SO5A-R3/I
M27x1.5 • Q
max
90 l/min (24 GPM) • p
max
350 bar (5100 PSI)
Pilot ratio 4:1 and 8:1
1
2
3
0 25 50 75 100
2
6
4
(29)
(174)
(145)
(116)
(58)
10
8
12
14
(87)
(203)
(6.6) (13.2) (19.8) (26.4)
1
2
Subject to change · SO5A-R3/I_5205_2en_05/2017
www.argo-hytos.com
Page 1
Overcentre Valve
Technical Features
Functional Description
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 directional valve is in neutral position
› Pressure relief function protecting the actuator against overload and pressure peaks
› Integrated check valve acting as an anti-cavitation valve
› When installed into an actuator the valve can be used as a hose burst valve
› In the standard version, the valve is zinc-coated for 240 h protection acc. to ISO 9227
Pressure drop ∆p [bar (PSI)]
Flow Q [l/min (GPM)]
Poppet type, screw-in motion control valve designed to control the runaway of a negative load. The built-in
check valve allows reverse ow into the actuator, which is protected by the internal pressure relief function.
Technical Data
Pressure drop related to flow rate
Flow
1 free ow (2→1)
2 pilot open (1→2)
Symbol
Valve size / Cartridge cavity M27x1.5 / R3
Max. ow l/min (GPM) 90 (23.8)
Max. load induced pressure bar (PSI) 270 (3920)
Max. relief pressure bar (PSI) 350 (5080)
Fluid temperature range °C (°F) -20 .... +90 (-4 ... +194)
Pilot ratio 4:1, 8:1
Internal Leckage mil/min 0.3 nominal (5 drops per min)
Max. degree of uid contamination ISO 4406 Class 21/18/13
Mass kg (Ibs) 0.29 (0.64)
Datasheet Type
General information GI_0060 Products and operating conditions
Valve bodies In-line mounted SB_0018 SB-R3*
Cavity details SMT_0019 SMT-R3*
Spare parts SP_8010
54 (2.13)
5
17
32
60+2Nm
62 (2.44) MAX
M27 x 1,5
(44+1.5 lbf.ft)
A
35
SO5A-R3 / l - - -
Seals
NBR
FPM (Viton)
Surface treatment
zinc-coated (ZnCr-3), ISO 9227 (240 h)
Factory setting [bar @ l/min]
210 bar at 4.8 l/min210/4,8
Overcentre valve M27x1.5
Relief pressure range
200 - 350 bar (2900 - 5080 PSI)
No designation
V
4
8
4:1
8:1
Pilot ratio
standard
Subject to change · SO5A-R3/I_5205_2en_05/2017
www.argo-hytos.com
Page 2
Dimensions in millimeters (inches)
Ordering Code
