1
SR4E2-B2
P
T
1
2
1
2
Solenoid Controlled Pilot
Operated Pressure Relief Valve
HA 5068
6/2014
Replaces
HA 5068 3/2013
Functional Description
The valve is used as integrated double functional valve
for unloading the flow passage and when energized by
electrical signal it lock the flow passage and allows to
set the relief pressure in hydraulic circuit. Pressure
level is manually adjustable on the valve.
Valve is of pilot operated design and thus suitable for
operation of high hydraulic powers.
The valve consists of a control (pilot) valve and the main
stage valve. The main stage is a spool valve, control
valve is a poppet valve.
Setting of the upper pressure limit is achieved with
energized solenoid using the screw pos.1. Setting of
the lower pressure limit is achieved with switched off
solenoid using the screw pos. 2. Port P, where the
pressure is controlled, is connected by orifices (5) and
(6) to the pilot valve. The hydraulic fluid is drained by
the main valve body radial holes (2) to port T.
When the valve is closed, the pressure affects the face
of the spool (3) and simultaneously through orifice
(5) to the other side loaded by the spring (4) and then
through the orifice (6) to the cone (8) of the pilot valve.
The control cone (8) creates a variable resistance
against the seat (7). When the increasing pressure in
the system reaches the values preset by the pilot valve,
the fluid begins to flow through it, allowing flow through
orifices (5) and (6), at which a pressure drop occurs.
This leads to power balance change and the spool (3)
of the main stage compress spring (4) opening the
radial holes in the housing (1). This creates a flow P-T.
To ensure self bleeding it is recommended to install
the valve in a vertical position with the solenoid facing
downwards. Self bleeding is necessary for proper
function of the valve.
The body of the main and pilot valve are zinc coated.
7/8-14 UNF • p
max
350 bar (5076 PSI) • Q
max
60 L/min (15.85 GPM)
Built-in design
Three pressure ranges
Mechanical adjustment of upper and lower pressure
Expanded symbol:
(when lower pressure is set to 0 bar)
2
SR4E2-B2 /
HA 5068
Technical Data
Ordering Code
Valve size B2
Cartridge Cavity 7/8-14UNF-2A
Maximum operating pressure at ports P bar (PSI) 350 (5076)
Maximum operating pressure at ports T* bar (PSI) 100 (1450)
Flow range l/min (GPM) 0 ... 60 (0 ...15.85)
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range (FPM)
°C (°F) -30 ...+90 (-22 ... +194)
Ambient temperature max °C (°F) +50 (122)
Viscosity range mm
2
/s (SUS) 10 ... 500 (49 ... 2450)
Maximum valve tightening torque Nm ( lbf.ft) 50+5 (36.9+3.7)
Maximum degree of fluid contamination
Class 21/18/15 according to ISO 4406 (1999)
Minimum reachable pressure for Q = 5 L/min
(1.321 GPM)
bar (PSI) ~ 7 (101,5)
Weight kg (Ib) 0,556 (1.226)
Mounting position
When possible, the valve should be mounted vertically
with the solenoid faced down.
Valve body ( data sheet HA 0018) SB-B2
*Pressure in T influences p = f(I) a p = f(Q) valve performance
High Performance H
Seals
V FPM (Viton)
Solenoid Controlled Pilot Operated
Pressure Relief Valve
Solenoid coil must be ordered separately.
For solenoid selection please use catalogue HA 8007.
p-Characteristic Measured at ν = 32 mm
2
/s (156 SUS)
4 Pressure range 35
Typical
performance
3 Pressure range 21
2 Pressure range 12
1 Min. pressure (range 35) Deenergized
Pressure Range
12 up to 120 bar (1740 PSI)
21 up to 210 bar (3046 PSI)
35 up to 350 bar (5076 PSI)
4
2
3
1
0 10 20 30 40 50 60
Pressure range p bar ( )[ PSI ]
Flow Q (US GPM)[L/min ]
(2.64) (5.28) (7.93) (10.57) (13.21) (15.85)
(1450.4)
(2175.5)
(725.2)
(4351.1)
(5076.3)
(2900.7)
(3625.9)
(5801.5)
100
150
50
300
350
200
250
400
3
HA 5068
Coil example Voltage Connector Type code
12 VDC E2 - EN 175301-803-A with quenching diode
C19B-01200E1-4,9NA
24 VDC E2 - EN 175301-803-A with quenching diode
C19B-02400E1-20,8NA
12 VDC E4 - AMP Junior Timer with quenching diode
C19B-01200E3-4,9NA
24 VDC E4 - AMP Junior Timer with quenching diode
C19B-02400E3-20,8NA
12 VDC E13 - Deutsch DT04-2P with quenching diode
C19B-01200E12-4,9NA
24 VDC E13 - Deutsch DT04-2P with quenching diode
C19B-02400E12-20,8NA
Note:
Examples of most frequent coil types.
For complete range of valve coils with technical information about voltage, enclosure type and terminal, please refer to coil
data sheet HA 8007.
49,4(1.945)
19
(0.748)
37
(1.457)
29(1.142)
Solenoid Coil Data Sheet
Type E2
Valve Dimensions Dimensions in millimeters and (inches)
15,8
s=10 (0.39)
7/8-14UNF
32,5 (1.28) max.118,5(4.67)
41,5 (1.63)
(0.62)
37 (1.46)
12
(0. )47
19
(0. )75
27
24 16
3
1
2
Seal kit (Main valve)
- see Spare Parts
1. Dualseal - PU
2. O-ring - Viton
Mu 50+5 Nm
(36.9+3.7 lbf.ft)
Mu 3+1 Nm
(2.2+0.7 lbf.ft)
Mu 3+1 Nm
(2.2+0.7 lbf.ft)
4
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
tel.: +420-499-403 111
e-mail: info.cz@argo-hytos.com
www.argo-hytos.com
HA 5068
Caution!
Spare Parts
• The packing foil is recyclable.
• The technical information regarding the product presented in this catalog 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.
Subject to alteration without notice !
25,3+0,4(0.99+0.016)
33,3+0,4(1.31+0.016)
min 31,4(1.24)
max 23,6(0.93)
min14(0.55)
24±0,05(0.94/0.95)
min 34(1.34)
max 1(0.04)
min 16(0.63)
(0.624/0.627)
2,5 (0.1+0.016)+0,4
7/8-14 UNF -2B
30
°
R 0,2
R 0,2
15,87
+0,05
A
3
,2
1,61
A
0,05
A
0
,0
5
A
0
,0
4
3,2
(
(
,
90° 10°
±
1,6
30 2°
±
Cavity Dimensions in millimeters and (inches)
Solenoid coil
Type of the coil
E2 E4 E13
Nominal voltage coil
Ordering number
12 V DC 27631400 27631600 27632000
24 V DC 27632400 27633200 27633500
Main valve
Designation Ordering number
SR6H2-B2/HV 29248100
Seal kit (Pilot valve)
Designation Ordering number
Dualseal - PU O-ring
10,3 x 12,7 x 3,1 (1 pcs) 17,17 x 1,78 (1 pcs) 17014300
Seal kit (Main valve)
Dualseal - PU O-ring
13,47x15,87x3,1 (1 pcs) 19,4x2,1 (1 pcs) 18960500
