Артикул: RX7238
Free circulation valve Hägglunds VFCCA 1000 Includes valves for ATEX environment
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Description
- Valid for: Hägglunds motor CA, CB, CBM
- Maximum flow 1000 l/min
- Maximum pressure 350 bar
- Open and closed loop hydraulic system
Features
load errorProduct description
General
The free-circulation valve with freewheeling function is designed for use with Hägglunds Compact motors CA, CB and CBM. The valve is normally mounted on the motor via an adapter. The valve provides a means of putting the motor safely into free circulation mode. The valve is also suitable for free-wheeling mode by disengaging the pistons and allowing the cylinder block to freely rotate on its bearings. This is achieved by pressurizing the motor case and thus pushing the piston assemblies towards the motor centre. Additional circuitry is required to achieve full free-wheeling mode.
Maximum operating pressure is 350 bar and maximum flow 1000 l/min.
The valve is available in two configurations:
- VFCCA 1000 H (Free circulation valve Hydraulic operated)
- VFCCA 1000 E (Free circulation valve Electric operated 24VDC)
Notice!
Only one valve is to be used on the Hägglunds CBM.
For more than one valve, contact Bosch Rexroth DC-IA/EHD.
Function
Free circulation
The motor is put into free circulation mode by switching the main control poppet’s (510) and (520) in the valve. When the poppet´s are in neutral position they allow flow from P to Am and C to Cm. When the poppet´s are switched, P and C are blocked and Am and Cm are connected to T. The pressure in T connection must be according to the corresponding and needed charge pressure. The charge pressure is dependent of motor speed and motor type. See table “Recommended charge pressure”, Technical data in the Data Sheet for respectively motor CA, CB and CBM.
For exchange of oil in the loop the connection on the adapter FAm or FCm has to be used dependent of the direction of rotation.
The poppet´s are switched by a hydraulic pilot valve which is controlled either hydraulically or electrically and the poppet´s are spring returned to their blocked position. For electric operation a solenoid operated directional valve is fitted. The pilot pressure from the directional valve is fed by a pair of check valves (540) and (560) which are connected to the C and A motor lines respectively. The directional valve is detent. That means, if one solenoid is operated the valve spool is held in that position until the opposing solenoid is operated.
For hydraulic operation the valve is replaced by a block which connects XFW to the main poppets. The main poppet´s will normally be held over by their springs but pressure applied to XFW will cause the main poppets to switch. Connection T3 must be connected to drain line. Shifting is allowed up to a speed of 40 rpm. At speed above 10 rpm the charge pressure level has to be checked.
Free-wheeling
All compact motors can be operated in free-wheeling mode by retracting the pistons from the cam ring and allow the cylinder block to rotate freely on its bearings. The valve is operated in the same way as with free circulation but T has to be connected directly to tank. A system is required to ensure that the motor is stationary before switching from free-wheeling position into drive position. Free-wheeling is achieved by maintaining pressure into the motor case causing the piston to be lift off the cam ring and pushed in to the cylinder block. The rotating section of the motor comprising the cylinder block, pistons and cam rollers can then rotate on the main bearings without oil through the motor main ports.
The case pressure has to be generated by ensuring that there is a flow through the casing. Required case flow is depending of motor speed. See data sheet for the motors, ”oil volume for free-wheeling”. The case pressure shall be controlled with a pressure relief valve on the casing drain maintaining a pressure of 1 ... 1.5 bar, (one of the D ports). To ensure a good free-wheeling function, connect the drain line from the pressure relief valve to the main drain line T on the valve.
A typical response for a Hägglunds CA210 motor with case flow of 60 l/min would be 1 seconds to change into free-wheeling mode.
For additional information see Technical data in the Data Sheet for respectively motor CA, CB and CBM. Shifting from drive position to free-wheeling is allowed up to a speed of 10 rpm.
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| Shifting from free wheeling position into drive position during running of motor Damage on piston parts and camring
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Hydraulic circuit VFCCA 1000 H
Hydraulic circuit VFCCA 1000 E
Type code
load errorTechnical data
load errorDimensions
VFCCA 1000 H, VFCCA 1000 H Ex
Dimensions in mm
VFCCA 1000 E
Dimensions in mm
VFCCA 1000 E Ex
Dimensions in mm
Mounting
Installation
Fitting the VFCCA 1000 Valve on Hägglunds CA and CB
Refer also to the Installation and Maintenance Manual for actual motor.
 |
| Contamination of the system! Risk of damage components.
|
- Remove the SAE flanges from motor mounting surface and the plastic plugs from the adapter/valve mounting surfaces.
- Place the O-rings (5) (included in delivery) in their proper position on the adapter (4) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount the adapter (4) onto the motor with the ports in their correct position.
- Place the O-rings (5) (included in delivery) in their proper position on the valve (2) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount the valve (2) against the adapter (4) with the ports in their correct position.
- Re-instate paint finish and protect exposed surfaces.
Hägglunds CA
| Position | Description |
| 1 | 4 pcs M16 x 180 (included in delivery) |
| 2 | Valve VFCCA 1000 |
| 3 | 8 pcs 1/2 UNC x 102 (included in delivery) |
| 4 | Adapter VA 1000 10 (included in delivery) |
| 5 | 4 pcs O-ring 40.87 x 3.53 NBR90 (included in delivery) |
Hägglunds CB
| Position | Description |
| 1 | 4 pcs M16 x 180 (included in delivery) |
| 2 | Valve VFCCA 1000 |
| 3 | 8 pcs 1/2 UNC x 102 (included in delivery) |
| 4 | Adapter VA 1000 10 (included in delivery) |
| 5 | 4 pcs O-ring 40.87 x 3.53 NBR90 (included in delivery) |
Fitting the VFCCA 1000 valve on Hägglunds CBM
Refer also to the Installation and Maintenance Manual for actual motor.
 |
| Contamination of the system! Risk of damage components.
|
- Remove the SAE flanges from motor mounting surface and the plastic plugs from the adapter/valve mounting surfaces.
- Place the O-rings (8) (included in delivery) in their proper position on the adapter (7) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount the adapter (7) onto the motor with the ports in their correct position.
- Place the O-rings (5) (included in delivery) in their proper position on the adapter (4) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount the the adapter (4) onto the adapter (7) with the ports in their correct position.
- Place the O-rings (5) (included in delivery) in their proper position on the valve (2) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount the valve (2) against the adapter(4) with the ports in their correct position.
- Re-instate paint finish and protect exposed surfaces.
Hägglunds CBM
| Position | Description |
| 1 | 4 pcs M16 x 180 (included in delivery) |
| 2 | Valve VFWCB 1000 |
| 3 | 8 pcs 1/2 UNC x 102 (included in delivery) |
| 4 | Adapter VA 1000 10 (included in delivery) |
| 5 | 4 pcs O-ring 40.87 x 3.53 NBR90 (included in delivery) |
| 6 | 8 pcs 3/4-UNC x 178 (included in VA 1000 15) |
| 7 | Adapter VA 1000 15 not included in delivery |
| 8 | 2 pcs O-ring 56.74 x 3.53 NBR 90 (included in VA 1000 15) |
Note!
Mounting the valve on Hägglunds CBM, adapter R939011952, VA 1000 15 must be ordered separately!
Installation drawing - VFCCA 1000 H, VFCCA 1000 H Ex
Refer to dimensional drawing: 078 4416
Dimensions in mm
| Connection | Description | Connection |
| A, C | Main connection | SAE 1 1/4 1) |
| Am, Cm | ||
| T | Drain connection | G 1 1/4 |
| T3 | G 3/4 | |
| XFW | Pilot Connection | G 1/4 |
| MCm, MAm | Measure connection | |
| FCm FAm | Oil exchange connection | G 1 1/4 |
| 1) | J815C, Code 62, 414 bar |
Installation drawing - VFCCA 1000 E, VFCCA 1000 E Ex
Refer to dimensional drawing: 078 4421, 078 4425
Dimensions in mm
| Connection | Description | Connection |
| A, C | Main connection | SAE 1 1/4 1) |
| Am, Cm | ||
| T | Drain connection | G 1 1/4 |
| T3 | G 3/4 | |
| XFW | Plugged | G 1/4 |
| MCm, MAm | Measure connection | |
| FCm FAm | Oil exchange connection | G 1 1/4 |
| 1) | J815C, Code 62, 414 bar |
Electrical installation
Electrical circuit connection, standard
Circuit diagram standard terminal box
Electrical circuit connection, Ex
Electrical connection, Ex terminal box
Properties of the connection terminals and mounting elements
| Position | Function | Connectable line cross-section | |
| 1 | Operating voltage connection | Single-wire | 0.75 … 2.5 mm2 |
| Finely stranded | 0.75 … 1.5 mm2 | ||
| 2 | Connection for protective earthing conductor | Single-wire max. | 2.5 mm2 |
| Finely stranded max. | 1.5 mm2 | ||
| 3 | Connection for potential equalization conductor | Single-wire | 4 … 6 mm2 |
| Finely stranded min. | 4 mm2 | ||
Circuit diagram Ex terminal box
Cable gland
| Type approval |
| II 2G Ex e IIC Gb |
| Threaded connection |
| M20x1.5 |
| Protection class according to EN 60529 |
| IP66 (with correctly installed electrical connection) |
| Line diameter | mm | 7 ... 10.5 |
| Sealing |
| Outer sheath sealing |
Connection line
| Line type |
| Non-armored cables and lines (outer sheath sealing) |
| Temperature range | °C | -30 … ≥110 |
Information
load errorSafety Instructions
load errorDownloads
 | Hägglunds VFCCA 1000 Data Sheet | RE15381 | 2020-03-26 | English | PDF | 2MB Product Groups: Hägglunds VFCCA 1000 Free circulation valve |
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