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Description
- Valid for Hägglunds motor CA100 S.015, CA100 S.042, CA140 S.015, CA140 S.042
- Maximum flow 1000 l/min
- Maximum pressure 350 bar
- Open loop hydraulic system
Features
- Compact and robust design
- Possible for remote pilot control of check valves
- Free wheeling and lock function
- Directional valve with detent function
- Protects the motor from overspeed at drilling applications
Product description
The valve is designed to be used with Compact motors type, CA100 S.015, CA100 S.042, CA140 S.015, CA140 S.042.
Intended use of the valve is for two speed operation using free-wheeling of one part of the motor and for locking of the motor ports at a jammed drill string in a drilling application. The valve is suitable for open loop operation with tensioned load applications. A system is required to ensure that the motor is stationary before switching from free-wheeling position into drive position.
The valve is equipped with a pilot operated pressure relief valve (3) and (4) in each motor line which can relieve flow into the opposite motor line. The pressure relief valves is adjustable within a certain pressure range and will be delivered with a pressure setting of 350 bar.
A hydraulically controlled spring return spool valve (2) allows one part of the motor to drain out to tank at freewheeling operation. The spool valve (2) is operated via an electrically controlled directional valve (5) with detent function in all positions and a pilot operated, 3-way directional valve (6). With the solenoid of the valve (5) de-energized the spool (5) remains in the last switched position. The pilot pressure to valve (6) can be adjusted within a pressure range of 7 ... 210 bar.
At free wheeling the case pressure shall be controlled with a pressure relief valve on the motor case drain line, maintaining a pressure of 1 bar ... 1.5 bar, (one of the D ports). Before the motor is put into free-wheeling the pilot control valve (5) is activated, which switches the main spool (2) and connects the motor ports AM and Cm to T.
T has to be connected to tank.
The valve is fitted with two triple pilot to open the check valves (7) and (8) with opening pressure of 2 bar, one in each motor line. The pilot to open the check valves are normally operated from opposite motor line pressure. The pilot to open the check valves can be remote controlled via pilot connection Px and Cx. The check valves allows free flow from the valve the port P and C to the load port Am respectively Cm.
At a pilot pressure above 1:3 of the pressure at load port the check valves remains open. At a possible jammed drill string the pilot pressure on valve port P or C will decrease below 2 bar and close the current check valve and prevent the drill string from winding up.
The CETOP 03 connection P-T-B-A at the blind plate (12) can be used for venting of the loaded ports Am and Cm.
Hydraulic circuit for valve
| 1) | Thread M6 |
Type code
ln order to identify Hägglunds equipment exactly, the following ordering code is used. These ordering codes should be stated in full in all correspondence e.g. when ordering spare parts.
| 01 | 02 | 03 | 04 | 05 | 06 |
| VFW-VHLC | A | 1000 | 350 |
| 01 | Free wheeling and lock valve Compact motor CA | VFW-VHLC |
| 02 | Version | A |
| Maximum flow | ||
| 03 | 1000 l/min | 1000 |
| Pressure range | ||
| 04 | Main pressure relief setting 350 bar | 350 |
| Modification 1) | ||
| 05 | 00 | |
| Design | ||
| 06 | Standard | 00 |
| Special index 1) | 01 ... 99 | |
| 1) | To be filled in by Bosch Rexroth DC-IA/EHD |
 |
| Shifting from free wheeling position into drive position during running of motor Damage on piston parts and camring
|
Technical data
General data
| Mechanical specification | Maximum operating pressure | bar | 350 |
| Maximum flow | l/min | 1000 | |
| Pilot pressure valve (6) | bar | 7 ... 210 | |
| Default setting | bar | 7 | |
| Hydraulic fluid (see data sheet RE 15414 Hydraulic fluid quick reference) | Fluid temperature range | °C | -25 … +70 |
| Viscosity range | mm²/s | 20 … 380 | |
| Recommended operating viscosity | mm²/s | 40 | |
| Weight | kg | 160 | |
| Surface treatment | Zinc plated and passivated (Cr3) | ||
| Pilot valve (electrical operated) | Solenoid protection class | IP65 (sea water protective) | |
| Solenoid current (24 VDC) | A | 1.25 | |
| Solenoid power (24 VDC) | W | 30 |
Pressure loss diagram
Pressure loss diagram - P to C1, A1 to C, Viscosity 40 mm2/s Full displacement operation mode
Δp = Pressure delta
Q = Flow
Pressure loss diagram - P to A3, A3 to C, Viscosity 40 mm2/s Free-wheeling operation mode
Δp = Pressure delta
Q = Flow
Dimensions
Dimensions in mm
| 1) | M16x30, 4 holes |
Mounting
Installation
The valve shall be located on the side of the hydraulic motor and connected to the motor hydraulically via hydraulic hoses or tubes. The valve to be mounted on the machine or on a separate bracket via 4 threaded screw holes. Threaded hole, M16x30. 4 pcs screw M16, strenght class 8.8, tightening torque 197 Nm. (See chapter "Dimensions")
C1, A1, A3, C3 to be connected to motor.
P, C to be connected to pump.
Installation drawing – VFW-VHLCA
Refer to dimensional drawing: 041 0411.
Dimensions in mm
| Connection | Description | Connection |
| P, C | Main connection | 2” SAE 6000 1) |
| A1, A3, C1, C3 | 1 ¼” SAE 6000 1) | |
| T | Drain connection | G 1 ½” |
| PX, Px, Cx | Pilot Connection | G ¼” |
| TPC, TPP, TPT, TPA1, TPC1, TPA3, TPC3 | Measure connection |
| 1) | J815C, Code 62, 414 bar |
Information
Required and additional documents
| Title | Document no | Document type |
| Hydraulic fluid quick reference | RE 15414 | Data sheet |
| VFW-VHLCA | 041 0411 1) | Dimension drawing |
| 1) | Documents only available at LHD extranet. Contact your Bosch Rexroth representative for information. |
Documents at Bosch Rexroth Media Directory
Ordering codes
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 | Hägglunds VFW-VHLCA Data Sheet | RE15384 | 2015-12-31 | English | PDF | 539k Product Groups: Hägglunds VFW-VHLCA Hydraulic free-wheeling and lock valve |
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