VDC SERIES HIGH PRESSURE TYPE

VARIABLE VOLUME VANE PUMP *

VDC Series 30 to 120ℓ/min M

0 *
High-Pressure Type Variable Volume Vane Pump 14MPa

Features B
qHighly efficient and stable stability. This minimizes ring vibration ensures a highly stable fixed discharge

Vane Pumps
B
and delivers quiet operation. rate, even in the high pressure range.
high-pressure operation
Innovative pressure control and pres- eOutstanding response, tHigh efficiency operation
sure balance mechanisms combine with
an original 3-point ring support system high-precision operation with minimal power loss

C
dramatically improves high-pressure An innovative new ring stopper elim- New mechanical innovations minimize
operation. The result is outstanding inates excessive ring displacement power loss, especially at full cutoff.
performance at high pressures up to and improves response. The result is
14MPa. high precision operation at all times, ySimplified maintenance
including during starts, stops, and load
and handling
wLow vibration and noise
A number of innovative new mecha-
changes.
Pressure adjusting and discharge rate
adjusting mechanisms are located on
D
nisms are adopted to minimize vibra- rPrecise characteristics for the same side of the pump for simplified
tion and noise. In particular, a 3-point a stable discharge rate maintenance and handling.

E
support system is used for the control A revolutionary new pressure compen-
piston and bias piston to increase ring sator type pressure control mechanism

Specifications
F
Pressure Adjustment Allowable Peak Revolution Speed
No-load Discharge Rate ℓ/min
Capacity Range Pressure min-1 Weight
Model No.

G
cm3/rev MPa MPa kg
1000min-1 1200min-1 1500min-1 1800min-1 Min. Max.
{kgf/cm2} {kgf/cm2}
VDC-1A(B)-1A2-20 1.5 to 3.5  {15.3 to 35.7}
14 {143}
1A3 2   to 7    {20.4 to 71.4}
16.7 16.7 20 25 30 800 1800 9.5
1A4 5   to 10.5 {51 to 107}

H
21 {214}
1A5 7   to 14   {71.4 to 143}
VDC-1A(B)-2A2-20 1.5 to 3.5  {15.3 to 35.7}
22 22 27 33 40 14 {143} 800 1800 9.5
2A3 2   to 7    {20.4 to 71.4}
VDC-2A(B)-1A2-20 1.5 to 3.5  {15.3 to 35.7}
14 {143}

I
1A3 2   to 7    {20.4 to 71.4}
30 30 36 45 54 800 1800 25
1A4 5   to 10.5 {51 to 107}
21 {214}
1A5 7   to 14   {71.4 to 143}
VDC-2A(B)-2A2-20 1.5 to 3.5  {15.3 to 35.7}
39 39 47 58 70 14 {143} 800 1800 25
2A3 2   to 7    {20.4 to 71.4}
VDC-3A(B)-1A2-20
1A3
67 67 80 100 120
1.5 to 3.5  {15.3 to 35.7}
2   to 7    {20.4 to 71.4}
14 {143}
800 1800
47
J
1A4 5   to 10.5 {51 to 107} (33)
21 {214}
1A5 7   to 14   {71.4 to 143}

Double Pump
Model No. Vent Side Shaft Side
K
Revolution
Pressure Adjust- Pressure Adjust- Speed min-1
Discharge Rate ℓ/min Discharge Rate ℓ/min Weight
Foot Mounting Type ment Range ment Range

L
kg
(Flange Mounting) MPa MPa
1800min-1 1500min-1 1800min-1 1500min-1 Min. Max.
{kgf/cm2} {kgf/cm2}
VDC-11A(B)-2A3-2A3-20 40 33 2 to   7 {20.4 to 71.4} Type A 27
40 33 2 to   7 {20.4 to 71.4} 800 1800
VDC-11A(B)-2A3-1A5-20 30 25 7 to 14 {71.4 to 143} Type B 20

M
VDC-12A(B)-2A3-2A3-20 70 58 2 to   7 {20.4 to 71.4}
40 33 2 to   7 {20.4 to 71.4}
VDC-12A(B)-2A3-1A5-20 54 45 7 to 14 {71.4 to 143} Type A 42
800 1800
VDC-12A(B)-1A5-2A3-20 70 58 2 to   7 {20.4 to 71.4} Type B 35
30 25 7 to 14 {71.4 to 143}
VDC-12A(B)-1A5-1A5-20 54 45 7 to 14 {71.4 to 143}
VDC-22A(B)-2A3-2A3-20 70 58 2 to   7 {20.4 to 71.4} Type A 62

N
70 58 2 to   7 {20.4 to 71.4} 800 1800
VDC-22A(B)-2A3-1A5-20 54 45 7 to 14 {71.4 to 143} Type B 50
VDC-13A(B)-2A3-1A3-20 2 to   7 {20.4 to 71.4}
40 33 2 to   7 {20.4 to 71.4}
VDC-13A(B)-2A3-1A5-20 7 to 14 {71.4 to 143} Type A 62
120 100 800 1800
VDC-13A(B)-1A5-1A3-20 2 to   7 {20.4 to 71.4} Type B 48
30 25 7 to 14 {71.4 to 143}
VDC-13A(B)-1A5-1A5-20
Note) 1. VDC-3A, VDC-11A, VDC-12A and VDC-13A are foot mounting types, and come with foot mountings.
2. VDC-1A and VDC-2A are sub plate types. Sub plates are not included.
7 to 14 {71.4 to 143}
O

B-25
 •Handling bFactory Default P-Q Settings (Stan- ⁄1For the hydraulic operating fluid, use
zRotation Direction The direction of dard Model) type ISO VG32 or equivalent (viscos-
rotation is always is clockwise (right-  • Flow Rate Setting = Maximum flow ity index of at least 90) for pressures
ward) when viewed from the shaft rate for model as indicated in the of 7MPa or lower, and type ISO VG68
side. catalog or equivalent (viscosity index of at
xDrain Drain piping must be direct  • Pressure Setting = Pressure shown least 90) for pressures greater than
piping up to a point that is below the in table below 7MP.

B
tank fluid level, and piping should nThrust Screw and Stopper ⁄2The operating temperature range is
comply with the conditions shown in The thrust screw and stopper are 15 to 60°C. When the oil temperature
the table below to ensure that back precision adjusted at the factory at startup is 15°C or less, perform a
pressure due to pipe resistance does during assembly. Never touch them. warm-up operation at low pressure
Vane Pumps

not exceed 0.1MPa. When using See callouts 15/43 and 15/38 in the until the oil temperature reaches

B a pump that has drain ports at two

locations, use the drain port that is
VDC-1A and 2A/3A cross-section di-
agrams on pages B-33 and B-34.
15°C. Use the pump in an area where
the temperature is within the range of
higher after the pump is installed. mAn unload circuit is required when 0 to 60°C.
In the case of a double pump, run the motor is started under condition ⁄3Suction pressure is -0.03 to
separate pipes from both the shaft λ − Δ. Contact your agent about the +0.03MPa (-0.3 to +0.3kgf/cm2), and
C side and the head side drains directly
connect to the tank, so the drain pipe
unload circuit.
,Initial Operation
the suction port flow rate should be
no greater than 2m/sec.
is below the surface of the oil. Before operating the pump for the ⁄4Avoid pulley, gear, and other drive
first time, put the pump discharge systems that impart a radial or thrust
Model No.
side into the noload state and then load on the end of the pump shaft.
D
VDC-1 VDC-2 VDC-3
Item
repeatedly start and stop the motor Mount the pump so its pump shaft is
Pipe Joint At least At least At least
to bleed all air from inside the pump oriented horizontally.
Size 1/4" 1/4" 3/8" and the suction piping. After confirm- ⁄5Provide a suction strainer with a filter-
At least At least At least
Pipe I.D. ing that the pump is discharging oil, ing grade of about 100μm (150 mesh).
φ 7.6 φ 7.6 φ 9.6
E
continue the no-load operation for For the return line to the tank, use a
Pipe at least 10 minutes to discharge all 25μm line filter.
1m or less 1m or less 1m or less
Length the air from the circuit. Provide an air ⁄6Manage hydraulic operating fluid so
cDischarge Volume Adjustment bleed valve in circuits where it is diffi- contamination is maintained at class
The discharge flow rate is decreased cult to bleed air before startup. NAS10 or lower. Take care to avoid

F by clockwise (rightward) rotation of

the discharge rate adjusting screw,
.Sub Plate
Use the table below for to specify a
sub plate type when one is required.
contamination with water and oth-
er foreign matter, and watch out for
discoloration. Whitish fluid indicates
and increased by counterclockwise
(leftward) rotation. ⁄0Foot Mounting that air has contaminated the fluid,
Loosen the lock nut before mak- For a double pump with VDC-3 foot and brownish fluid indicates the fluid

G ing adjustments. After adjustment

is complete, re-tighten the lock nut.
mounting, the foot mounting kit and
pump are sold as a set. When only
is dirty.
⁄7Contact your agent about using wa-
The graph below provides general the mounting feet are required, pump ter- and glycol-based hydraulic oper-
guidelines for the relationship be- mounting bolts, washers and other ating fluids.
parts are sold together as the Foot ⁄8At startup, repeat the inching oper-
H
tween the rotation angle of the flow
rate adjusting screw and the no-load Mounting Kit. ation (start-stop) to prime the pump
discharge rate. See page B-36 for detailed dimen- and bleed air from the pump and
However: Q=q × N × 10 −3 sions. pipes. (This pump has no fluid supply
Q : No-load Discharge RateQℓ/min port.)
(Continued on following page)
I q : Volume cm3/rev
N : Revolution Speed min−1
Flow Adjustment Rotation Angle (θ ) and Pump Capacity (q)
70

J
60
Pump capacity q cm3/rev

50
VD
C-
40 3
Factory Default

K 30
Pressure Settings
VD
VD
C- C-
2-2
MPa{kgf/cm2}
2-1 A*
A*
20 2 : 3.5 {35.7}
VDC-
1-1A* 3 : 3   {30.6}
12 VDC-
10 1-2A*
4 : 5   {51   }
L
8
6
5 : 7   {71.4}
0 90 180 270 360 450
Rotation angle θ °(clockwise)

Note)

M
The values indicated above are at
Sub Plate Number
maximum pump discharge volume
with the flow volume adjusting screw Pump Model No. Sub Plate Number Motor kW
at the 0° position. The broken line
MVD-1-115-10 0.75 to 1.5
shows the flow volume adjustment VDC-1A-1A*-20

N range lower limit value.

vPressure Adjustment Pressure is in-
MVD-1-135-10
MVD-1-115Y-10
2.2 to 3.7
0.75 to 1.5
VDC-1A-2A*-20
creased by clockwise (rightward) ro- MVD-1-135Y-10 2.2 to 3.7
tation of the discharge rate adjusting
MVD-2-135-10 2.2 to 3.7

O
screw, and decreased by counter- VDC-2A-*A*-20
clockwise (leftward) rotation. MVD-2-160-10 5.5
Loosen the lock nut before making
VDC-2A-2A*-20 MVD-2-160Z-10 5.5
adjustments. After adjustment is com-
plete, re-tighten the lock nut. Note) See pages B-17 and B-18 for detailed dimensions.

B-26
⁄9Equip an air bleed valve in circuits gidity. xChanging the revolution speed may
where it is difficult to bleed air before The angle error should be no greater also affect the pump performance
startup. See page C-13 for more in- than 1°. curves. Before using the inverter,
formation. check if the pressure and motor load
¤0When centering the pump shaft, ec- •Inverter Drive Precautions factor are within the range of use.
centricity with the motor shaft should zSet the revolution speed within the
be no greater than 0.05mm. Use a range of the pump specification rev-

B
pump mounting base of sufficient ri- olution speed.

Vane Pumps
Explanation of model No. B
Single Pump

VDC – 2 A – 1 A 2 – 20 C
Design number

Pressure adjustment range

2: 1.5 to 3.5MPa {15.3 to 35.7kgf/cm2} D
3: 2 to 7MPa {20.4 to 71.4kgf/cm2}
4: 5 to 10.5MPa {51 to 107kgf/cm2}
5: 7 to 14MPa {71.4 to 143kgf/cm2}
Note: Ring size: In the case of 2, maximum setting
pressure is 7Mpa (71.4kgf/cm2). E
Flow characteristics A: Constant discharge type

Ring size
at 1800min-1 F
Ring size VDC-1 VDC-2 VDC-3
1 30ℓ/min 54ℓ/min 120ℓ/min
2

Mounting method
40ℓ/min 70ℓ/min −
G
A: Foot type mounting B: Flange type mounting

Pump size
1: Type 1 2: Type 2 3: Type 3
H
Pump Type: VDC Series High-pressure Variable Discharge Rate Vane Pump

I
Double Pump

VDC – 1 2 A – 1 A 5 – 2 A 3 – 20
J
Design number

Shaft side pressure adjustment range K

3: 2 to 7MPa {20.4 to 71.4kgf/cm2}
5: 7 to 14MPa {71.4 to 143kgf/cm2}

Shaft side flow rate characteristics A: Constant discharge rate type

L
Shaft side ring size 1, 2
(Size 1 only for VDC-3)

Head side pressure adjustment range 3, 5

Head side flow rate characteristics A: Constant discharge rate type

M
Head side ring size 1, 2

Mounting method
A: Foot type mounting B: Flange type mounting N
Shaft side pump size 1, 2, 3

Head side pump size 1, 2

Pump Type: VDC Series High-pressure Variable Discharge Rate Vane Pump
O

B-27
 Installation Dimension Drawings
Single Pump
VDC-1A-*A*-20 Pressure adjusting 153
screw 138
63 33
130 Rc 1/4 DR

B
18 (1A4, 1A5 type only)
106
Vane Pumps

MAX.174

21.15 –0.2
0
25 4.76 +0.024
+0.012

53
131.4
106.9
C φ 19.05 –0.021

53.9 –0.1
0

0
14

D
Flow rate adjusting screw
85 26.5
91 MAX.113 59.5
MAX.205

E 4 to φ 11
140
120.6 ±0.2
51 0
R1
± 0.2

F
25.5
45

OUT ( φ26) DR ( φ 14) IN ( φ 31)

G O-ring 1A-P22 O-ring 1A-P10A O-ring 1A-P25

VDC-1B-*A*-20 Pressure adjusting 153

screw
H
138
59 37
130
33 Rc 1/4 DR
106
22.5
14

I
MAX.120
77.5

25
53

J
–0.04
0
φ 95.02

Flow rate
adjusting screw

K
85
12 4
91 MAX.113

L MAX.205
21.15 –0.2

4 to φ 11
0

M +0.024
4.76 +0.012

O Rc 3/4 IN φ 19.05 –0.021

0 Rc 1/2 OUT

M90 ±0.2
113
65 65

B-28
VDC-2A-*A*-20

Pressure adjusting 224.6

screw 204
160
90 54 Rc 1/4 DR
148
20

+0.024 B

27.7–0.1
40 4.76 +0.012

0
MAX.194

Vane Pumps
B

168
149

75 –0.1
φ 25.4 –0.021
0

0
C
16

107 Flow rate adjusting screw

130 MAX.139.5 (32.5)
MAX.269.5 86.5

D
187
159 4
4 to φ 13
R1
76
4
to E
30
58
14

OUT ( φ 40) DR ( φ19) IN ( φ 40)

F
O-ring 1A-G35 O-ring 1A-P15 O-ring 1A-G35 Note) O-ring 1A-** refers to JIS B2401-1A-**.

VDC-2B-*A*-20
G
Pressure adjusting 224.6

H
screw
160 204
148 98 46 Rc 1/4 DR
28
MAX.119

I
φ 25.4 –0.021
0

–0.1

40
93

77
27.7
φ 135 –0.04
0

Flow rate
adjusting
J
screw

130
107
MAX.139.5
16 4 K
42.5
MAX.269.5

4 to φ 13.5 L
+0.024
4.76 +0.012

O
Rc 1 IN M124 ±0.2 Rc 3/4 OUT
M150
(IN-OUT port dimension)

B-29
 VDC-3A-1A*-20

Rc 3/8 (DR) MAX 286.6

38 298 MAX 154.6 132
Pressure adjusting
33 153 85 screw 122
93 25
B
0
23 4 to M16 7.938 –0.015

φ 31.75 –0.051
P.C.D181

MAX.119
35.3 –0.2
Vane Pumps

116
B 48

286.4
4– φ 35x1 handhold
C

152.4 ±0.1
φ 18 holes

25
D
Foot

5
139.7±0.2 104.5
203 Mounting Kit 295.3 ±0.2
OUT flange IHM-45-10
Screw-in type IH03J-100080 334
Welded type IH03J-200080 180 φ 26
52.4±0.2 4-M10x18

E
26.2 ±0.2

Flow rate adjusting screw

31.8 50.8

F
±0.2
70

IN flange
φ 40
G
Screw-in type IH03J-100120
Welded type IH03J-200120 4-M12x23
36±0.2

H VDC-3B-1A*-20

I 38
33 213
298
85
Rc 3/8 DR
Pressure adjusting
MAX 286.6
MAX 154.6
122
132
0
screw 7.938 –0.015
153 6 181
φ 31.75 –0.051

93 164
0

23
J
35.3 –0.2

20
0

MAX 119

48
MAX 216
φ 127 –00.051

K
198
164
150
2 to 17.5

L OUT flange
Screw-in type IH03J-100080
Welded type IH03J-200080 180 φ 26 Note) Use the following table when specifying
52.4 ±0.2
M
4-M10x18 the piping flange kit.
26.2 ±0.2

Type Flange Kit model No.

Screw in type IHF-5-T-20
Flow rate adjusting
Welded Type IHF-5-E-20

N
screw
31.8 50.8

For dimensions, components, and other de-

tails, see the IP pump piping flange kits on
70 ±0.2

pages C-10 and C-11.

O IN flange
Screw-in type IH03J-100120
φ 40
4-M12x23
Welded type IH03J-200120 36 ±0.2

B-30
Double Pump
VDC-11B-*A*-*A*-20

Pressure 259 51 MAX 113 92

adjusting screw
85 143 101 130
14 143 Rc 1/4 M113
Rc 1/4
(DR)

φ 19.05 –0.021
(DR) 14 M90

φ 95.02 –0.04
4

21.15 –0.2
4– φ 11hole

0
0
12

0
25

MAX 120

Vane Pumps
+0.024

77.5
4.76 +0.012

53
Flow rate
adjusting screw

2-Rc 3/4 2-Rc 1/2

C
(IN) (OUT)
143 22.5

VDC-12B-*A*-*A*-20

Pressure
D
adjusting screw 318 60 MAX139.5 130
107

φ 25.4 –0.021
145 158
130 14 174 28 4 85 4.76
+0.024

0
Rc 1/4 (DR)

27.7 –0.1
E
+0.012
(IN-OUT Rc 1/4 (DR) 16 150

0
port dimension) (IN-OUT port dimension)

MAX119
Flow rate adjusting
screw
40
93

77
φ 135 –0.04
F
0
Rc 3/4
Rc 1 (IN) (OUT)
Rc 3/4 (IN) 182 42.5 M124 ±0.2

G
Rc 1/2 (OUT) M150

VDC-22B-*A*-*A*-20

H
Pressure 369 60
adjusting screw 190.5 158
φ 25.4 –0.021

107 28 190.5 MAX 139.5 130

28 4 150
0

27.7 –0.1

Rc 1/4 (DR) Rc 1/4 (DR) +0.024

0

16 (IN-OUT port dimension) 4.76 +0.012

MAX 119

40 I
93

77
φ 135 –0.04
0

J
2-Rc
3/4 (OUT)
Flow rate 2-Rc 1 (IN) M124 ±0.2
adjusting screw 190.5 42.5 M150
4– φ13.5hole

VDC-13B-*A*-*A*-20 K
361 85
Pressure 218 128 6

L
adjusting screw 14 245
210 (IN-OUT port dimension) 23 Rc 3/8 (DR) 170 132
52.4 (OUT)

130 20 155
φ 31.75 –0.051

(IN-OUT port dimension) Rc 1/4 (DR) 85

70 (IN)

35.3 –0.2
0
0

2—17.5
MAX 119
MAX 113

M
0
116

7.938 –0.015
48
75
φ 127 –0.051
0
82

Flow rate
adjusting screw
Rc 3/4 (IN)
36 (IN)
26.2 (OUT)
Flow rate
adjusting screw
181
OUT
N
Rc 1/2 (OUT) 74.5 193 IN
φ 40 (IN) 4-M12x23 (IN)
φ 26 (OUT) 4-M10x18 (OUT)

Note) 1. VDC-**A has the foot mounting kit shown on page B-36 installed. O
2. Rc-* previously was PT*.

B-31
 Performance Curves Typical characteristics at hydraulic operating fluid kinematic viscosity of 32 mm2/s

VDC-1A(B)-1A3-20 VDC-1A(B)-2A3-20 VDC-2A(B)-2A3-20

1800min–1 Q 1800min–1
30
40
Q 1800min–1 Q
70

B 25
1500min–1
5 1500min –1
60
1500min –1
Discharge rate Q ℓ /min

Discharge rate Q ℓ /min

Discharge rate Q ℓ /min

30 6
20 4 50 10

Input Lin kW

Input Lin kW

Input Lin kW
Vane Pumps

5
Lin 40 8

B
15 3 Lin
20 4 Lin
30 6
3
10 –1 2 –1 –1
n
mi mi
n 20 mi
n 4
00
Drain rate DR

Drain rate DR
10 4 00 2 00

Drain rate DR
18 –1 18 6 18
–1 –1
5 4
in 1 n

C
m mi 1 10 4
mi
n 2
00 2
00 00
2 15 DR 15 DR 2 15 DR
0 0 0 0
1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
{10.2}{20.4} {30.6} {40.8} {51.0} {61.2} {71.4} {10.2}{20.4} {30.6} {40.8} {51.0} {61.2} {71.4} {10.2} {20.4} {30.6} {40.8} {51.0} {61.2} {71.4}
Discharge pressure P MPa{kgf/cm } 2 Discharge pressure P MPa{kgf/cm } 2 Discharge pressure P MPa{kgf/cm } 2

VDC-2A(B)-1A3-20 VDC-3A(B)-1A3-20 VDC-1A(B)-1A5-20

D 60
1800min–1 Q
120
1800min–1 Q 15
30
1800min–1 Q

1500min–1 1500min–1
50

Discharge rate Q ℓ /min

100 25
1500min–1
Discharge rate Q ℓ /min

Discharge rate Q ℓ /min

E 40 8 80 10 20 8
Input Lin kW

Input Lin kW

Input Lin kW
Lin
7
30
Lin
6 60 –1 15 6
Lin in
5 m
00

F 18
20 4 40 –1
5 10 –1 4
–1 n
mi
n in mi
Drain rate DR

Drain rate DR
Drain rate DR
Drain rate DR

6
0 3 m 0
80 00 180
1 15 –1
6

/min
10 –1 2 20 n 2
mi
4 5 4
0 min DR 4
00
2 150 1 2 DR
2 15 DR
0 0 0 0 10 0

G
1 2 3 4 5 6 7 1 2 3 4 5 6 7 0 3.5 7 10.5 14.0
{10.2} {20.4} {30.6} {40.8} {51.0} {61.2} {71.4} {10.2} {20.4} {30.6} {40.8} {51.0} {61.2} {71.4} {35.3} {71.4} {107.1} {142.8}
Discharge pressure P MPa{kgf/cm2} Discharge pressure P MPa{kgf/cm2} Discharge pressure P MPa{kgf/cm2}

VDC-2A(B)-1A5-20 VDC-3A(B)-1A5-20
1800min –1 Q

H
60 120 30
1800min–1
Q
1500min–1
50 100 25
1500min–1
Discharge rate Q ℓ /min
Discharge rate Q ℓ /min

80
Lin
40 16 20
Input Lin kW
Input Lin kW

I 30
Lin
14
12 60
–1
15
10 in
m
20 8 40 00 10
–1
18
Drain rate DR

i n –1
0m in
Drain rate DR

J
6
1 80 6 0 0m
10 4 –1
in 4 20 15 5
0m 4
2 150 DR 2 2 DR
0 0 0 0
3.5 7 10.5 14.0 3.5 7.0 10.5 14.0
{35.3} {71.4} {107.1} {142.8} {35.3} {71.4} {107.1} {142.8}

K
2
Discharge pressure P MPa{kgf/cm } 2
Discharge pressure P MPa{kgf/cm }

L Axial input at full cutoff

VDC-1 VDC-2 VDC-3

M 2.0 4 5
Axial input at full cutoff kW
Axial input at full cutoff kW

Axial input at full cutoff kW

4
1.5 3
–1
3 in
–1 –1
00m
1.0 min 2 min 18 –1

N
00 –1 00 –1 2 in
18 in 18 in 0 0m
0 0m 0 0m 15
0.5 15 1 15
1

0
0 3.5 7.0 10.5 14.0 0 3.5 7.0 10.5 14.0 0 3.5 7.0 10.5 14.0
{35.3} {71.4} {107.1} {142.8} {35.3} {71.4} {107.1} {142.8} {35.3} {71.4} {107.1} {142.8}

O Discharge pressure P MPa{kgf/cm }

2
Discharge pressure P MPa{kgf/cm }
2
Discharge pressure P MPa{kgf/cm }
2

B-32
Noise Characteristics

VDC-1 VDC-2 VDC-3

Measurement Position: 1 meter behind pump Measurement Position: 1 meter behind pump Measurement Position: 1 meter behind pump
80 80 80

–1
–1 1800min
Noise level dB(A)

Noise level dB(A)

Noise level dB(A)

1800min
70 70 70

B
–1 –1 At full cutoff
1800min 1500min
–1
At full cutoff 1500min At full cutoff
60 –1 60 60
1500min

Vane Pumps
50 50 50

B
0 3.5 7.0 10.5 14.0 0 3.5 7.0 10.5 14.0 0 3.5 7.0 10.5 14.0
{35.3} {71.4} {107.1} {142.8} {35.3} {71.4} {107.1} {142.8} {35.3} {71.4} {107.1} {142.8}
Discharge pressure P MPa{kgf/cm } 2
Discharge pressure P MPa{kgf/cm } 2
Discharge pressure P MPa{kgf/cm2 }

C
Cross-sectional Drawings
VDC-1A-*A*-20 D
VDC-2A-*A*-20
45 40
44 43 31 22 42 4 30 14 11 7 10 23 29 32 21 47 32 20 2 25 9 38 15 17 28 6 8 12
31 26 46
20
E
41 36
3 1
27
24
16 37
13
39 19 5 F
18
48
42
G

H
34 35 33
58 59 50 51 53 61 60 49 57 52 54 56 55
Seal Component Table (VDC-1*,VDC-2*)

Part
Applicable Pump Model No. VDC-1A-*-20 VDC-2A-*-20
Part No. Part Name
I
Seal Kit Number VCBS-101A00 VCBS-102A00
No. 37 Backup ring
Part Name Part Number Q'ty Part Number Q'ty
38 Cap
24
25
Oil seal
O-ring
TCV-224211-V
S85(NOK)
1
1
TCN-325211-V
NBR-70-1 G115
1
1
39
40
Snap ring
Screw J
26 O-ring AS568-034 1 AS568-150 1 41 Screw
42 Screw
27 O-ring AS568-026 1 AS568-134 1 Part No. Part Name Part No. Part Name
43 Screw (stopper)
28
29
O-ring
O-ring
NBR-70-1 P14
NBR-70-1 P22
1
1
NBR-70-1 P18
NBR-70-1 G35
1
1
1
2
Body (1)
Body (2)
19
20
Key
Pin
44
45
Screw
Plug
K
30 O-ring NBR-70-1 P20 1 NBR-70-1 G35 1 3 Cover (1) 21 Holder 46 Plug
4 Cover (2) 22 Holder 47 Pole
31 O-ring NBR-70-1 P5 2 NBR-70-1 P9 2

L
5 Shaft 23 Orifice 48 Nameplate
32 O-ring NBR-70-1 P6 4 NBR-70-1 P7 4 6 Ring 24 Oil seal 49 Valve body
33 O-ring NBR-70-1 P25 1 NBR-70-1 G35 1 7 Vane 25 O-ring 50 Spool
8 Plate (S) 26 O-ring 51 Holder
34 O-ring NBR-70-1 P22 1 NBR-70-1 G35 1
9 Plate (H) 27 O-ring 52 Plunger
35 O-ring NBR-70-1 P10A 1 NBR-70-1 P15 1
M
10 Piston (1) 28 O-ring 53 Spring
36 Backup ring VCB34-101000 1 VCB34-102000 1 11 Piston (2) 29 O-ring 54 Retainer
12 Bearing 30 O-ring 55 Screw
37 Backup ring VCB34-201000 1 VCB34-202000 1
13 Bearing 31 O-ring 56 Nut
57 O-ring NBR-70-1 P14 1 NBR-70-1 P14 1 14 Spring 32 O-ring O-ring
57
58 O-ring NBR-90 P6
Note) 1. Oil seals are manufactured by Nippon Oil Seal Industry Co.
3 NBR-90 P6 3 15
16
17
Thrust screw
Screw
Nut
33
34
35
O-ring
O-ring
O-ring
58
59
O-ring
Plug N
Ltd. (NOK). 60 Plug
2. The materials and hardness of the O-ring conform with JIS 18 Nut 36 Backup ring 61 Screw
B2401.
3. For VDR-*B-*-20, the seal kit number becomes VDBS-10*B00,
without the 33, 24, and 35 O-rings. O

B-33
 VDC-3A-1A*-20

40 41
30 34 35
39 38 29 21 5 27 14 12 8 28 17 32 7 11 22 27 21 29 16 18 2 13 42 24 25 10 15 1 9 13 23 33 3 19 6

B
Vane Pumps

C 37
36 26
4 31 43

D
20

E 54 53 45 46
56
44 48 52 47 49 51 50

F Part No. Part Name

33 Snap ring
34 Screw
35 Screw

G Seal Component Table (VDC-3*) 36 Screw

37 Screw
Applicable Pump Model No. VDC-3A(B)-*-20 38 Screw (stopper)
Part
Seal Kit Number VCBS-103B00 39 Screw
No. Part No. Part Name Part No. Part Name
Part Name Part Number Q'ty 40 Plug

H 23
24
Oil seal
O-ring
TCN-385811-V
NBR-70-1 G130
1
1
1
2
Body (1)
Body (2)
17
18
Nut
Nut
41
42
Washer
Nameplate
3 Mounting 19 Key 43 Pole
25 O-ring AS568-154(NBR-90) 1 4 Cover (1) 20 Pin 44 Valve body
5 Cover (2) 21 Holder 45 Spool

I
26 O-ring AS568-151(NBR-90) 1
6 Shaft 22 Orifice 46 Holder
27 O-ring NBR-70-1 G40 2
7 Ring 23 Oil seal 47 Plunger
28 O-ring NBR-70-1 P22 1 8 Vane 24 O-ring 48 Spring
29 O-ring NBR-70-1 P9 2 9 Plate (S) 25 O-ring 49 Retainer
10 Plate (H) 26 O-ring 50 Screw
J
30 O-ring NBR-70-1 P7 2
11 Piston (1) 27 O-ring 51 Nut
31 O-ring NBR-70-1 P7 2
12 Piston (2) 28 O-ring 52 O-ring
52 O-ring NBR-70-1 P14 1 13 Bearing 29 O-ring 53 O-ring
53 O-ring NBR-90 P6(NBR-90) 3 14 Spring 30 O-ring 54 Plug

K
15 Thrust screw 31 O-ring 55 Plug
Note) 1. Oil seals are manufactured by Nippon
16 Screw 32 Cap 56 Screw
Oil Seal Industry Co. Ltd. (NOK).
2. The materials and hardness of the
O-ring conform with JIS B2401.

B-34
VDC Series
Double Pump

10

4 7
9

2 5 6
8

1 3
B

Vane Pumps
B

F
Part No. Part Name
1 Body (2)
2
3
4
Body (3)
Shaft (S)
Shaft (H)
G
5 Joint
6 O-ring
7
8
O-ring
Screw H
9 Screw
10 Screw

I
Note) In the case of a double pump, use single
pump parts in addition to the 10 parts
listed above.

List of Sealing Parts J

Part VDC-11A-*-*-20 VDC-12A-*-*-20 VDC-22A-*-*-20 VDC-13A-*-*-20
Part Name
No. Part Number Q'ty Part Number Q'ty Part Number Q'ty Part Number Q'ty
6 O-ring − NBR-70-1 G60 1 NBR-70-1 G60 1 − K
7 O-ring NBR-70-1 G85 1 NBR-70-1 G45 1 NBR-70-1 G60 1 NBR-70-1 G85 1
Note) 1. See the description of the single pump for seal parts that are not included in the list.

L
2. The materials and hardness of the O-ring conform with JIS B2401.

B-35
 Foot Mounting Installation Measurement Chart
For VDC-11A, VDC-12 and VDC-22 (for double pump)

B
Vane Pumps

E For VDC-3A and VDC-13A

J Foot Mounting Applicable Pump Accessories Dimensions mm

Kit Model No. Model No. Bolt Q'ty Washer Q'ty A B C E F H

K
VDC-1
VCM-11-20 TH-10×30 4 WS-B-10 4 171.45 204 107.95 1  95.25 150
VDC-11

VDC-2
VCM-22-20 VDC-12 TH-12×35 4 WS-B-12 4 235 267 139.7 1 127 193

L
VDC-22

VDC-3
IHM-45-10 TB-16×40 2 WP-16 2 295.3 334 152.4 1 139.7 203
VDC-13

M Foot Mounting
Kit Model No. (I) (J) K N P Q
Dimensions mm
S T U φD φ d1 φ d2 φ d3 φ d4
Weight
kg

VCM-11-20  66.5 33 18 18 M10 180 32.5 50  90  95.02 22 11 − 40  6.5

N
VCM-22-20  84.5 40 20 20 M12 232 44.5 57.5 124 135 22 14 − 40 12.0
IHM-45-10 104.5 60 25 25 M16 259 44.5 61 − 127 35 18 181 86 13.5

B-36
 Uni-pump Specifications (CE mark standard compliant)
Single Pump Double Pump

UVC – 1 A – 2 A 2 – 1.5 – 4 – 40 UVC – 11 A – 2 A 2 – 2 A 2 – 3.7 – 4 – 40

Design number
Design number

B
Number of motor poles: 4(P)
Number of motor poles: 4(P)
Motor output (kW) Motor output (kW)
0.75, 1.5, 2.2, 3.7 1.5, 2.2, 3.7

Vane Pumps
Pressure adjustment range Shaft side pump pressure adjustment range

B
2: 1.5 to 3.5MPa 2: 1.5 to 3.5MPa
{15.3 to 35.7kgf/cm2} {15.3 to 35.7kgf/cm2}
3: 2.0 to 7.0MPa 3: 2.0 to 7.0MPa
{20.4 to 71.4kgf/cm2} {20.4 to 71.4kgf/cm2}
4: 5 to 10.5MPa Shaft side pump flow rate characteristics
{51 to 107kgf/cm2}

Flow characteristics A: Constant discharge type

A: Constant discharge type
Shaft side pump ring size
C
None : 30ℓ/min
Ring size at 1800min-1
2 : 40ℓ/min
None : 30ℓ/min

D
at 1800min-1 Head side pump pressure adjustment range:
2 : 40ℓ/min
A: Foot type mounting Same as the shaft side pump
Head side pump flow rate characteristics
Pump size 1: VDC–1B(20D)
A: Constant discharge type
2: VDC–2B(20D)
Head side pump ring size

E
Pump Type: VDC Series Uni-pump
None : 30ℓ/min
at 1800min-1
2 : 40ℓ/min
A: Foot type mounting
Pump size 11: VDC–11B(20D)
Pump Type: VDC Series Uni-pump
F

Specifications G
Maximum Working Maximum Flow Rate ℓ/min (A*) Maximum Flow Rate ℓ/min (2A*)
Model No. Pressure
MPa{kgf/cm2} 50Hz 60Hz 50Hz 60Hz
UVC- 1A
UVC- 2A
7 {71.4}
7 {71.4}
25
45
30
54
33
58
40
70
H
UVC-11A 7 {71.4} 25-25 30-30 33-33 40-40

Motor selection curves •Selecting a motor

I
70 The area under a motor output curve in the
graph to the left is the operating range for that
60 motor under the rated output for that motor.
J
Discharge rate Q ℓ/min

Example:
50
To find the motor that can produce pressure
40 of 3.5MPa and a discharge rate of 25.0 ℓ/min.

30
Selection Process
Since the intersection of the two broken lines K
3.7kW from a pressure of 3.5MPa and discharge rate
20
of 25.0 ℓ/min intersect in the area under the
2.2kW
2.2kW curve, it means that a 2.2kW motor
10 1.5kW
0.75kW
should be used. In the case of a double pump
configuration, select a motor that is larger
L
60Hz 50Hz 0 2 4 6 7 8 10 than the total power required by both pumps.
areas areas Discharge pressure P MPa

* Select a uni-pump that has a pressure and flow rate that is within the range of the drive so that the drive will not overload.
* When the startup current of the uni-pump becomes higher for the IE1 motor, breakers may need to be changed.
M

B-37
 Installation Dimension Drawings
UVC-1A
D
KL Rc3/4(IN) 116 L
91 MAX.113 Rc1/2(OUT on opposite side) 101 IL A
Hanging bolt 85 59
Hanging bolt Pressure adjusting screw M8

B
(3.7kW only) 130 22.5 O Motor rating plate
(IN-OUT port dimension) 14 (Terminal box side) Rotation direction plate
Rc1/4(DR)

MAX.120
Vane Pumps

Terminal box
I2(3.7kW only)

B terminal

53
I1
H
Flow rate Uni-pump

C -0.5
(Name sticker)
0
φKD adjusting screw M12
(Terminal box side)

C
(Round drain hole)
T
G

Pump model J F F

S
(nameplate) E E N
M View R: Mounting foot hole shape
I1

2.2kW
Electric drive conceptual diagram (4 locations)
R

D
I1

0.75,1.5kW
Electric drive conceptual diagram

Output
Motor Dimensions [mm] Frame Weight

E
Uni-pump kW
A IL C D E F G H I1 I2 J L M N S×T φ KD KL O No. kg
(4 poles)
UVC-1A-A2-0.75-4-40 137 105 80 152 62.5 50 4.5 160 193 − 47.5 242 165 130 25×10 27 137 65 80M 0.75 28.5
UVC-1A-A2-1.5-4-40
UVC-1A-A3-1.5-4-40 160.5 118.5 90 183 70 62.5 4.4 183 204 − 22 279 165 152.5 16×10 27 142 68 90L 1.5 31.5

F UVC-1A-2A2-1.5-4-40
UVC-1A-A2-2.2-4-40
UVC-1A-A3-2.2-4-40 179 133 100 206 80 70 7 203 226 − 39 312 206 170 14×12 27 153 83 100L 2.2 45.5
UVC-1A-2A2-2.2-4-40
UVC-1A-A3-3.7-4-40

G UVC-1A-A4-3.7-4-40
UVC-1A-2A2-3.7-4-40
199 140 112 233 95 70 10 228 253 242 24 339 214 164 14×12 27 182 90 112M 3.7 49.5

UVC-1A-2A3-3.7-4-40
1. Standard drive motor is the fully enclosed fan-cooled F type.

H
2. Standard voltage for drive motor is 200 VAC, 50/60 Hz or 220 VAC, 60 Hz.
3. Standard terminal box is B terminal (right side viewed from pump).
4. S
 ee page A-21 for the characteristics of the drive motor for the unipump (domestic standard 3 rating).

I UVC-2A
Hanging bolt D
(3.7kW only) KL Rc1(IN) 178.6 L
130 MAX.139.5 Rc3/4(OUT on opposite side) 158 IL A
107 98
Hanging bolt

J
150 42.5 Rc1/4(DR) O Rotation
(IN-OUT port dimension) 28 direction plate
MAX.119

Terminal box
I2(3.7kW only)

B terminal

K
77

Uni-pump
I1
H

(Name sticker)
(Terminal box side)
C -0.5
0

φKD
(Round drain hole)
Flow rate

L
adjusting screw M16
T
G

Pump model J F F
(nameplate) E E Motor rating plate N
S

M (Terminal box side)

I1

2.2kW View R: Mounting foot hole shape

Electric drive conceptual diagram R (4 locations)

M Motor Dimensions [mm]

Output
Frame Weight
Uni-pump kW
A IL C D E F G H I1 I2 J L M N S×T φ KD KL O No. kg
(4 poles)

N
UVC-2A-A2-2.2-4-40
179 133 100 206 80 70 7 203 226 − 39 312 206 170 14×12 27 153 83 100L 2.2 61
UVC-2A-A3-2.2-4-40
UVC-2A-A2-3.7-4-40
UVC-2A-A3-3.7-4-40
199 140 112 233 95 70 10 228 253 242 24 339 214 164 14×12 27 182 90 112M 3.7 65
UVC-2A-2A2-3.7-4-40

O UVC-2A-2A3-3.7-4-40
1. Standard drive motor is the fully enclosed fan-cooled F type.
2. Standard voltage for drive motor is 200 VAC, 50/60 Hz or 220 VAC, 60 Hz.
3. Standard terminal box is B terminal (right side viewed from pump).
4. S
 ee page A-21 for the characteristics of the drive motor for the unipump (domestic standard 3 rating).

B-38
UVC-11A
Pressure adjusting
D screw M8 259 L
KL 244 IL A
92 MAX.113 202 O
Hanging bolt 85 165.5 Rc1/4(DR)
Hanging bolt Rotation
(3.7kW only) 130 157
(IN-OUT port dimension) 101 Motor rating plate direction plate
59 (Terminal box side)
22.5
Uni-pump B

MAX.120
Terminal box (Name sticker)
I2(3.7kW only)

B terminal (Terminal box side)

53

Vane Pumps
I1
H
B

C -0.5
Flow rate adjusting

0
φKD
screw M12
(Round drain hole)
Rc3/4(IN) T
Rc1/2(OUT on opposite side)

G C
Pump model J F F
14

S
(nameplate) E E N
I1

M 2.2kW View R: Mounting foot hole shape

Electric drive conceptual diagram
R (4 locations)
I1

1.5kW
Electric drive conceptual diagram

D
Motor Dimensions [mm] Frame Output Weight
Uni-pump kW
A IL C D E F G H I1 I2 J L M N S×T φ KD KL O No. (4 poles) kg
UVC-11A-A2-A2-1.5-4-40
UVC-11A-A2-A3-1.5-4-40 160.5 118.5 90 183 70 62.5 4.4 183 204 − 22 279 165 152.5 16×10 27 142 68 90L 1.5 42 E
UVC-11A-A3-A3-1.5-4-40
UVC-11A-A2-A2-2.2-4-40
UVC-11A-A2-A3-2.2-4-40

F
179 133 100 206 80 70 7 203 226 − 39 312 206 170 14×12 27 153 83 100L 2.2 56
UVC-11A-A3-A3-2.2-4-40
UVC-11A-2A2-2A2-2.2-4-40
UVC-11A-A2-A2-3.7-4-40
UVC-11A-A2-A3-3.7-4-40

G
UVC-11A-A3-A3-3.7-4-40 199 140 112 233 95 70 10 228 253 242 24 339 214 164 14×12 27 182 90 112M 3.7 60
UVC-11A-2A2-2A2-3.7-4-40
UVC-11A-2A2-2A3-3.7-4-40
1. Standard drive motor is the fully enclosed fan-cooled F type.
2. Standard voltage for drive motor is 200 VAC, 50/60 Hz or 220 VAC, 60 Hz.
3. Standard terminal box is B terminal (right side viewed from pump).
4. S
 ee page A-21 for the characteristics of the drive motor for the unipump (domestic standard 3 rating). H

B-39