1
3/2 Hydraulic Operated Cartridge
Directional Control Valves
SD6H-A4
HA 4053
03/2012
SD6H-A4 / -
3/2 Hydraulic Operated Cartrige
Directional Control Valves
Functional symbols
Refer to the table with functional symbols
Cracking pressure
6 10 - 60 bar
13 35 -130 bar
Seals
No designation Standard (NBR)
V Viton ( FPM)
Ordering Code
X
Y
4 2
3
X
Y
4 2
3
Functional Symbols
Designation Symbol Interposition
2D26
HEX 6
HEX 24
HEX 6
HEX 27
SD6H-A4/2D26-6
SD6H-A4/2D29-13
X
Y
4 2
3
X
Y
4 2
3
X
Y
4 2
3
Designation Symbol Interposition
2D29
The valve is used for distributing the liquid in the hydraulic
circuits using a slide. The slide moves in a steel housing
and is adjusted by the pressure of the working fluid acting
on the front surface of the slide (X). The pressure requi-
red to changeover the slide is adjustable by pressing the
spring adjusting screw. The transfer of the force exerted
by the spring to the slide through hardened steel ball in
the axis of the motion greatly reduces the effect of radial
forces on the slide and its jamming in the housing. The
slide allows interconnection of the centre channel (S) with
one of the outer channels (P, T). The valve is available in
two interconnecting versions. In the SD26 interconnecti-
on and with the slide in the intermediate position all three
channels are interconnected, and in the interconnection
2D29 the channels are separated. The liquid from the area
is drained by an external spring outlet (Y) and thus cannot
influence the magnitude of the set pressure.
In basic version the valve body and the setting screw are
zinc coated.
Hydraulic operated cartridge valve
Two position valves
Two pressure ranges required for shifting
Adjusting of the pressure needed for shifting
External Drain of spring Aren - stable setting
3/4-16 UNF • pmax 350 bar • Qmax 30 L/min
2
HA 4053
Cartridge thread 3/4-16 UNF - 2A
Cavity number (see datasheed HA 0029) 288010
Maximum flow L/min 30
Max. pressure at ports P, T, S bar 350
Cracking pressure
bar
6 13
10 - 60 35 - 130
Pressure drop bar viz ∆p-Q Characteristic
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range for standard sealing (NBR) °C -30 ... +100
Fluid temperature range for Viton sealing (FPM) °C -20 ... +120
Viscosity range mm
2
/s 10 .... 400
Maximum degree of fluid contamination Class 21/18/15 according to ISO 4406 (2006)
Weight kg 0,210
Valve tightening torque Nm 30+2
Nut tightening torque Nm 10
Mounting position optional
Technical Data
∆p-Q Characteristic Measured at n = 32 mm
2
/ s
Caution!
0 2 4 6 8 10 12 14 16 18 20 22 24 25
2
4
6
8
10
12
14
16
1
Flow Q [L/min]
Pressure drops ∆p [bar]
• The packing foil is recyclable.
• The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should
not be construed in any case as a guaranteed representation of the product properties in the sense of the law.
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
tel.: +420-499-403111, fax: +420-499-403421
e-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
Subject to alteration without notice !
Connection Direction
1 2D26 P→S
1 2D26 S→T
1 2D29 P→S
1 2D29 S→T
