1
2
3
50 = 50 TO 5000 PSI
50 = 50 TO 5000 PSI
30 = 50 TO 3000 PSI
30 = 50 TO 3000 PSI
15 = 50 TO 1500 PSI
15 = 50 TO 1500 PSI
PRESSURE RANGE
PRESSURE RANGE
FOR ALUMINUM OR STEEL VALVE HOUSING CONFIGURATIONS SEE PAGE 0-033.1
FOR ALUMINUM OR STEEL VALVE HOUSING CONFIGURATIONS SEE PAGE 0-033.1
2000
2000
PRESSURE DROP ( P)
PRESSURE DROP ( P)
138
138
G.P.M.(135 SUS)
G.P.M.(135 SUS)
Relieving
Relieving
PSI
PSI
30
30
20
20
1000
1000
10
10 0
10
10
Reducing
Reducing
BAR
BAR
20
20
30
30
69
69
L/M (28,5 cSt)
L/M (28,5 cSt)
3000
3000
4000
4000
114
114
76
76
[67,6]
[67,6]
2.66"
2.66"
38
38 0
38
38
207
207
276
276
76
76
114
114
Pat. # 5,546,980
Pat. # 5,546,980
[46,0]
[46,0]
1.81"
1.81"
[101,6]
[101,6]
[88,9]
[88,9]
3.50"
3.50"
4.00"
4.00"
1.31"
1.31"
[33,4]
[33,4]
HEX
HEX
.315" [8,0] HEX.
.315" [8,0] HEX.
3
2
1
SEALS
SEALS
12 = 1.062"-12 UNF
12 = 1.062"-12 UNF
BASIC
BASIC
SIZE
SIZE
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
"A" - ALUM. HOUSING
"A" - ALUM. HOUSING
"S" - STEEL HOUSING
"S" - STEEL HOUSING
N = BUNA "N"
N = BUNA "N"
V = VITON
V = VITON
PRRS-12-X-X-0-XX
PRRS-12-X-X-0-XX
= ADJUSTING SCREW
= ADJUSTING SCREW
= CAPPED
= CAPPED
= TAMPERPROOF
= TAMPERPROOF
= HANDKNOB
= HANDKNOB
= METAL HANDKNOB
= METAL HANDKNOB
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
K
K
M
M
PRESSURE REDUCING/RELIEVING VALVE
PRESSURE REDUCING/RELIEVING VALVE
PILOT OPERATED, SLIDING SPOOL
PILOT OPERATED, SLIDING SPOOL
Steel = 70/75 Ft-Lb. [95/102 Nm]
Steel = 70/75 Ft-Lb. [95/102 Nm]
TORQUE:
TORQUE:
Aluminum = 55/60 Ft-Lb. [74/81 Nm]
Aluminum = 55/60 Ft-Lb. [74/81 Nm]
Reference: 520-P-050230-EN-00/09.2015
PRRS-12
SPECIFICATIONS
SPECIFICATIONS
FEATURES AND BENEFITS
FEATURES AND BENEFITS
OPERATIONS
OPERATIONS
DESCRIPTION
DESCRIPTION
and reliable operation.
and reliable operation.
All cartridge valves are 100% functionally tested.
All cartridge valves are 100% functionally tested.
Valve is available with screw, tamperproof, capped and handknob adjustments.
Valve is available with screw, tamperproof, capped and handknob 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.
VALVE CAVITY: #C1230, See Page 0-033.0.
VALVE CAVITY: #C1230, See Page 0-033.0.
WEIGHT: 0.56 lb [0,26 kg] cartridge only.
WEIGHT: 0.56 lb [0,26 kg] cartridge only.
SKV-1231 for Viton.
SKV-1231 for Viton.
SEAL KIT NUMBER: SKN-1231 for Buna "N".
SEAL KIT NUMBER: SKN-1231 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]
INTERNAL LEAKAGE: 5 cu.in./min [.82 cc/m] @ 85% of crack pressure.
INTERNAL LEAKAGE: 5 cu.in./min [.82 cc/m] @ 85% of crack pressure.
FLOW: 24.0 GPM [91 L/M] nominal. See performance chart.
FLOW: 24.0 GPM [91 L/M] nominal. See performance chart.
PROOF PRESSURE: 10,000 PSI [700 Bar]
PROOF PRESSURE: 10,000 PSI [700 Bar]
OPERATING PRESSURE: 5,000 PSI [350 Bar]
OPERATING PRESSURE: 5,000 PSI [350 Bar]
port 3, regulating pressure at port 1.
port 3, regulating pressure at port 1.
at port 2. In this mode, the valve will also relieve from port 1 to
at port 2. In this mode, the valve will also relieve from port 1 to
pressure as the force of the spring setting regardless of the pressure
pressure as the force of the spring setting regardless of the pressure
shift and block flow from port 2 to port 1 and maintain the same
shift and block flow from port 2 to port 1 and maintain the same
in port 1 exceeds the force of the spring bias then the spool will
in port 1 exceeds the force of the spring bias then the spool will
This valve will allow flow from port 2 to port 1 until pressure
This valve will allow flow from port 2 to port 1 until pressure
pressure-regulating device for secondary circuit.
pressure-regulating device for secondary circuit.
HYDRAULIC PRESSURE REDUCING/RELIEVING VALVE, designated to act as a
HYDRAULIC PRESSURE REDUCING/RELIEVING VALVE, designated to act as a
This unit is a PILOT OPERATED, SLIDING SPOOL, SCREW IN CARTRIDGE STYLE,
This unit is a PILOT OPERATED, SLIDING SPOOL, SCREW IN CARTRIDGE STYLE,
A unique self aligning (floating) cage provides very low hysteresis
A unique self aligning (floating) cage provides very low hysteresis
Hardened precision fitted spool & cage provides reliable, long life.
Hardened precision fitted spool & cage provides reliable, long life.
Overset protection-pilot spring can not go solid.
Overset protection-pilot spring can not go solid.
Adjusting screw can not be backed out of the valve.
Adjusting screw can not be backed out of the valve.
Leakproof screw adjustment.
Leakproof screw adjustment.
Pressure in tank port (3) will add to the bias spring setting,
Pressure in tank port (3) will add to the bias spring setting,
and is limited to 2000 PSI.
and is limited to 2000 PSI.
PILOT OPERATED, SLIDING SPOOL
PILOT OPERATED, SLIDING SPOOL
PRESSURE REDUCING/RELIEVING VALVE
PRESSURE REDUCING/RELIEVING 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.
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-050230-EN-00/09.2015
PRRS-12