This 3 way direct operated pressure reducing valve is
designed to reduce the system pressure. Due to its
3 way design the valve is capable to relief as well the
secondary pressure. The pressure can be set by an
adjustment screw (6).
In its initial position the valve allows free flow from port P
to A. The pressure in port A acts on the front face of the
control spool (2) against the spring (5). When the
pressure in port A reaches the pressure set at the spring
the control spool moves into the regulating position and
closes the flow from port P to A until the pressure falls
back to the set pressure. This will maintain a constant
pressure in line A. A further pressure increase in port A
caused by a potential external force on the actuator will
cause the spool to shift against the spring until the spool
opens port T and allows the oil flow pass to tank.
The valve bush (1) is fixed to the cartridge (4) by a wire
ring (3). Decoupling the bush from the cartridge makes a
transmission of tensions caused by high tightening
torques impossible. In the basic version the valve corpus
and the adjustment screw are zinc plated
HA 5143
05/2014
3/4-16 UNF • p
max
350 bar (5076 PSI) • Q
max
20 L/min (5.3 GPM)
Directly Operated Pressure
Reducing Valves
SP2A-A3
A
T
P
P
T
A
k
j
ln
m
o
Replaces
HA 5143 10/2012
q
Screw-in cartridge design
q
3 pressure ranges
q
Pressure setting by hexagon socket
Functional Description
2
HA 5143
Ordering Code
Technical Data
Valve size A3
Cartridge cavity 3/4-16 UNF-2A
Max. flow rate L/min (GPM) 20 (5,28)
Max. input pressure (port P) bar (PSI)
150 (2176)
(pressure range 06)
250 (3626)
(pressure range 16)
350 (5076)
(pressure range 21)
Regulated pressure bar (PSI) 63 (914) 50-160 (725-2321) 100-210 (1450-3046)
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) 0,13 (0,286)
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-A3
p-Q Characteristics Measured at n= 32 mm
2
/s (156,8 SUS)
SP2A-A3 /
Pressure range
06 up to 63 bar (914 PSI)
16 up to160 bar (2321 PSI)
21 up to 210 bar (3046 PSI)
Directly Operated Pressure Reducing Valve
3/4-16 UNF
Standard S
Sealing
without designation
V
NBR
FPM (Viton)
Flow Q L[ ]/min(GPM)
Relieving pressure p bar(PSI)[ ]
Pressure regulating p [ ]bar(PSI)
20 15 10 5 0 5 10 15 20
Pressure range 06, 16, 21
0 4 8 12 16 20
5
10
15
25
30
20
A T® P A®
Minimal setting
for p 06ressure range
63
160
210
50
100
150
(3626)
200
Pressure regulating p [ ]bar(PSI)
Flow Q L/min(GPM)[ ]
(2901)
(2176)
(1451)
(726)
250
P A®
(363)
(290)
(218)
(145)
(73)
(435)
0 (1.056) (2.113) (3.170) (4.227) (5.283)
(5.28)(3.96)(2.64)(1.32) 0 (1.32) (2.64)(3.96)(5.28)
Dp-Q Characteristic Measured at n= 32 mm
2
/s (156,8 SUS)
Operating pressure p (bar)PSID ][
1
0 2 4 6 8 10 12 14 16 18 20
2
3
4
5
6
7
8
9
(14.5)
(29.0)
(43.5)
(58.0)
(72.5)
(87.0)
(101.5)
(116.0)
(130.5)
(0.53)
(1.06)
(1.58)
(2.11)
(2.64)
(3.17)
(3.70)
(4.23)
(4.76)
(5.28)
Flow Q /min(GPM)L][
P® A min.pressure differential
( Fully open control crossmsection)
Valve Dimensions Dimensions in millimeters (inches)
(0.623)
(0.559)
5 4 3 2 1
40(1.574) max. 77(3.031)
Æ 30 (1.18)
Æ 15,82
Æ 14,22
3/4-16 UNF-2A
Æ 24(0.945)
1 Adjustment element (screw with internal HEX 6)
Clockwise rotation = pressure increase
Atniclockwise rotation =pressure decrease
2 Locknut HEX 21 - tightening torque 15 Nm
3 Wrench flats HEX 27- tightening torque 30 Nm
4 O-ring 17 x 1,8 (supplied with valve)
5 Combined sealing:
Dualseal DRYZ000004Z20 11,87 x 14,27 x 3,1
Dualseal DRYZ000002Z20 13,47 x 15,87 x 3,1(supplied with valve)
4
HA 5143
Spare Parts
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.
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
Cavity Dimensions in millimeters (inches)
Seal kit
Dualseal - PU O-ring - NBR O-ring - Viton Order number
11,87 x 14,27 x 3,1 (1pcs.) 17 x 1,8 (1 pcs.) -
22565200
13,47 x 15,87 x 3,1 (1pcs.) 20,35 x 1,78 (1 pcs.) -
11,87 x 14,27 x 3,1 (1pcs.) - 17 x 1,8 (1 pcs.)
22565100
13,47 x 15,87 x 3,1 (1pcs.) - 20,35 x 1,78 (1 pcs.)
Caution!
