SEQUENCE VALVE WITH CHECK VALVE / COUNTER BALANCE VALVE（HQ，HB）■Features
These valves are used to control the operating sequence of the hydraulic circuit (sequenceoperation) by controlling the pilot pressure, to hold the load, or to prevent a device fromfalling under its own weight (counterbalance operation).
● Sequence valves are classified into three types, namely the internal pilot type, the externalpilot type and the internal/external pilot type, according to the source of the pilot pressure,and counterbalance valves into two types, namely the internal pilot type and the externalpilot type.

■Description of the model designationB

HQ2ｰDG2（E）Kｰ02（A）

PRESSURE CONTROL VALVES

Model No.
Nominal size
With check valve
Pilot type
No code … Internal pilot
E … External pilot
B … Internal/external pilot
Pressure adjustment range 1: 0.3 to 0.85 MPa
2: 0.5 to 1.75 MPa
3: 0.85 to 3.5 MPa
4: 1.76 to 7 MPa
5: 3.5 to 14 MPa (also available)
6: 10.5 to 21 MPa (also available.)
Piping method G: Gasket type T: Rc (PT) thread typeConstruction

D: Direct typeMax. operating pressure

2: 14 MPa 3: 21 MPa

HQ: Sequence valve
HB: Counter balance valve

Sequence valve with internal pilot type check valve
IN

Nominal size

Rated flow rate(L/min)

02

OUT DR

503

3506

120

Max. operating pressure
(MPa)

Model

HQ2ｰDG*Kｰ02A

1421Gasket joint typeThread joint type

HQ3ｰDT*Kｰ03

HQ3ｰDG*Kｰ03

HQ3ｰDT*Kｰ06

HQ3ｰDG*Kｰ06

Sequence valve with external pilot type check valve
IN

Nominal size

02

PLTOUT DR

Rated flow rate(L/min)

503

3506

120

Max. operating pressure(MPa)Model

HQ2ｰDG*EKｰ02A

1421

Gasket joint type

Thread joint type

HQ3ｰDT*EKｰ03

HQ3ｰDG*EKｰ03

HQ3ｰDT*EKｰ06

HQ3ｰDG*EKｰ06

Sequence valve with the internal, external pilot type check valve
INPLT

Nominal size

Rated flow rate
(L/min)

03

3506

120

Max. operating pressure
(MPa)

21

Model
Thread joint type

Gasket joint type

HQ3ｰDT*BKｰ03

HQ3ｰDG*BKｰ03

HQ3ｰDT*BKｰ06

HQ3ｰDG*BKｰ06

Please note that this type has not the pressure adjustment range of 1: 0.3 to 0.85 MPa.
OUT DR

Pilot pressure ratio of internal, external pilot type sequence valve

Nominal size

0306

B−20

Pilot pressure ratio (Note)
Pressure adjustment range code
2 to 45 to 6

1/10
1/10

1/18
1/16.5

NOTE: The pilot pressure ratio is the ratio of externalpilot pressure relative to the internal pilotpressure.

Counter balance valve
Internal pilot
INMax.
operatingpressure(MPa)

Ratedflow rate(L/min)

Nominalsize

03

3506

120

21

Model
Internal pilot type
Gasket joint type
Thread joint type

External pilot type
Thread joint type
Gasket joint type

HB3ｰDT*Kｰ03

HB3ｰDG*Kｰ03

HB3ｰDT*EKｰ03

HB3ｰDG*EKｰ03

HB3ｰDT*Kｰ06

HB3ｰDG*Kｰ06

HB3ｰDT*EKｰ06

HB3ｰDG*EKｰ06

OUT

B

External pilot
IN

PRESSURE CONTROL VALVESPLTOUT■Outside dimensions
HQ3ｰDT**Kｰ**
HB3ｰDT*Kｰ**
Pressure Adjustment Screw
Lock nut
2−Rc1/4
Size 03：Rc1/8

DGR

F

H

C Max.

E

3−RcQ

A

Pressure gauge outlet
Rc1/4

B

JK

L
N

NOTE: Counter balance valve has the internal drain.
Unit: mmModelA

BCDEFGH

JKL

NQ

R

Mass (kg)H*3ｰDT**Kｰ036296

18556095

1745.55662504898

3/8546.5

H*3ｰDT**Kｰ06

70110221

68.5

115.5

21.5

57.5

66.5

706354117

3/4586.5

B−21

■Outside dimensions
HQ3ｰDG**Kｰ**

HQ2ｰDG*（ E）（ K）ｰ02A

HB3ｰDG*Kｰ**
123
104.5
59.5
2−JIS B 2401−1AP96.5
Pressure adjustment screwIN

DR

PLT

402896Lock nutDR

Parentheses indicate an application without the check valve.

IN PLTF

SHQ02ｰ02T1KD

2−M6, depth 13EA15 13
10 32−φ9φ14 counter bore depth 0.52−φ32−φ5DR2811IN
For the sub-plate SHQ**ｰ**T1（A）, refer to page B-19.

OUT

9 615 157090

Rc1/4

2−JIS B 2401−1AP9（O-ring）

2−M6OUT
GL

7（8） 64（43）1840（19）Ｂ
C Max.

H−MJ

2−φN

PRESSURE CONTROL VALVES

２−Q（O-ring）
２−P（O-ring）

Pressure adjustment screw

OUT

7 10 330 10B

Lock nut（O-ring）

PLT

1017 1760

4−Rc1/4

1828

Mass: 5.5kg

SHQ02ｰ02T3, refer to page L-5.
Unit: mmModelA

B

CDEFGHJKLN

PQMass (kg)H*3ｰDG**Kｰ0388151185866743434101566JIS B 2401ｰ1AP21

JIS B 2401ｰ1AP114.5

H*3ｰDG**Kｰ0610218422198805060

4101566JIS B 2401ｰ1AG30

JIS B 2401ｰ1AP165.5B−22