1
q
Screw-in cartridge design
q
4 pressure ranges
q
Pressure setting by hexagon socket
Functional Description
The directly operated pressure relief valve SR1A-A2
consists basically of the valve housing (1), ball with
damping spool (2), damping bush (3), spring (4) and
setting screw (5). The pressure setting is accomplished
by setting screw (5) with hexagon socket. The spring
pushes the ball into the valve seat created directly in the
valve housing and holds the valve closed. When the
pressure in port P exceeds the pressure magnitude set
by the setting screw, the ball is lifted up from the seat and
the fluid flows out to port T. To optimize the valve
performance, the whole pressure range is divided into 4
pressure ranges. Choosing the next higher pressure
range is always recommended.
In basic version the valve housing and the setting screw
are zinc coated.
HA 5063
7/2012
3/4-16 UNF • p
max
350 bar (5080 PSI) • Q
max
30 L/min (7.9 GPM)
Directly Operated Pressure Relief
Valves
SR1A-A2
k
j
l
n
m
Replaces
HA 5063 8/2010
2
HA 5063
Ordering Code
Pressure range
6 up to 60 bar (870 PSI)
10 up to 100 bar (1450 PSI)
16 up to 160 bar (2320 PSI)
25 up to 250 bar (3626 PSI)
35 up to 350 bar (5076 PSI)
Pressure p [bar (PSI)]
Flow Q [L/min (GPM)]
0
(725)
(2175)
(1450)
(3626)
(2900)
(5076)
(4351)
0
50
150
100
250
200
350
300
6 12 18 24 30
(1.58) (3.17) (4.75) (6.34) (7.95)
0
50
150
100
250
200
350
300
6 12 18 24 30
Pressure range 35
Pressure range 25
Pressure range 16
Pressure range 10
Pressure range 6
Min. pressure setting
SR1A-A2 /
Directly Operated Pressure Relief Valve
3/4-16 UNF
Standard S
Technical Data
Valve size A2
Cartridge cavity 3/4 -16 UNF-2A
Max. flow rate L/min (GPM) 30 (7.9)
Max. service pressure port P) bar (PSI) 350 (5076)
Max. output pressure (port T) bar (PSI) 160 (2320)
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 (NBR) °C (°F ) -30 ... +100 (-22 ... 212)
Fluid temperature range for Viton 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) 0.13 (2.866)
Maximum valve tightening torque Nm ( Ibf.ft) 30+2 (22.13+1.48 Ibf.ft)
Mounting position unrestricted
Valve body ( data sheet HA 0018) SB-A2
p-Q Characteristics Measured at n = 32 mm
2
/s (156 SUS)
Seals
without designation
V
NBR
FPM (Viton)
3
HA 5063
Valve Dimensions Dimensions in millimetres (inches)
Screw-in Cartridge Design
1 Adjustment element (screw with
internal HEX 6)
Clockwise rotation = pressure
increase
Anticlockwise rotation = pressure
decrease
2 Locknut HEX 21
- tightening torque 15 Nm (11 Ibf.ft)
3 Wrench flats HEX 24
- tightening torque 30 Nm (22 lbf.ft)
4 O-ring 17 x 1.8 (supplied with valve)
5 Combined sealing:
Dualseal DRYZ000004Z20
10.3 x 12.7 x 3.1 (supplied with valve)
( 1.043)
Æ
Æ
12.65-0.025
73.5 - 77.5 (2.894-3.051)
28(1.102)
3/4-16 UNF-2A
5 4 3 2 1
(
Æ
0.498-0.001)
Æ
26.5
Cavity Dimensions in millimetres (inches)
(
(
,
R 0,2 R 0,2
3,2
1,6
1,6
30°
min 14,3(0.563)
20,63+0,4 (0.812+0.016)
min 28,6 (1.126)
90° 10°
±
3/4-16 UNF-2B
30° 2°
±
25+0,4 (0.984+0.016)
Æ
Æ
20,6
+0,1 (0.811+0.004)
max. 18,9 (0.744)
A
A
1,6
0.04(0.001)
Æ
12,7
+0,05 (0.499+0.002)
A
0.05(0.002)
A
0.05(0.002)
2,5+0,4(0.0984+0.016)
max. 1(0.039)
min.9,5(0.374)
28,6+0,4 (1.126+0.016)
Spare Parts
Seal kit Ordering number
Dualseal - PU O-ring - NBR O-ring - NBR Back-up ring - NBR
22531100
10.3 x 12.7 x 3.1 (1pc.) 17 x 1.8 (1pc.) 17.17 x 1.78 (1pc.) 16.33 x 19.03 x 1.14 (1pc.)
Dualseal - PU O-ring - Viton Back-up ring - Viton
22531000
10.3 x 12.7 x 3.1 (1pc.) 17.17 x 1.78 (2pcs.) 16.33 x 19.03 x 1.14 (1pc.)
4
HA 5063
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
