DIRECTIONAL VALVES
BV10-42 Brake Release Valve, 2-Position
DESCRIPTION
A screw-in, cartridge-style, spool-type, hydraulic directional valve which operates by
pressure-to-shift spring return. It is normally used to release a spring-applied brake
whenever hydraulic power is directed to move a load.
OPERATION
In neutral, the BV10-42 allows fl ow from ➁ to ➂. When the pressure differential
between the
➀ and ➃ ports exceeds approximately 5.5 bar (80 psi), the spool has
moved far enough to close
➁ to ➂ fl ow, while opening the higher pressure of ➃ to ➁.
FEATURES
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: See Performance Chart
Internal Leakage: 82 cc/minute (5 cu. in./minute) max. at 207 bar (3000 psi)
➁ to ➂ (shifted)
Differential Pressure Required (
➃ > ➀) to Shift to Close ➁ to ➂ /
Open
➃ to ➁: 5.5 bar (80 psi)
Temperature: -40 to 120°C with standard Buna seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC10-4; See page 9.110.1
Cavity Tool: CT10-4XX; See page 8.600.1
Seal Kit: SK10-4X-TBT; See page 8.650.1
SYMBOLS
USASI/ISO:
PERFORMANCE (Cartridge Only)
4.758.1
8.6/125
6.9/100
5.2/75
3.4/50
7.5
2
FLOW RATE lpm/gpm
PRESSURE DROP bar/psi
to — ; to - - -
32 cSt/150 ssu oil at 40°C
1.7/25
3.8
1
➃➁ ➁➂
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MATERIALS
Cartridge: Weight: 0.16 kg. (0.35 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
0.34 kg. (0.75 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.010.1.
TO ORDER
BV10-42 - __ __ __ - __
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
*BSP Body
U.K. Mfr. Only
Seals
N Buna N (Std.)
V Fluorocarbon
BV10-42
4.758.2
DIMENSIONS
1.25
31.8
1.25
31.8
2.50
63.5
1.00
25.4
0.80
20.3
2.44
62.0
0.25
6.4
3.25
82.6
2.84
72.1
1.36
34.5
2.00
50.8
0.28
7.1
1.99
50.5
0.74
18.8
INCH
MILLIMETRE
ACROSS FLATS
TORQUE
25 ft-lbs
(33.9 Nm) max.
®
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