3
2
ATMOSPHERIC
1
VENT
PILOT (3)
CYL (1)
VALVE (2)
VENT (4)
1CPB SERIES ZERO DIFFERENTIAL
OVERCENTRE VALVE
FULLY BALANCED - PILOT ASSISTED
1CPB30
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
6-137.C
6
SPECIFICATIONS
Figures based on: Oil Temp = 40°C Viscosity = 40 cSt
5 to 500 cSt
Nominal Viscosity
Range
Rated Flow 30 litres/min (8 US GPM)
350 bar (5000 psi)
Max Working
Pressure
Weight
Seal Kit Number
Operating Temp
Working parts hardened and ground
steel. External surfaces zinc plated
-20°C to +90°C
UnrestrictedMounting Position
Cartridge Material
BS5540/4 Class 18/13
(25 micron nominal)
A6610 (See section 17)Cavity Number
45 Nm (33 lbs ft)
Torque Cartridge
into Cavity
SK1151 (Nitrile) SK1151V (Viton)
SK1151P (Polyurethane/Nitrile)
Leakage 0.3 millilitres/min max (5 dpm)
Recommended
Filtration Level
Body Material
1CPB30 0.15 kg (0.33 lbs)
1CPB35 0.41 kg (0.90 lbs)
Standard aluminium (up to 210 bar*)
Add suffix ‘377’ for steel option
APPLICATION
FEATURES
Zero differential overcentre valves give static and
dynamic control of loads by supplying a restriction to
flow related to the opening of the valve created by the
pilot pressure.
The valve is used in conjunction with a remote pilot
source to provide hose failure protection, load control
and load holding functions.
If over-pressure or shock pressure protection is
required then a separate relief valve should be used.
The cartridge fits a simple cavity allowing quick, easy
field service reducing down time.
Hardened poppet and seat provide for long leak free
performance.
Fits standard 30 litre overcentre cavity.
OPERATION
The check section allows free flow into the actuator then
holds and locks the load against movement. By the
application of pilot pressure to the pilot port the poppet
moves back against the main spring opening the
cylinder port to the valve port. The metering characteristic
of the valve is controlled by the rate of the spring, the seat
angle and the pilot pressure applied.
Due to the balanced poppet design load induced
pressure will not open the valve and once open valve port
pressure will not increase the pilot pressure required to
keep the valve open.
*For applications above 210 bar please consult our technical department or use the steel body option.
17.0 A/F
25.4 A/F
VALVE (2)
PILOT (3)
HEX SOCKET ADJUST
4.0 A/F
M20 X 1.5-6g
CYL (1)
5
1
.
2
M
A
X
4
2
.
5
VENT (4)
12.5
10
7.55
2.5
0
FLOW-US GPM
FLOW-LITRES/MIN
P
R
E
S
S
U
R
E
-
P
S
I
P
R
E
S
S
U
R
E
-
B
A
R
10
20
30
40
50
10
20 30
40 50
0
0
150
300
450
600
750
FREE FLOW
PILOT OPEN
ORDERING CODE EXAMPLE
We reserve the right to change specifications without notice
6-138.B
6
Where measurements are critical request certified drawings
BASIC CODE: 1CPB30
PRESSURE DROP
CARTRIDGE ONLY
9.0
32.0
63.5
2
6
.
5
6
0
.
0
9
.
0
4
2
.
0
16.0
31.8
1
1
.5
1
1
1
.
2
M
A
X
2 HOLES ø9.0 THRO'
2
1
3
SINGLE VALVE
BASIC CODE: 1CPB35
3/8” 1/2” PORTS
Body ONLY part numbers
BSP, aluminium
3/8” B6743
SAE, aluminium
3/8” B10536
1/2” B7884
BSP, steel
3/8” B12823
SAE, steel
1/2” B11811
Basic Code
1CPB30 = Cartridge Only
1CPB35 = Cartridge and Body
Adjustment Means
F = Screw Adjustment
Port Sizes - Bodied Valves Only
3W = 3/8” BSP Valve & Cyl Port. 1/4” BSP Pilot Port
6T = 3/8” SAE Valve & Cyl Port. 1/4” SAE Pilot Port
8T = 1/2” SAE Valve & Cyl Port. 1/4” SAE Pilot Port
Pilot Adjustment Range
2 = 5 - 20 bar. Std setting 10 bar
Std setting made at
4.8 litres/min
Seals
S = Nitrile (For use with most
industrial hydraulic oils)
SV = Viton (For high temperature and
most special fluid applications)
P = Polyurethane/Nitrile (For
arduous applications)
1CPB*** F 3W P
2
Tightening torque of “F” adjuster
locknut - 20 to 25 Nm
