PRESSURE CONTROLSSolenoid Controlled Relief Valves
The solenoid controlled relief valve is a combination of a pilot operated relief valve and asolenoid operated directional valve. It is used for no-load pump operation by using electric
signals or, together with a remote control relief valve, for two or three pressure control of
the hydraulic system.

C■ Specifications
Model Numbers
ThreadedConnection

Sub-plate
Mounting

BST−03−＊−＊−＊−＊−48

BSG−03−＊−＊−＊−＊−48

BST−06−＊−＊−＊−＊−48

BSG−06−＊−＊−＊−＊−48

BST−10−＊−＊−＊−＊−48

BSG−10−＊−＊−＊−＊−4810025★ - 25200400

Solenoid Controlled Relief Valves

Max.
Pres. Adj. Max. Approx.
OperatingFlow MassRange
Pres.
kg
L/minMPa
MPa
See thechartbelow.

★F or relief valves, standard pilot operated relief valves are used.
For minimum adjustment pressures and other characteristics, see pages C-9 & C-10.
● For large flow valves (flange connection type), please contact us.

■ Approx. Mass
Model Numbers

Double Sol.

Single Sol.

With Vent Restrictor

BST−03

7.1 kg

6.6 kg

7.6 kg

BST−06

7.1 kg

6.6 kg

7.6 kg

BST−1010.8 kg

10.3 kg

11.3 kg

BSG−03

6.8 kg

6.3 kg

7.3 kg

BSG−067.7 kg

7.2 kg

8.2 kg

BSG−1011.0 kg

10.5 kg

11.5 kg■ Model Number Designation
A−BSＴ

With Vent★1
Restrictor

Series Number

Type ofMounting

Ａ：With Vent
Restrictor(Option) (Omit
if not required)

Ｔ：Threaded
Connection
BS：Solenoid
Controlled
ReliefValves

Ｇ：Sub-plate
Mounting

−03

−Ｖ

−2B3A

−A100−Ｎ−48★2
Valve Size High Venting
Vent Type★3
Pres. Feature

Coil Type★4

Type ofElectrical Con.

DesignNumber

None:
Terminal
Box Type
Ｎ：
With Plug-inConnector(DIN)(Option)

48

2B3A

03
06
1003
06

Ｖ：For High
VentingPressureFeature(Omit if notrequired)

2B3B
2B2B
2B2
3C2
3C3

10

★1. M
 odels with vent restrictor are applicable only for the vent type 2B3A and 2B3B. For
details, see page C-19.
★2. Use high venting pressure types to reduce changeover time from unloading to onloading.
★3. For the details of the vent types, see the following page.
★4. The coil codes are the same as for solenoid operated directional valve DSG-01. See theSolenoid Ratings on page C-52.

AC：

A100, A120
A200, A240
DC：

D12 , D24
D48
AC→DC Rectified：
R100 , R200

4848484848■ Low Noise Type Solenoid
Controlled Relief Valves
Low Noise Type Solenoid Controlled Relief
Valves are also available. For details, pleasecontact us.

RequestThe coil type numbers in the shaded column are handled as optional extras.
In case these coils are required to be chosen, please confirm the time of delivery with us before ordering.

Solenoid Controlled Relief Valves

C-17

■ Vent Types

Vent Type

Solenoid Operated
Directional Valve
Model Numbers

Graphic Symbols

OperationSOL“a”

A

DSG−01−2B3A

Connected to port "A".

ON

Connected to tank (no-load)

OFF

Connected to tank (no-load)ON

Connected to port "B".

OFF

Closed state (relief valvesetting pressure)ON

Connected to port "B".

OFF

Connected to port "A".

ON

Connected to port "B".

OFF

OFF

Closed state (relief valvesetting pressure)

ON

OFF

Connected to port "A".

OFF

ON

Connected to port "B".

OFF

OFF

Connected to tank (no-load)

ON

OFF

Connected to port "A".

OFF

ON

Connected to port "B".

——

Bb

2B3B

DSG−01−2B3B——

Bb

DSG−01−2B2B

2B2B

A——

Bb

DSG−01−2B22B2A

3C2abA

3C3Ba

DSG−01−3C2Bb

DSG−01−3C3■ Sub-plates● Mounting BoltsValve ModelNumbers

Socket Head Cap Screw

BSG−03

M12×70L…2 Pcs. M12×95L…2 Pcs.

BSG−06

M16×60L…2 Pcs. M16×80L…2 Pcs.

BSG−10

M20×70L…2 Pcs. M20×90L…2 Pcs.

■ Type of Electrical Conduit Connection
Type of electrical conduit connection is same as solenoid
operated directional valve DSG-01. For details, see page C-51.

C-18——■ Accessories
Valve ModelNumbers

Vent Connecting

OFFb

2B3A

SOL“b”

BSG−03
BSG−06
BSG−10Sub-plateModel Numbers
BGM−03−20

BGM−03X−20
BGM−06−20
BGM−06X−20
BGM−10−20
BGM−10X−20

Thread Size
Rc
3／8
1／2
3／
4

1

1 1／4
1 1／2

Approx.
Mass kg
2.4
3.1
4.7
5.7
8.4
10.3

● Sub-plates are available. Specify the sub-plate model number
from the table above. When sub-plates are not used, the mounting
surface should have a good machined finish. (1.6 )● The sub-plates are those for pilot operated relief valves. Fordimensions, see page C-9.

Solenoid Controlled Relief Valves

PRESSURE CONTROLS■ Option■ Instructions● If a remote control relief valve is used in the vent circuit, see pageC-3. In addition, if the internal volume of the vent line is too large,
chattering is likely to occur. Thus, as far as possible reduce the inside
diameter and the length of the pipe.
● To adjust the pressure, loosen the lock nut and turn the handle slowly
clockwise for higher pressures or anti-clockwise for lower pressures.
Pressure change of one handle revolution is about 5 MPa. After
adjustments, do not forget to tighten the lock nut.
● Piping of the tank line should not be connected to any tank line of theother valves, but connected directly to the reservoir.
● With a small flow, the setting pressure may be unstable. Use with theminimum flow rate as the below chart.

The type with a vent restrictor has a vent restrictor in vent types
2B3A and 2B3B added between a relief valve and a solenoid
operated directional valve. If prevents shock to the main circuit by
gradually lowering the venting pressure in the shift from the set
pressure to unloading.
Unloading pressure are the same as without a vent restrictor.
A−BS＊−＊−2B3A

A−BS＊−＊−2B3BbbValve Size

Min. Flow03

8 L/min06
10BST−03, 06, 10★1. Pressure is limited by collars fitted. If a working pressure cannot be
attained, remove some collars. One collar is equivalent to 10 MPa.
★2. There are two threaded connection pressure ports. They can beconnected each other in-line; one as inlet and the other as an outletor the valve can be used by plugging one of the pressure ports.

Position can be shiftedby 90° steps.

Space Needed to Remove Solenoid-Each End
AC :196.4
AC :45.5
DC/R :204.4
DC/R :50
47.5 AC :98.2
Electrical Conduit Connection
DC/R :102.2
47.5
G 1/2 Thd. (Both Ends)

Pressure Adjustment Handle

46INC.

BST−10F

H

JK

L

75

40

52

78

145

52

459085

5080

96151

80

60

120

A−BST−06

A−BST−10 301.8 194.5 147.5
For other dimensions, see
the above figure.

YZ

ｄ269.3 182.5 135.5

LNPS

TUV239.3 68.5 152.5

36105.5

6962271.849117.5817489Q

164.5

Models with Plug-in Connector (Option)
03
AC :196.4
BST−06−＊−＊−＊−N
DC/R :204.4
105151h

AC :98.2
DC/R :102.2

dA−BST−03

PESOL bＺ

S

D

Remote Control Port“A” Rc 1/8 Thd.

K

Pressure Gauge Connection
Rc 1/4 Thd.

C

Models with Vent
Restrictor (Option)
A−BST−03, 06, 10

Model Numbers Ｙ★2NameCoil
Typeｅｆ ｈ

AC Solenoid

A＊5365 39

DC Solenoid D＊

6476 39

R (AC→DC)
R＊Solenoid

57.2 79 53

SOL aX
3／83／41 1／4

Cable Departure
Cable Applicable:Outside Dia. ..... 8-10mm
Conductor Area .....
Not Exceeding 1.5mm²eBST−03

Pressure Port
Rc “X” Thd.
2 PlacesfE
Fully Extended H

BST−06

V★1F

Model Numbers

TRemote Control Port“B” Rc 1/8 Thd.

Two Collars

JTank Port
Rc “X ” Thd.

Q

44 Dia.

Vent Port
Rc 3/8 Thd.

Manual Actuator
6 Dia. Through

SOL b

SOL a

N

Lock Nut
14 Hex.

U“C” SQ.

Solenoid Indicator LightD

15 L/minC
Solenoid Controlled Relief Valves● Models with Vent Restrictor

SOL b

For other dimensions, see the above figure.

Solenoid Controlled Relief Valves

C-19

Mounting Surface
BSG−03：ISO 6264−06−09−1−97
BSG−06：ISO 6264−08−13−1−97
BSG−10：ISO 6264−10−17−1−97

BSG−03, 06, 10
Solenoid Indicator Light“C” SQ.

★ Pressure is limited by collars fitted. If a working pressure cannot
be attained, remove some collars. One collar is equivalent to 10MPa.
Space Needed to Remove Solenoid-Each End
AC :196.4
AC :45.5
DC/R :204.4
DC/R :50
47.5 AC :98.2
DC/R :102.2
Electrical Conduit Connection
47.5
G 1/2 Thd. (Both Ends)

Mounting Surface(O-Rings Furnished)D46

Pressure Adjustment
HandleTwo Collars★

Manual Actuator
6 Dia. Through

INC.

VVent Port

Q

Pressure Gauge Connection
Rc 1/4 Thd.

6

Pressure Port

aEPU

S

Remote Control Port
“B” Rc 1/8 Thd.

TLock Nut
14 Hex.

Locating Pin
6 Dia.

Remote Control Port“A” Rc 1/8 Thd.

SOL b

X

44Dia.

SOL a"Y" Dia. Through"Z" Dia. Spotface
4 Places

K

Tank Port

Lb

NF
H

Fully Extended J

Model Numbers Ｃ

ＤＥＦＨ

ＪＫＬＮＰ

Ｑ

ＳＴＵＶＸＹＺａｂBSG−037540577878

145

14.14182

225.8

77

130.5

2283.5

47

40

13.5

2155

77

BSG−06

75

4040

60

78

145

1752

104 249.8 83.5

148

4.5

101

64.5

57.5

17.5

2638

58

BSG−1085

45

4767

84

146

20.7

62

124 283.8 110 155.5

6108.5

72

65

21.5

3245

65

Note :For dimensions of the valve mounting surface, see the dimensional drawing (page C-9) of the sub-plate used together.
Models with Plug-in Connector (Option)
03
BSG−06−＊−＊−＊−N10

AC :98.2
DC/R :102.2

AC :196.4
DC/R :204.4
5151
neh

SOL b

Cable Departure
Cable Applicable:
Outside Dia. ..... 8-10mm
Conductor Area .....
Not Exceeding 1.5mm²SOL bdf

SOL ajModels with Vent Restrictor (Option)
A−BSG−03, 06, 10

Model Numbersｄｅｆ

A−BSG−03

255.8

160.5

113.5

A−BSG−06

279.8

178

131

A−BSG−10

313.8

185.5

138.5

For other dimensions, see the above figure.

C-20NameCoil Typeｈｊｎ

AC Solenoid

A＊536539

D＊647639

R＊57.27953

DC Solenoid
R (AC→DC) Solenoid

For other dimensions, see the above figure.

Solenoid Controlled Relief Valves

PRESSURE CONTROLS■ List of SealsBST−03, 06, 10BSG

BST−03, 06, 10810121371514

Name ofParts

21O-Ring

OR NBR-70-1 OR NBR-70-1 OR NBR-70-1
P9-N
P9-N
P9-N

124O-Ring

OR NBR-90 OR NBR-90 OR NBR-90
P32-N
P32-N
P32-N

1BST-03

BST-06Qty.

BST-101119

BSG−03, 06, 102Item

Name ofParts

21O-Ring

OR NBR-70-1 OR NBR-70-1 OR NBR-70-1
P9-N
P9-N
P9-N

122O-Ring

OR NBR-90 OR NBR-90 OR NBR-90
P9-N
P11-N
P9-N

123O-Ring

OR NBR-90 OR NBR-90 OR NBR-90
P18-N
P28-N
P32-N

224O-Ring

OR NBR-90 OR NBR-90 OR NBR-90
P32-N
P32-N
P42-N

122216932425204523

1BST−03, 06, 10BSG(Models with Vent Restrictor)
37

29

1830

40

BSG-06

Qty.

BSG-10Note: The Pilot Valve for item , see “DSG-01 Series Solenoid
Operated Directional Valves” of the catalogue “E: DirectionalControls”.

A−41

Part Numbers
BSG-03CSolenoid Controlled Relief Valves

27Part Numbers

Item

35

BST−03, 06, 10A− BSG

28ItemName of Parts

Part Numbers

Qty.

38O-Ring

OR NBR-90 P8-N

240O-Ring

OR NBR-90 P14-N

23640
38

Solenoid Controlled Relief ValvesC-21