q
Screw-in cartridge design
q
5 pressure ranges
q
Pressure setting by
- Hexagon set screw lock
- Adjustable handknob
HA 5144
7/2012
7/8-14 UNF • p
max
350 bar (5076 PSI) • Q
max
60 L/min (15.85)GPM)
Pilot Operated Pressure
Reducing Valves
SP4A-B3
The pressure valves SP4A-B3 are pilot operated
screw-in cartridge pressure reducing valves designed as
3 way valves, i.e. with pressure protection of the secon-
dary circuit. The reducing valve consists of a body (1)
with thread 7/8-14 UNF, control spool (2), spring (3) and
the adjustment element (4). The flow from the primary
circuit flows to the first metering edge, where its pressure
is reduced. The reduced pressure corresponds with the
adjustment of the control spring of the ball pilot valve (5).
The reduced pressure is continuously controlled and
compared with the pressure preset. If any control error
appears, the respective control action takes place and
the reduced pressure returns to its preset value. If
pressure behind the valve increases due to the effect of
external load acting on the user, the control spool shifts
further against the spring, the reducing metering edge
closes and the second metering edge opens. The fluid
passes through the „third way“ to port T. The control flow
of the pilot valve (from the spring room) is also routed to
port T.
The valve body and the adjustment screw are zinc
coated.
A
k
j
l
n
m
Functional Description
T
P
A
Replaces
HA 5144 11/2008
HA 5144
Ordering Code
Directly Operated Pressure Relief Valve
7/8-14 UNF
SP4A-B3 /
p-Q Characteristics Measured at n= 32 mm
2
/s (156 SUS)
Technical Data
Valve size B3
Cartridge thread 7/8-14 UNF-2A
Max. flow rate L/min (GPM) 60 (15.85)
Max. input pressure (port P) bar (PSI) 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 (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) 0.24 (0.53)
Maximum valve tightening torque Nm ( Ibf.ft) 35+5 (25.8+3.7)
Mounting position unrestricted
Valve body ( data sheet HA 0018) SB-B3
Seals
without designation
V
NBR
FPM (Viton)
Dp-Q Characteristic Measured at n= 32 mm
2
/s (156 SUS)
Adjustment option
S Hexagon set screw locknut 5 mm
R Adjustable handknob
Standard S
Pressure range
up to 63 bar (914 PSI)
6
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
P® A min.pressure differential
( Fully open control crossmsection)
HA 5144
Valve Dimensions Dimensions in millimeters (inches)
7/8-14UNF-2A
47(1.85)
6 4 3 15
Æ
26,5(1.04)
Æ
15,82 (0.62)
Æ
17,42(0.69)
HEX24
HEX17
HEX5
68(2.68)
Æ
40(1.57)
83(3.27)
29(1.14)
2
1 Adjustment element "S" (inside HEX 5)
Clockwise rotation = pressure increase
Anticlockwise rotation = pressure decrease
2 Adjustable handknob model "R"
3 Locknut s=17mm (0.669 in) - tightening torque 10 Nm (7.4 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:
DRYZ000002Z20 13,47 x 15,87 x 3,1
DUYZ000001Z20 17,47 x 15,07 x 3,1 (supplied with valve)
Cavity Dimensions in millimeters (inches)
HA 5144
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
Dualseal - PU O-ring - Viton Ordering number
DRYZ000002Z20 13,47 x 15,87 x 3,1 (1pc.) 19,4 x 2,1 (1pc.)
18775700
DUYZ000001Z20 17,47 x 15,07 x 3,1 (1pc.) -
