Solenoid Controlled Relief Valves (High Pressure Type)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. This valve is able to adjust pressure up to maximum 35 MPa.

■ Specifications
Model Numbers

Max. OperatingPres.
MPa

Pres. Adj. RangeMPa35★ - 35

B3SG−03−＊−＊−＊−＊−10
B3SG−06−＊−＊−＊−＊−10Max. FlowL/min250500★ For minimum adjustment pressures and other characteristics, see page C-15.

■ Approx. Mass
Model Numbers

Double Sol.

Single Sol.

With Vent Restrictor

B3SG−03

6.0 kg

5.5 kg

6.6 kgB3SG−06

7.0 kg

6.5 kg

7.6 kg■ Model Number Designation
A−
With Vent★1
Restrictor

B3S

G

Series Number

Type ofMounting

B3S：Solenoid
Ａ：With Vent
Controlled
Restrictor
Ｇ：Sub-plate
ReliefValves(Option) (Omit
Mounting
if not required) (High Pressure
Type)−03−Ｖ−2B3AHigh Venting★2
Valve Size
Vent Type★3
Pres. Feature0306

Ｖ：For HighVentingPressureFeature(Omit if notrequired)

2B3A
2B3B
2B2B
2B2
3C2
3C3−A100−Ｎ−10Coil Type★4

Type ofElectrical Con.

DesignNumberAC：
A100, A120
A200, A240
DC：
D12 , D24
D48
AC→DC Rectified：
R100 , R200

None:
Terminal
Box Type
Ｎ：WithPlug-inConnector(DIN)(Option)1010★1. Models with vent restrictor are applicable only for the vent type 2B3A and 2B3B. For details, see page C-23 “Option”.
★2. Use high venting pressure types to reduce changeover time from unloading to onloading.
★3. The details of the vent types are the same as for solenoid controlled relief valves BST/BSG. See page C-18 “Vent Types”.
★4. The coil codes are the same as for solenoid operated directional valve DSG-01. See the Solenoid Ratings on page C-52.

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.

■ Accessories■ Sub-plates● Mounting Bolts
Valve ModelNumbers
B3SG−03
B3SG−06

Socket Head Cap Screw
M12×40L …… 4 Pcs.
M16×50L …… 4 Pcs.

■ T y p e o f E l e c t r i c a l C o n d u i tConnection

Electrical conduit connection is same assolenoid operated directional valve DSG-01.
For details, see page C-51.

C-22

Valve ModelNumbers
B3SG−03
B3SG−06

Sub-plate Model Numbers
BGM−03−20
BGM−03X−20
BGM−06−20
BGM−06X−20

Thread Size
3／81／
23／
41

RcApprox. Masskg
2.4
3.1
4.7
5.7

● 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 machinedfinish. (1.6 )● The sub-plates are those for pilot operated relief valves. For dimensions, see page C-9.

Solenoid Controlled Relief Valves(High Pressure Type)PRESSURE CONTROLS■ Instructions● When control in the vent circuit, 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 7 MPa. Afteradjustments, 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.

● Models with Vent Restrictor
The type with a vent restrictor has a vent restrictor in vent types
2B3A and 2B3B added between a relief valve and a solenoidoperated 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−B3SG−＊−2B3Bbb

Valve Size

Min. Flow03

8 L/min06

Mounting Surface
B3SG−03：ISO 6264−06−09−1−97
B3SG−06：ISO 6264−08−13−1−97

B3SG−03, 06

Fully Extended 167.5
Fully ExtendedWF

D"K" Dia. Through"N" Dia. Spotface
4 Places

Pressure Port “P”

BA★ Pressure is limited by collars fitted. If a workingpressure cannot be attained, remove some collars. Onecollar is equivalent to 14 MPa.

Tank Port “T”

Manual Actuator
6 Dia. Through (Both Ends)

Pressure Gauge Connection
Rc 1/4 Thd.

69077

Two Collars★
Lock Nut
14 Hex.
Mounting Surface(O-Rings Furnished)

Locating Pin
6 Dia.

SOL a

SOL b

44 Dia.

Pressure Adjustment
INC.
HandleRemote Control Port
“B” Rc 1/8 Thd.

Space Needed to Remove
AC :45.5 Solenoid-Each End
DC/R :50

DC,R:204.7 AC:200.7
DC,R:204.4 AC:196.4
DC,R:102.2
47.5
AC:98.2

VQPJH

1346Vent Port “V”

Electrical Conduit Connection
G 1/2 Thd. (Both Ends)

T

187.8
169.5
122.5

Remote Control Port“A” Rc 1/8 Thd.

CC

A−B3SG−＊−2B3AHigh Pressure Type■ Option

UModel Numbers

ＡＢ

Ｃ

ＤＥ

Ｆ

Ｈ

ＪＫＮ

Ｐ

Ｑ

ＴＵ

Ｖ

W

B3SG−03

76

53.8

11.1

26.9

53.8

74.6

36.6

29.3

13.5

2127.9

19.1

21.5

111

31.2

53.8

B3SG−06

100

70

15

35

66.7

63.8

47.4

43.7

17.5

27

38.7

29.9

26125

22.3

66.7

Note: For dimensions of the valve mounting surface, see the dimensional drawing (page C-9) of the sub-plate used together.
Models with Vent Restrictor (Option)

A−B3SG−03, 06

Models with Plug-in Connector (Option)

B3SG−0306−＊−＊−＊−N

Cable Applicable:
Outside Dia. ...... 8-10mm
Conductor Area ...... Not Exceeding 1.5mm²
DC,R:204.4 , AC:196.4

AC:98.2 47.5
DC,R:102.2

Cable Departure

AC:175.5
DC:186.5, R:179.7
122.5

AC:187.8
DC:198.5, R:201.5

30

217.8
199.5
152.5

SOL b

Solenoid Controlled Relief Valves(High Pressure Type)

SOL b

SOL aC-23

■ List of Seals
B3SG−03, 06

313135358899161610107722
SOL b
SOL b

3030

SOL a
SOL a

181811111313151514141212232320202424232321
21
331155252522224433
33

1717663232

19
19

B3SG−03, 06
Item

Name of Parts

161718192021
22
23
24
25

O-RingO-RingO-RingO-RingO-RingO-RingO-RingO-RingBack-up Ring
Back-up Ring

Part Numbers
B3SG−03
B3SG−06
OR NBR-70-1 P9-N
OR NBR-70-1 P9-N
OR NBR-90 P18-N
OR NBR-90 P28-N
OR NBR-90 P14-N
OR NBR-90 P14-N
OR NBR-90 P9-N
OR NBR-90 P11-N
AS568-123（NBR-90）
AS568-123（NBR-90）
AS568-025（NBR-90）
AS568-025（NBR-90）
AS568-024
AS568-024（NBR-90）（NBR-90）
AS568-012（NBR-90）
AS568-012（NBR-90）
SO-BRB-34
SO-BRB-34
SO-BRB-32
SO-BRB-32

Note: The Pilot Valve for item ㉟, see “Solenoid Operated Directional Valves, DSG-01 Series” of thecatalogue “E: Directional Controls”.

A−B3SG−03, 06(Models with VentRestrictor)

474741414646393943434242373743434040454544443838SOL b
SOL b

SOL a
SOL a

A−B3SG−03, 06
Item4344

C-24

Name of Parts
O-RingO-RingPart Numbers
OR NBR-90 P14-N
OR NBR-90 P8-N

Solenoid Controlled Relief Valves(High Pressure Type)

Qty.
22

Qty.
1211111211