SO5A-BP3
7/8-14 UNF • Q
max
40 l/min (11 GPM) • p
max
420 bar (6100 PSI)
0 10 20 30 40
(2.6) (5.3) (7.9) (10.6)
20
12
9
6
(290)
(175)
(130)
(90)
3
(45)
15
(220)
18
(260)
1
2
Pilot ratio 2.5:1 and 5:1 Pilot ratio 8:1
0 10 20 30 40
(2.6) (5.3) (7.9) (10.6)
20
12
9
6
(290)
(175)
(130)
(90)
3
(45)
15
(220)
18
(260)
1
2
Symbol
Subject to change · SO5A-BP3_5199_2en_08/2020
Page 1
Overcenter Valve
Technical Features
Characteristics measured at ν = 40 mm
2
/s (195 SUS)
› The valve prevents runaway ahead of the pump in the event of a negative load
› Load-holding with leak-free closing poppet when the directional control valve is in neutral position
› Pressure relief function protecting the actuator against overloading and pressure peaks
› Integrated check valve acting as an anti-cavitation valve
› When installed close to actuator the valve can be used as a hose burst valve
› Setting can be performed during machine operation = leak free closing of adjustable element
› Wide range of relief pressure setting up to 420 bar (6100 PSI)
› In the standard version, the valve is zinc-coated for 520 h protection acc. to ISO 9227
Pressure drop ∆p [bar (PSI)]
Flow Q [l/min (GPM)]
Pressure drop ∆p [bar (PSI)]
Flow Q [l/min (GPM)]
Flow
1 free flow (2→1)
2 pilot open (1→2)
Flow
1 free flow (2→1)
2 pilot open (1→2)
Pressure drop related to flow rate Pressure drop related to flow rate
Functional Description
Poppet-type, screw-in motion control valve designed to control the runaway of a negative load. The built-in
check valve allows reverse flow into the actuator, which is protected by the internal pressure relief function.
Valve size / Cartridge cavity 7/8-14 UNF-2A / BP3 (C-10-3S)
Max. flow l/min (GPM) 40 (10.6)
Relief pressure range 21 32 42
Max. load induced pressure bar (PSI) 175 (2540) 265 (3840) 350 (5080)
Max. relief pressure bar (PSI) 210 (3050) 320 (4640) 420 (6090)
Fluid temperature range (NBR) °C (°F) -30... +100 (-22... +212)
Fluid temperature range (FPM) °C (°F) -20... +120 (-4... +248)
Pilot ratio 2.5:1 5:1 8:1 10:1
Leakage ml/min 0,3 (5 drops per min)
Weight kg (Ibs) 0,29 (0.64)
Datasheet Type
General information GI_0060 Products and operating conditions
Valve bodies
In-line mounted SB_0018 SB-BP3*
Sandwich mounted SB-04(06)_0028 SB-BP3*
Cavity details SMT_0019 SMT-BP3*
Spare parts SP_8010
Technical Data
2.5:1
5:1
8:1
10:1
2
5
8
10
21
32
42
SO5A - BP3 / H - S - B
0 10 20 30 40
(2.6) (5.3) (7.9) (10.6)
25
20
15
10
(360)
(220)
(145)
5
(75)
(290)
1
2
Subject to change · SO5A-BP3_5199_2en_08/2020
Page 2
www.argo-hytos.com
Dimensions in millimeters (inches)
Ordering Code
Overcenter valve
Seals
NBR
FPM (Viton)
Surface treatment
zinc-coated (ZnNi), ISO 9227 (520 h)
Pilot ratio
standard
No designation
V
Adjustment option
allen head (Hex. 5) without protective cap
Relief pressure range
70 - 210 bar (1020 - 3050 PSI)
106 - 320 bar (1540 - 4640 PSI
140 - 420 bar (2030 - 6090 PSI)
Valve cavity
7/8-14 UNF (C-10-3S)
Model
High performance
Pilot ratio 10:1
Characteristics measured at ν = 40 mm
2
/s (195 SUS)
Pressure drop ∆p [bar (PSI)]
Flow Q [l/min (GPM)]
Pressure drop related to flow rate
Flow
1 free flow (2→1)
2 pilot open (1→2)
