000 psiAllowable Peak Pressure: 3600 psiRotational Speed (max.): 1800/500 min ¹Rotational Direction: ClockwiseMounting Direction: Horizon for pump shaftControl Type: Pressure compensation typeMass: 16.9 lbsFluid: Anti-wear Hydraulic fluid ISO VG32-68Optimum OperatingViscosity: 20~200 centistokesTemperature Range: 40~140° FSuction Pressure: 4.3 psiDrain Back Pressure: 14 psi Peak Pressure: 28 psiFilteration Suction: 150 mesh Line: 10 micron

1. Add shaft side torque to head side torque, and handle total torque less than 95.5 N•m2. Pull total torque out of shaft side torque, and handle head torque less than 60 N•m

Setting of pressure and the displacement upon shipmentP: Minimum pressureq: Maximum pump capacity

-

Note:1. Before starting up the pump, fill the pump case with clean hydraulic operating fluid through the lubrication port (13.4 cu in)2. The maximum presure (set pressure + surge pressure) that can be momentarily allowed.3. Please refer to the standard catalog and instruction manual for the instruction of this pump.

9-10 ft lbs23-25 ft lbs

9-10 ft lbs

18-22 ft lbs

44-48 ft lbs

75-82 ft lbs

RotationDirection

Tandem-pump installationA sub-plate is necessary

(149.5)

14.5(5)(shaft end)

0-0.279

+0.0

50±0

.2

2.4±0.05

8

22

Involute spline specifications

Dp

Addendum circle diameter 15.4

FLAT ROOT SIDE FIT

0-0.2

Thru-drive allowable torque(TS: Shaft side pump, TH: Head side pump)

Case 1(at shaft side max)

Case 2(at head side max)

95.535.560

95.535.560

Torque N•m

T S max T H max T’ S max T’ H max

Case 1 T S max

T H max

T total

Torque N•m

Case 1 T’ S max

T’ H max

T’ total

T total T’ total

O-ringNBR-90 G50(JIS B 2401)

0-0.279

Involute splineSAE J498b

Flow rate adjusting screwLock nut tightening torque9-10 ft lbs

M8 thru4-

(for sub-plate)

Suction Port1•1/16-12UN-2BTightening torque75-82 lbs

46.52- 46.52-

(55) (55)

57 57

Discharge port3/4-16UNF-2BTightening torque44-48 ft lbs

28.5

2-28

.52-

(37)

(38)

Drain port9/16-18UNF-2BTightening torque23-25 ft lbs

219.5 (Max.)

18 49.5

(14 min.)

6

42.5

25.4 5

11

127.5

Name plate

(Discharge and Suction port)

149.5

162.5

0 -0.0

21 0 -0

.025

-0.0

36-0

.071

93

78

29

3

Pressureadjusting screwLock nuttightening torque

4.76 0-0.012

Key width

Lubrication portBSPP 1/4Tightening torque

(127

)

11

106.4

130

7749

PVS Series Variable Volume Piston Pumps

Dimensional DrawingsPVS-1B-16/22N3-K-E5737A

PVS-2B-35/45N3-KE5737A

Volume: 1 cu in (16 cc)/1.3 cu in (22cc)Max. Operating Pressure: 3000 psiAllowable Peak Pressure: 3600 psiRotational Speed (max.): 2000/500 min ¹Rotational Direction: ClockwiseMounting Direction: Horizon for pump shaftControl Type: Pressure compensation typeMass: 24 lbsFluid: Anti-wear Hydraulic fluid ISO VG32-68Optimum OperatingViscosity: 20~200 centistokesTemperature Range: 40~140° FSuction Pressure: 4 psiDrain Back Pressure: 14 psi Peak Pressure: 28 psiFilteration Suction: 150 mesh Line: 10 micron

-

1. Add shaft side torque to head side torque, and handle total torque less than 105 N•m2. Pull total torque out of shaft side torque, and handle head torque less than 60 N•m

Setting of pressure and the displacement upon shipmentP: Minimum pressureq: Maximum pump capacity

Note:1. Before starting up the pump, fill the pump case with clean hydraulic operating fluid through the lubrication port (18 cu in)2. The maximum presure (set pressure + surge pressure) that can be momentarily allowed.3. Please refer to the standard catalog and instruction manual for the instruction of this pump.

1054560

23-25 ft lbs

75-82 ft lbs

1057332

99-104 ft lbs

3.6-10 ft lbs 9-10 ft lbs

Torque N•m

Volume: 2.1 cu in (35cc)/2.7 cu in (45 cc)Max. Operating Pressure: 3000 psiAllowable Peak Pressure: 3600 psiRotational Speed (max.): 2000/500 min ¹Rotational Direction: ClockwiseMounting Direction: Horizon for pump shaftControl Type: Pressure compensation typeMass: 46 lbsFluid: Anti-wear Hydraulic fluid ISO VG32-68Optimum OperatingViscosity: 20~200 centistokesTemperature Range: 40~140° FSuction Pressure: 4 psiDrain Back Pressure: 14 psi Peak Pressure: 28 psiFilteration Suction: 150 mesh Line: 10 micron

-

1. Add shaft side torque to head side torque, and handle total torque less than 284 N•m2. Pull total torque out of shaft side torque, and handle head torque less than 90 N•m

Setting of pressure and the displacement upon shipmentP: Minimum pressureq: Maximum pump capacity

Note:1. Before starting up the pump, fill the pump case with clean hydraulic operating fluid through the lubrication port (39 cu in)2. The maximum presure (set pressure + surge pressure) that can be momentarily allowed.3. Please don’t adjust screw (* part) because it’s already been adjusted upon shipping.3. Please refer to the standard catalog and instruction manual for the instruction of this pump.

29.4

26.6

26.6

26.2

46.1

50.152.1

46.1

(80)

(120)144

4xM10depth16

Flow rate adjusting screwLock nut tightening torqueM12:42~46Nm

Suction Port

Discharge Port

88.553

6

-0 0.05

15192.5

(Discharge and Suction port)

222.5

69.5

6

38

3.9

28.18

Drain port 3/4-16UNF-2BTightening torque

59.8~65.8Nm

4xM10 depth16

6.35 +0-0.012

104

3

6513

144146

91

45

Pressure adjusting screwLock nut tightening torque

M8:12.5~13.8Nm

Lubrication port G3/8Tightening torque49~54Nm

Detail of Suction port

4xM10 depth16

237.5

SAEJ518b-1

SAEJ518b-1*1/4

30.2

58

.7

52.4

26.2

257.5

Key Width

172

172

106.4

130

Rotationdirection

Pressure adjusting screwLock nut tightening torque 42

Lubrication portBSPP 3/8

36-39 ft lbsTightening torque

382

11

(137

)

52

88

73

Flow rate adjusting screwLock nut tightening torque

Drain port9/16-18UNF-2BTightening torque

242 (Max.)

77.5 49.5

23 (Min.)

43

6

25.4 5

Key width4.76 0

-0.012

-0.0

36-0

.071

0 -0.0

21 0 -0

.025

12.5158.5

181.5

194.5

Name plate

(Discharge and Suction port)

Discharge port1•1/16-12UN-2BTightening torque

626247.9

(36)(36)2-47.92-

(35)

(35) 26

2-26

2-

99-104 ft lbs

Suction port1•5/16-12UN-2BTightening torque

M8 depth18

(For sub-plate)

4-

Detail of Suction port

Tandem-pump installationA sub-plate is necessary

(181.5)

14.5(5)(shaft end)

SAE J498bInvolute spline

Involute spline specifications

Dp

Addendum circle diameter 15.4

FLAT ROOT SIDE FIT

0-0.2

0-0.279

+0.0

50±0

.2

2.4±0.05

8

22

O-ringNBR-90 G50(JIS B 2401)

Thru-drive allowable torque(TS: Shaft side pump, TH: Head side pump)

Case 1(at shaft side max)

Case 2(at head side max)

T total T’ total

T S max T H max T’ S max T’ H max

Case 1 T S max

T H max

T total

Torque N•m

Case 1 T’ S max

T’ H max

T’ total

Tandem-pump installationA sub-plate is necessary

(222.5)

14.5(10)(shaft end) Involute spline

0-0.279

2.4±0.05

1029.5

O-ringNBR-90 G70(JIS B 2401)

SAE J498b

Involute spline specifications

Dp

Addendum circle diameter 18.6

FLAT ROOT SIDE FIT

0-0.2

Thru-drive allowable torque(TS: Shaft side pump, TH: Head side pump)

Case 1(at shaft side max)

Case 2(at head side max)

28419490

28419985

Torque N•m

T S max T H max T’ S max T’ H max

Case 1 T S max

T H max

T total

Torque N•m

Case 1 T’ S max

T’ H max

T’ total

T total T’ total

0-0.021

0-0.025

±0.2

±0.2

±0.2

+0.0

50

±0.2

±0.2

Nachi America Inc.715 Pushville Rd, Greenwood, IN 46143Tel. (800) 622-4410 Fax. (317) 530-1015Email: hydraulics@nachiamerica.comwww.nachiamerica.com October 2016

PVS – 0 B – 8 - N - 3 - K - E5737A

Model CodeHow to Order

K: Key Shaft

Pressure adjustment range (A: constant discharge type) 1: Up to 1000 psi 3: Up to 3000 psi 2: Up to 2000 psi

Variable Control MechanismsN: Pressure Compensation type R= Load Sensing Type P= Remote Control Type

Pump Capacity (cc): 8, 16, 22, 35, 45

Note: 1. Note that there are certain restrictions on pump capacity and motor capacity combinations. 2. Design numbers are subject to change without notice.

Mounting Method B: Flange Type Mounting

PVS Series variable volume piston pump unit

Design No.

Pump Size: O, 1, 2

Calculation of Torque

[Formula]

[Example] Front :0.4Cu in at 2000psi (Remote control:PVS-0B-8P2-K-E5737Z) Rear :0.4Cu in at 500psi (Remote control:PVS-0B-8P1-K-E5737Z)