FLUID POWER SYMBOL
TUCSON
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
4
Umbergaon, Gujarat
C1B 246/5, G.I.D.C. Indl. Estate
tucson@vsnl.com
3D ISOMETRIC VIEW
OVERCENTRE VALVEOSI35
Specifications
Figures based on: Oil Temp = 40°C Viscosity = 40 cSt
Rated Flow 40 lpm
Max Setting
Load Induced Pressure : 270 bar
Relief Setting : 350 bar
Cartridge Material
Working parts : Hardened, ground steel
External surfaces : Zinc plated
Weight (Cartridge only)
OSI35: 0.150 kg
Cavity Number TH6610 (Refer Cavities Section)
Manifold Material
Aluminium (upto 250 bar)
Add Suffix ‘729’ for SG Iron (350 bar)
Torque into Cavity 45 Nm
Mounting Line/Subplate
Seal Kit Number SKOSI35 (Nitrile) SKOSI35 V (Viton
®
)
Filtration Level BS5540/4 Class 18/13 (25µ nominal)
Operating Temp -20°C to +90°C (Standard Seals)
Leakage Less than 0.3 millilitres/min (5 dpm)
Viscosity Range 5 to 500 cSt
Application
Overcentre valves give static and
dynamic control of loads by regulating
flow into and out of hydraulic actuators.
The Overcentre valve will stop the load
from running away in the event of a
hose burst. If open center directional
control valves are used, they will allow
the thermal expansion relief of the
hydraulic fluid. These valves provide
excellent hose burst protection.
Operation
The check section allows free flow into
the actuator (from 2 to 1) then holds and
locks the load against movement (from
1 to 2). The pilot pressure in the pilot port
(3) will give a controlled movement to
piston when the pressure is applied. The
pressure required to open the valve and
allow movement depends on the pilot
ratio of the valve. The pressure required
t
o open the valve and start actuator
movement can be calculated as follows:
Pilot Ratio
7:1
Best suited for applications where
the load varies and machine
structure can induce instability.
Other ratios can be made available
upon request.
Pilot = Relief Setting - Load Pressure
Pressure Pilot Ratio
1
2 3
HEX ADJUST
5 A/F
25.4 A/F
17 A/F
M20 x 1.5
1
2
3
43
3
1
2
4-210.A
52
PRESSURE CHARACTERISTICS
TO ORDER
T
UCSON
H
YDROCONTROLS
www.tucsonhydrocontrols.com
tucson@vsnl.com
Umbergaon, Gujarat
C1B 246/5, G.I.D.C. Indl. Estate
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
4
Pressure (bar)
Flow (lpm)
4-210.B
BASIC CODE
ADJUSTMENT
F: SCREW ADJUST
PORT SIZE
3W: 3/8 BSP PORTS
OMIT FOR CARTRIDGE
SEAL KIT
N: NITRILE
V: VITON
PRESSURE RANGE
20: 70 to 225 bar. Std setting 100 bar
35: 70 to 350 bar. Std setting 210 bar
OSI35 F 3W 35 N 7 IN1
AREA RATIO
7: RATIO OF 7:1
INTERNAL PILOT
OMIT FOR EXTERNAL PILOT
BASIC CODE: OSI35 3W
3/8" BSP PORTS
COMPLETE VALVE
BASIC CODE: OSI35 3W IN1 (INTERNAL PILOT)
3/8" BSP PORTS
COMPLETE VALVE
3
2
1
942
9
PILOT PORT
1/4 BSP
O 9 THRO'
2 PLACES
12
26,5
60
3
32
17
12,6
12,6
20 40
O 7 THRO'
2 PLACES
12,6
10
20,8
70
39
14,1
19,4
56
0
0 4 8 12 16 20 24 28 32 36
5
10
15
20
25
30
35
40
45
50
40 44 48
FREE FLOW
PILOT OPEN
C1
V1
C2
V2
1
2
ONLY Body Part Numbers (BSP)
Aluminium
3/8” Z10386 3/8” Z10386S
ONLY Body Part Numbers (BSP)
Aluminium
3/8” Z10331 3/8” Z10331S
64
34
TUCSON
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
Umbergaon, Gujarat
C1B 246/5, G.I.D.C. Indl. Estate
tucson@vsnl.com
TO ORDER
4
BASIC CODE: OSI2 35 3W
3/8" BSP PORTS
COMPLETE VALVE
4-210.C
BASIC CODE: OSIG35
SUBPLATE MOUNTED
COMPLETE VALVE
V
1
V
2
V1
V2
C1
C2
C2
C1
V2
V1
10 82
102
56
64
26
17
34
O 9 THRO'
2 PLACES
OVERCENTRE VALVEOSI35
1
2
3
1
3
2
9,3 66,4
8,7 43
42,5
20
85
O 11 THRO'
4 PLACES
1
3
2
11
43
66,4
8,7
70
9,3
85
7,6
33,2
7,2
21,5
35,8
BASIC CODE
OSI2 35: DUAL OVERCENTRE VALVE
OSIG35: SUBPLATE OVERCENTRE VALVE
ADJUSTMENT
F: SCREW ADJUST
PORT SIZE
3W: 3/8 BSP PORTS
OMIT FOR SUBPLATE
SEAL KIT
N: NITRILE
V: VITON
PRESSURE RANGE
20: 10 to 200 bar. Std setting 100 bar
35: 30 to 350 bar. Std setting 280 bar
OSI2 35 F 3W 35 N 7
AREA RATIO
7: RATIO OF 7:1
M10 x 15 DEEP
4 PLACES
O 8,0 - 2 PLACES
O 6,0
ONLY Body Part Numbers
Aluminium
- - Subplate Z10380
40
70
ONLY Body Part Numbers (BSP)
Aluminium
3/8” Z10045 3/8” Z10045S
31,7 38,6
TO ORDER
T
UCSON
H
YDROCONTROLS
www.tucsonhydrocontrols.com
tucson@vsnl.com
Umbergaon, Gujarat
C1B 246/5, G.I.D.C. Indl. Estate
Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.
4
BASIC CODE
OSIG2 35: SUBPLATE DUAL OVERCENTRE VALVE
ADJUSTMENT
F: SCREW ADJUST
PORT SIZE
3W: 3/8 BSP PORTS
OMIT FOR SUBPLATE
SEAL KIT
N: NITRILE
V: VITON
PRESSURE RANGE
20: 10 to 200 bar. Std setting 100 bar
35: 30 to 350 bar. Std setting 280 bar
OSIG2 35 F 3W 35 N 7
AREA RATIO
7: RATIO OF 7:1
C1
C2
V2V1
BASIC CODE: OSIG2 35
3/8" BSP PORTS
COMPLETE VALVE
C2
C1
V2
V1
ONLY Body Part Numbers (BSP)
Aluminium
- - 3/8” XP137A1
= =
42
=
= =
8 15
15,5
39
65
=
76
100
12 38 38
19 38
100
815
7,5
M8 - 20 DEEP
6 PLACES
O10
2 PLACES
4-210.D
50
15,5