3
2
1
PILOTED OPEN
PILOTED OPEN
FREE FLOW
FREE FLOW
G.P.M.(135 SUS)
G.P.M.(135 SUS)
L/M (28,5 cSt)
L/M (28,5 cSt)
FOR ALUMINUM OR STEEL VALVE HOUSING CONFIGURATIONS SEE PAGE 0-023-1.
FOR ALUMINUM OR STEEL VALVE HOUSING CONFIGURATIONS SEE PAGE 0-023-1.
PRESSURE DROP ( P)
PRESSURE DROP ( P)
PSI
PSI
0
100
100
200
200
5
10
10
15
15
20
20
300
300
400
400
500
500
19
19
38
38
57
57
76
76
BAR
BAR
25
25
30
30
35
35
6,9
6,9
13,8
13,8
20,7
20,7
27,6
27,6
132
132
95
95
114
114
35,0
35,0
[76,2]
[76,2]
3.00"
3.00"
[88,9]
[88,9]
3.50"
3.50"
[59,2]
[59,2]
2.33"
2.33"
1
2
1.31"
1.31"
[49,8]
[49,8]
.315"[8,0] HEX.
.315"[8,0] HEX.
1.96"
1.96"
HEX
HEX
[33,3]
[33,3]
3
SEALS
SEALS
12 = 1.062"-12 UNF
12 = 1.062"-12 UNF
BASIC
BASIC
SIZE
SIZE
N = BUNA "N"
N = BUNA "N"
V = VITON
V = VITON
PRESSURE RANGE
PRESSURE RANGE
15
15
30
30
40
40
= 100 TO 1500 PSI
= 100 TO 1500 PSI
= 300 TO 3000 PSI
= 300 TO 3000 PSI
= 600 TO 4000 PSI
= 600 TO 4000 PSI
PORTS
PORTS
0
04BX
04BX
06BX
06BX
10TX
10TX
12TX
12TX
= CARTRIDGE ONLY
= CARTRIDGE ONLY
= G 1/2" BSPP
= G 1/2" BSPP
= G 3/4" BSPP
= G 3/4" BSPP
= SAE - #10
= SAE - #10
= SAE - #12
= SAE - #12
"S" - STEEL HOUSING
"S" - STEEL HOUSING
"A" - ALUM. HOUSING
"A" - ALUM. HOUSING
= ADJUSTING SCREW
= ADJUSTING SCREW
= CAPPED
= CAPPED
= TAMPERPROOF
= TAMPERPROOF
FOR ADJUSTMENT CONTROL
FOR ADJUSTMENT CONTROL
OPTIONS SEE PAGE 0-050.0
OPTIONS SEE PAGE 0-050.0
ADJUSTMENT
ADJUSTMENT
S
S
C
C
T
T
CBPA-12-X-X-X-XX
CBPA-12-X-X-X-XX
POPPET TYPE WITH FREE REVERSE FLOW.
POPPET TYPE WITH FREE REVERSE FLOW.
COUNTERBALANCE VALVE
COUNTERBALANCE VALVE
Steel = 70/75 Ft-Lb. [95/102 Nm]
Steel = 70/75 Ft-Lb. [95/102 Nm]
Aluminum = 55/60 Ft-Lb. [74/81 Nm]
Aluminum = 55/60 Ft-Lb. [74/81 Nm]
TORQUE:
TORQUE:
Reference: 520-P-080530-EN-00/09.2015
CBPA-12
FEATURES AND BENEFITS
FEATURES AND BENEFITS
SPECIFICATIONS
SPECIFICATIONS
OPERATIONS
OPERATIONS
DESCRIPTION
DESCRIPTION
PROPORTIONAL to the load pressure is sensed at port 3 modulating
PROPORTIONAL to the load pressure is sensed at port 3 modulating
to port 1 and then blocks reverse flow until a pilot pressure INVERSELY
to port 1 and then blocks reverse flow until a pilot pressure INVERSELY
This valve is a MODULATING DEVICE that allows free flow from port 2
This valve is a MODULATING DEVICE that allows free flow from port 2
of the pump, locking the load in any position, it also provides static
of the pump, locking the load in any position, it also provides static
This valve controls moving load and preventing it from running ahead
This valve controls moving load and preventing it from running ahead
Valve is available with screw, tamperproof, and capped adjustments.
Valve is available with screw, tamperproof, and capped adjustments.
All external carbon steel parts are plated for longer life against the elements.
All external carbon steel parts are plated for longer life against the elements.
Minor internal leakage past the pilot piston purges the air from the
Minor internal leakage past the pilot piston purges the air from the
parts provides very low hysteresis (1.5%) and reliable operation.
parts provides very low hysteresis (1.5%) and reliable operation.
A unibody cage construction and with no dynamic seals on all moving
A unibody cage construction and with no dynamic seals on all moving
Hardened precision fitted poppet & cage provides reliable, long life.
Hardened precision fitted poppet & cage provides reliable, long life.
INTERNAL LEAKAGE: 5 drops/min @ 90% of crack pressure.^J
INTERNAL LEAKAGE: 5 drops/min @ 90% of crack pressure.^J
OPERATING PRESSURE: 4,000 PSI [276 Bar]
OPERATING PRESSURE: 4,000 PSI [276 Bar]
VALVE CAVITY: #C1225, See Page 0-023.0.
VALVE CAVITY: #C1225, See Page 0-023.0.
WEIGHT: 0.84 lb [0,38 kg] cartridge only.
WEIGHT: 0.84 lb [0,38 kg] cartridge only.
SKV-1228 for Viton.
SKV-1228 for Viton.
SEAL KIT NUMBER: SKN-1228 for Buna "N".
SEAL KIT NUMBER: SKN-1228 for Buna "N".
FILTRATION: 25 microns or better.
FILTRATION: 25 microns or better.
INSTALLATION: No restriction.
INSTALLATION: No restriction.
DEFINITION OF CRACK: evident at 0.06 GPM [0.25 LPM]
DEFINITION OF CRACK: evident at 0.06 GPM [0.25 LPM]
FLOW: 35.0 GPM [132 L/M] nominal. See performance chart.
FLOW: 35.0 GPM [132 L/M] nominal. See performance chart.
PROOF PRESSURE: 10,000 PSI [700 Bar]
PROOF PRESSURE: 10,000 PSI [700 Bar]
PILOT RATIO: 4 to 1
PILOT RATIO: 4 to 1
flow from port 1 to port 2.
flow from port 1 to port 2.
overload and thermal expansion protection.
overload and thermal expansion protection.
All cartridge valves are 100% functionally tested.
All cartridge valves are 100% functionally tested.
pilot line thus improving stability.
pilot line thus improving stability.
Overset protection - spring can not go solid.
Overset protection - spring can not go solid.
Adjustment screw can not be backed out of the valve.
Adjustment screw can not be backed out of the valve.
Leakproof screw adjustment.
Leakproof screw adjustment.
POPPET TYPE, ADJUSTABLE, PILOT ASSISTED, HYDRAULIC COUNTERBALANCE VALVE.
POPPET TYPE, ADJUSTABLE, PILOT ASSISTED, HYDRAULIC COUNTERBALANCE VALVE.
This unit is a DIRECT ACTING, SCREW IN CARTRIDGE STYLE,
This unit is a DIRECT ACTING, SCREW IN CARTRIDGE STYLE,
POPPET TYPE WITH FREE REVERSE FLOW.
POPPET TYPE WITH FREE REVERSE FLOW.
COUNTERBALANCE VALVE
COUNTERBALANCE VALVE
MIL-H-5606, SAE-#10, SAE-#20, etc.
MIL-H-5606, SAE-#10, SAE-#20, etc.
OPERATING MEDIA: All general purpose hydraulic fluids such as
OPERATING MEDIA: All general purpose hydraulic fluids such as
OPERATING TEMPERATURE: -40° to +250° F. [-40° to +120° C.]
OPERATING TEMPERATURE: -40° to +250° F. [-40° to +120° C.]
5000 PSI [350 Bar] = Steel - Unplated.
5000 PSI [350 Bar] = Steel - Unplated.
VALVE HOUSINGS: 2500 PSI [175 Bar] = Aluminum - Anodized.
VALVE HOUSINGS: 2500 PSI [175 Bar] = Aluminum - Anodized.
info.el@bucherhydraulics.com www.bucherhydraulics.com/commoncavity
2015 by Bucher Hydraulics, Inc., 2545 Northwest Parkway, Elgin, Illinois 60124, USA
All rights reserved.
The technical information in this catalog, may contain calculated figures (for reference only) and not actual performance data for this product.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense.
The information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to
continual improvement, we reserve the right to amend the product specifications contained in this catalogue.
©
Reference: 520-P-080530-EN-00/09.2015
CBPA-12