0
5
10 15
20 25 30
35
0
3
6
9
12
15
P
R
E
S
S
U
R
E
(
B
A
R
)
1.3
2.6 3.9
5.2 6.5 7.8 10.4
P
R
E
S
S
U
R
E
(
P
S
I
)
0
45
90
130
175
210
FLOW (LITRES/MIN)
FLOW (US GPM)
40
9.1
18
260
2-3 & 3-2
1-2 & 2-1
1
3
2
P
(2)
(1) (3)
ACT.2
ACT.1
(2)
T
(3)
(1)
P
ACTUATOR
(2)
P
(1)
T
ACTUATOR
(3)
3
2
1
S521(H) Directional Control Valve - 3-Way, 2-Position Spool
Up to 44 litres/min (11.5 US GPM) Up to 210 bar (3000 PSI)
S521(H)
APPLICATION
COIL INFORMATION
PRESSURE DROP v’s FLOW
SPECIFICATIONS
Integrated Hydraulics Ltd Integrated Hydraulics Inc
Collins Road, Heathcote Ind. Est., Warwick, CV34 6TF, UK. 7047 Spinach Drive, Mentor, Ohio 44060, USA
Tel: +44 (0) 1926 881171 Fax: +44 (0) 1926 315729 Tel: (440) 974 3171 Fax: (440) 974 3170
Website: www.integratedhydraulics.com Website: www.integratedhydraulics.com
11-2411.A
NORMALLY
CLOSED
(Pressure at Port 3)
NORMALLY
OPEN
(Pressure at Port 1)
SELECTOR
(Pressure at Port 2)
Basic Model Code
Symbol
Max. Working Pressure
Actuator Port Location
Port 2
Flow Rating
Temperature Range
Nominal Viscosity Range
Recommended Filtration
Fluid
Seal Material
Mounting Position
Cartridge Weight
Coil Weight
Cavity Number
S521 / S521H
210 bar (3000 psi)
See performance graphs
Less than 120 ml/min past each land
210 bar differential at 32 centistokes
-20 to +120°C (-4 to +248°F)
15 to 250 centistokes
BS5540/4 18/13 (25 micron or better)
Compatible with most general purpose
hydraulic fluids
Standard nitrile with PTFE back up rings
Unrestricted
0.2 kg (0.4 lbs)
0.3 kg (0.6 lbs)
Torque into Cavity 30 Nm (22 lbs ft)
Electrical Data See coil data sheet
Internal Leakage
17 l/min
Nominal flow
(at Delta P = 5 bar (70 psi))
FEATURES
High flow capacity with reduced space requirements.
No dynamic seals.
Standard valve bodies and common cavities.
One-piece encapsulated coil with minimal amperage draw.
Oil immersed armature solenoid.
Various coil terminals and voltages.
Coil interchangeability with all Series S5 valves.
Manual override, seal variations and other options
available.
Sealed coil arrangement to protect stem from corrosion.
Line Body Material Aluminium Alloy
A12743 (See section17)
11
(See Page 11-1021)
Part Number: C16-*-*/19 (S521)
C16-*-*/29 (S521H)
Voltage available: 12, 24 VDC
110, 220 VAC*
* AC coils must be used with a rectifying connector.
Viscosity = 32 cSt (150 SSU)
Seal Kit Number
SK1030 (Nitrile) SK1030V (Viton)
3
2
1
25.40 A/F
7/8"-14-UNF-2A
8.30 50.00
ø15.80
ø17.40
47.10
35.50
21.00
49.00
66.00
3
1
2
2 HOLES
ø7.1 THRO'
31.80
16.00
1
8
.
5
0
6
6
.
8
0
31.80
50.80
6.35
5
4
.
0
0
63.50
3
4
.
5
0
0
5
10 15
20 25 30
35
0
50
100
150
200
250
W
O
R
K
I
N
G
P
R
E
S
S
U
R
E
(
B
A
R
)
1.3
2.6
3.9
5.2 6.5 7.8
W
O
R
K
I
N
G
P
R
E
S
S
U
R
E
(
P
S
I
)
0
725
1450
FLOW (LITRES/MIN)
FLOW (US GPM)
9.1
2175
2900
3625
NORMALLY CLOSED
S521H
NORMALLY CLOSED
S521
40
10.4
NORMALLY OPEN
S521(H)
ORDERING CODE EXAMPLE
We reserve the right to change specifications without notice
11-2412.B
PERFORMANCE
CARTRIDGE ONLY COMPLETE VALVE
SELECTOR MODE NORMALLY CLOSED & NORMALLY OPEN MODES
Basic Code
S521 = (standard valve)
S521H = (heavy duty valve)
Manual Override (consult factory for availability)
2 = Screw
Voltage
12 = 12 VDC 110 = 110 VAC
24 = 24 VDC 220 = 220 VAC
Coil Termination
H = DIN43650
F = Flying Leads
DM = Deutsch Moulded
Other terminations available on
request
Port Sizes
3W = 3/8” BSP
4W = 1/2” BSP 8T = 1/2” SAE
PERFORMANCE
S521* N H 24 3W
Where measurements are critical request certified drawings
BASIC CODE: S521(H) BASIC CODE: S521(H)
3/8” 1/2” PORTS
Seals
N = Nitrile
V = Viton
11
Body ONLY part numbers
BSP, aluminium
3/8” B18982
1/2” B19358
SAE, aluminium
1/2” B19360
0
5
10 15
20
25
30
35
0
50
100
150
200
250
WORKING PRESSURE (BAR)
1.3
2.6 3.9
5.2
6.5 7.8
WORKING PRESSURE (PSI)
0
725
1450
FLOW (LITRES/MIN)
FLOW (US GPM)
9.1
2175
2900
3625
S521H
S521
40
10.4
