k
jpl
o
nm
1
q
Screw-in cartridge design
q
5 pressure ranges
q
Pressure setting by
- Hexagon set screw lock
- Adjustable handknob
HA 5065
01/2014
7/8-14 UNF •p
max
350 bar (5076 PSI) • Q
max
100 L/min (26.4 GPM)
Pilot Operated Pressure
Relief Valves
SR4A-B2
Pressure relief valves SR4A-B2 are pilot operated
pressure valves designed for system pressure limitation.
The pressure adjustment provides the adjustment
screw (4). In its basic state, the valve is closed. The
pressure acts on the face area of the control spool (1)
and at the same time through orifice (2) on the control
spool rear side, which is preloaded by a spring and
further on through orifice (3) on the pilot valve ball (6).
When the increasing system pressure reaches the value,
which is preset by spring (5), the valve opens and the
control flow passes through the pilot valves. The spool
area which is preloaded by the spring becomes relieved,
the spool control edge opens the radial bores in bushing
(7) and the fluid passes from port P to T. The control flow
is routed through groove to channel T.
The valve body and the adjustment screw are zinc
coated.
Functional Description
Replaces
HA 5065 äÇÉ20£Ó
HA 5065
Ordering Code
0 20 40 60 80 100
100
150
50
300
350
200
250
Flow Q ( )[]L/min GPM
(1450)
(2176)
(725)
(4351)
(5076)
(2901)
(3626)
0 (5.3) (10.6) (15.9) (26.4)(21.1)
Pressure p bar PSI[]()
(5801)
400
3
1
2
6
4
5
Pressure drops related to flow rate.
p-Q Characteristics Measured at n = 32 mm
2
/s (156 SUS)
Technical Data
Valve size B2
Cartridge thread 7/8 -14 UNF-2A
Max. flow rate L/min (GPM) 100 (26.4)
Max. input pressure (port P) bar (PSI) 6.3 (914) 100 (1450) 160 (2320) 250 (3626) 350 (5076)
Max. output pressure (port T) bar (PSI) 100 (1450)
Working pressure related to flow bar (PSI) see p-Q characteristics
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range for standard
sealing (NBR)
°C (°F ) -30 ... +100 (-22 ... 212)
Fluid temperature range for Viton
sealing (FPM)
°C (°F ) -20 ... +120 (-4 ... 248)
Viscosity range mm
2
/s (SUS) 10 ... 500 (49 ... 2450
Max. degree of fluid contamination Class 21/18/15 according to ISO 4406
Weight kg (Ibs) 0.24 (0.53)
Maximum valve tightening torque Nm ( Ibf.ft) 35+5 (25.8+3.7 Ibf.ft)
Mounting position unrestricted
Valve body ( data sheet HA 0018) SB-B2
2
6
Pressure range 35
5
Pressure range 25
4
Pressure range 16
3
Pressure range 10
2
Pressure range 6,3
1
Min. pressure setting
SR4A-B2 /
Pilot Operated Pressure Relief Valve
7/8 -14 UNF
Seals
without designation
V
NBR
FPM (Viton)
Adjustment option
S Hexagon set screw locknut 5mm)
R Adjustable handknob
Pressure range
up to 63 bar (914 PSI)
6,3
up to 100 bar (1450 PSI) 10
up to 160 bar (2320 PSI) 16
up to 250 bar (3626 PSI) 25
up to 350 bar (5076 PSI) 35
High performance H
3
HA 5065
Valve Dimensions Dimensions in millimetres (inches)
31,25(1.23)
Æ
26,5(1.04)
100(3.94)
HEX24
7/8-14UNF-2A
15,82 (0.622)
HEX17
HEX5
Æ
40(1.57)
83(3.27)
29(1.14)
2
6 5 4 3 1
1 Adjustment element "S" (inside HEX 5)
Clockwise rotation = pressure increase
Anticlockwise rotation = pressure decrease
2 Adjustable handknob model "R"
3 Locknut s = 17mm (0.67 in) - tightening torque 10 Nm(7.38 Ibf.ft)
4 Wrench flats s = 24 mm (0.945 in) - tightening torque 35+5 Nm
(25.8+3.7 Ibf.ft)
5 O-ring 19,4 x 2,1 (supplied with valve)
6 Combined sealing:
Dualseal DRYZ000002Z20 13,47x15,87x3,1 (supplied with valve)
Cavity Dimensions in millimetres (inches)
4
HA 5065
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.
Caution!
Subject to alteration without notice!
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
Spare Parts
Seal kit Ordering number
Dualseal - PU O-ring - NBR
18775600
DRYZ000002Z20 13,47 x 15,87 x 3,1 (1pc.) 19,4 x 2,1 (1pc.)
