VRG- □□Reducing valve
Pressureadjustment
screw

Rod30MPa

Internal ﬁlter

Special check valve
Internal ﬁlter

CYL.

P(R)

(Secondary side)(Primary side)

Internal hydraulic presCYL. hydraulic port
Secondary side
hydraulic pressure

Reducing valve model VRG

sure of circuit can bepartially reduced.

P(R) hydraulic port

This is a non-leak typePrimary side
hydraulic pressurethat requires no drain.

Specifications
Model
Mounting, piping methods

VRG-MG

VRG-MT

VRG-MS

VRG-HG

VRG-HT

VRG-HS

Manifold

Piping

VHD linking

Manifold

Piping

VHD linking

Primary side hydraulic pressure rangeMPa7‒3010‒30

Secondary side hydraulic pressure rangeMPa1‒207‒27

Allowable min. differential pressure

MPa3

Proof pressure

MPa

37.5

Pressure change per revolution

3.9

MPa/rev

Orifice area
Operating temperature

6.2mm 2

28.1℃

0‒70
General mineral based hydraulic oil (ISO-VG32 equivalent)Fluid used
Mass

1.0 (0.9 only for manifold type)kg● Fluorocarbon has been adopted for seal sections where cutting fluid is applied, as a measure for the use of chlorine-based
cutting fluid (this is not thermal resistant specification).
● Avoid overpressure to CYL. hydraulic port of the valve if there is a risk of back pressure in secondary circuit.
：The setting should be performed so that the differential pressure between primary side hydraulic pressure and secondary side
hydraulic pressure may exceed 3 MPa. (Example：When VRG-H, if primary side hydraulic pressure is 25 MPa, secondary side
hydraulic pressure should be from 7 to 22 MPa.)

indicates made to order.

45

Locknut M8

Mounting details

Max. ø 6CLY. hydraulic port

17119

1168

17P(R) hydraulic port
(primary side)
O-ring P9(ﬂuorocarbon hardness Hs90)

Hydraulic pressure

2-M839VRG

CYL. hydraulic port
(secondary side)
O-ring P9(ﬂuorocarbon hardness Hs90)

22.5

19.5
39

33
6.8

Mounting hole2- ø92233

Hydraulic pressure(68)

Secondary side hydraulicpressure adjustment screw
M8×1.2528

ø37.5

With internal filter (P & CYL. hydraulic ports)
Min. 6

VRG-□G Manifold mounting

Max. 18

Reducing valve

Dimensions

918
11918

20

31

7(45)

Max. ø6P(R) hydraulic port

For manifold piping, the mounting
surface finish must be no rougher
than Rz6.3 (ISO4287:1997).

162

VRG- □□

Reducing valve

30MPaDimensions

Secondary side hydraulicpressure adjustment screw
M8×1.25

ø37.5

45

Max. 18

With internal filter (P & CYL. hydraulic ports)

Min. 6

VRG-□T Piping mounting

Locknut M8P(R) hydraulic port
(primary side)
Rc1/4

CYL. hydraulic port
(secondary side)
Rc1/4

68

39

Mounting hole2- ø922224339119

Mounting hole2-ø9

Arrow A view

7313145

6.8

VRG-□S VHD linking

6.822.5

19.57↑A

With internal filter (P & CYL. hydraulic ports)

VHD linking measurement

VRGVHD

Coupling valve
model VHD-HGB

90

110 when clamping(138 when unclamping)

15

Reducing valve
model VRG-□S

CYL. BP(R)

Reducing valve

45

Max. 18

Secondary side hydraulicpressure adjustment screw
M8×1.25

ø37.5

Min. 6

CYL. A

CYL. B hydraulic port
(secondary side)
Rc1/4

ø6 holeP(R) hydraulic port
(primary side)

CYL. A hydraulic port
(primary side)
Rc1/4

6839

Mounting hole2- ø9222235.54339119

Mounting hole2-ø9VRG

Locknut M8

6.8

19.5
22.5

22.5
7

31

31
456.8

● Structure is such that when pressure on secondary side (lowpressure side) drops due to temperature change or oil leak,flow channel to primary side (high pressure side) is opened
to replenish oil until pressure reaches set pressure.

Arrow B view

7

↑B
● Pressure is not supplemented when primary side is separated
from hydraulic pressure source.
● Mounting screws are not included.

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