Артикул: RX7228
Cross-over valve Hägglunds COCB 700, COCB 1000 Includes valves for ATEX environment
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Description
- Valid for: Hägglunds motor CA, CB, CBM
- Maximum flow 700 l/min, 1000 l/min
- Maximum pressure 350 bar
- Open and closed loop hydraulic system
Features
- Compact and robust design
- Mounted directly on Hägglunds motors
- Oil exchange system for closed loop (COCB 1000-3)
- Protects the motor from high pressure peaks
- Provides cavitation protection
Product description
General
The cross over valve COCB is designed for use with Hägglunds CA, CB and CBM motors and provides cross line relief and cavitation protection. The valve is suitable for open and closed hydraulic loop system and is normally mounted on the opposite side to the main flow. The pressure relief cartridge ensures protection of the motor from pressure shock. These relief valves have a standard setting of 350 bar but can be delivered with preset level 280 bar, 300 bar and 330 bar.
Full flow anti-cavitation check valves protect the motor and also allow the application of external charge pressure. For use in closed loop application a oil exchange system is available. Oil exchange of the closed loop system during operation is achieved via the main cartridge and charge pressure relief valve in the oil exchange system.
The charge pressure relief valve has a standard setting of 15 bar but is adjustable down to 3 bar.
Two main valve configurations:
COCB 700-1, COCB 1000-1 (Cross- over valve)
COCB 1000-3 (Cross-over valve with oil exchange system)
Info
The pressure settings of the cross over valves are dependent of the back pressure, possible charge pressure in S-line. The charge pressure in S-line will be added to the pressure setting of the pilot valves means that the opening pressure will be additional higher than the main pressure relief settings.
Function
The cartridges within the cross-over valve are mounted in a manifold block and retained by screws on covers with all connections to create the valve function within the block. The main cartridges (610) and (620) are controlled by the pilot valves (611) and (621). If the pressure in either motor line, (Am) or (Cm) rises to the pilot valve setting the corresponding main cartridge (610) or (620) will open and flow will pass through the check valve (630) or (640) and into the other motor line thus relieving the over pressure. There is no flow through this valve except when relieving. When there is back pressure in the system it has to be added to the settings of the main relief valve setting. The pressure setting of the main relief cartridges should always be higher than the pump relief valve setting.
On the basic valve COCB 700-1, 1000-1, an external charge pressure can be applied to port S. The charge pressure will appear in both motor lines through the anti-cavitation check valves (630) and (640).
The pressure settings of the cross over valves are dependent of the back pressure, possible charge pressure in S-line. The charge pressure in S-line will be added to the pressure setting of the pilot valves means that the opening pressure will be additional higher than the main pressure relief settings.
The valve can also be supplied with a screw-on block which carries the oil exchange system, COCB 1000-3. This function is particularly suitable for closed loop systems. The charge pressure is applied to the motor lines at the pump and the selector valves (613) and (623) select to flush the oil in the low pressure line through the corresponding main cartridge (610) or (620) to the charge pressure relief valve (660) and to port T3. This function requires S to be plugged. The charge pressure relief valve (660) has a standard setting of 15 bar but can be reduced down to 3 bar, ¼ turn on the adjustment screw change the setting with 3 bar.
Hydraulic circuit COCB 700-1, COCB 1000-1
Hydraulic circuit COCB 1000-3
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 | 07 | 08 |
| COC | B |
| 01 | Cross-over valve | COC |
| 02 | Version | B |
| Maximum flow | ||
| 03 | 700 l/min | 0700 |
| 1000 l/min | 1000 | |
| Main pressure relief settings | ||
| 04 | 280 bar | 280 |
| 300 bar | 300 | |
| 330 bar | 330 | |
| 350 bar | 350 | |
| Type of valve | ||
| 05 | Cross-over valve | 1 |
| Cross-over valve with Oil exchange system (only for 1000 l/min, charge pressure 15 bar) | 3 | |
| Explosive environment | ||
| 06 | Non explosive environment | 0 |
| Explosive environment | 1 | |
| Modification 1) | ||
| 07 | 00 | |
| Design | ||
| 08 | Standard | 00 |
| Special index 1) | 01 ... 99 | |
| 1) | To be filled in by Bosch Rexroth DC-IA/EHD |
Note!
Mounting the valve on CBM, an adapter must be ordered separately, see chapter "Mounting" - section "Fitting the valve on Hägglunds CBM"
Technical data
General data
| Type | COCB 700-1 | COCB 1000-1 | COCB 1000-3 | ||
| Maximum operating pressure | bar | 350 | |||
| Default charge pressure setting | bar | 15 | |||
| Adjustment range for charge pressure relief valve 660 / 661 | bar | 3 ... 15 | |||
| Maximum flow (see section "Pressure loss diagram") | l/min | 700 | 1000 | ||
| 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 | |||
| Weights | Cross-over valve | kg | 25 | 30 | 35 1) |
| Surface protection | Surface coating | According to DIN 50979, Fe//ZnNi8//An/T2 | |||
| Standard Painting System | SS-EN ISO 12944 C3, durability range M (Std colour RAL 2002) | ||||
| 1) | With purge circuit |
Explosion protection information, ATEX
| Area of application according to directive 2014/34/EU | I M2, II 2G, II 2D, II 3G, II 3D | |
| Protection of the valve by liquid immersion according to | k (EN 13463-8) | |
| Constructional safety according to | c (EN 13463-5) | |
| Maximum surface temperature | °C | + 100 |
| Temperature class | T4 | |
| Conforms to “Equipment and components intended for use in potentially explosive atmospheres and in underground mines” | EN 1710 | |
| ATEX Classification of valve | II 2 G D c k T4 / I M2 c k T4 | |
| Ambient temperature range | °C | -25 … +50 |
Pressure loss diagram
Pressure loss diagram COCB 700, Am to Cm, Cm to Am (additive to pressure setting of valve)
Viscosity 40 mm2/s
Pressure loss diagram COCB 700, S to Am, S to Cm (over check valves)
Viscosity 40 mm2/s
Pressure loss diagram COCB 1000-1, Am to Cm, Cm to Am (additive to pressure setting of valve)
Viscosity 40 mm2/s
Pressure loss diagram COCB 1000-1, S to Am, S to Cm (over check valves)
Viscosity 40 mm2/s
Pressure loss diagram COCB 1000-3, Am and Cm to T3 (shown with charge pressure relief valve set to 15 bar)
Viscosity 40 mm2/s
Dimensions
COCB 700
Dimensions in mm
COCB 1000-1
Dimensions in mm
COCB 1000-3
Dimensions in mm
Mounting
Installation
Fitting the 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 valve mounting surface.
- Place the O-rings (included in delivery) in their proper position on the valve mounting surface. Use clean grease to keep O-rings fixed during assembly.
- Mount the valve against the motor with the ports in their correct position.
- Re-instate paint finish and protect exposed surfaces.
 |  |
| Hägglunds CA, COCB 1000 | Hägglunds CB, COCB 1000 |
| Position | Description |
| 1 | 8 pcs Screws 1/2 UNC x 203 (included in delivery) |
| 2 | Valve COCB 700/1000 |
| 3 | 2 pcs O-ring ø 40.87x3.53 NBR 90 (included in delivery) |
Note!
For CA motors:
To facilitate tandem motor mounting, brake mounting or where 4 ports are required for the flow, an adapter is available
(see Data sheet RE 15383 Hägglunds valve adapters)
Fitting the 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 (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 (included in delivery) in their proper position on the valve (2) mounting surface.
- Use clean grease to keep O-rings fixed during assembly.
- Mount valve (2) against the adapter with the ports in their correct position.
- Re-instate paint finish and protect exposed surfaces.
Note!
Mounting the valve on Hägglunds CBM, adapter R939011952, VA 1000 15 must be ordered separately!
Hägglunds CBM, COCB 1000
| Position | Description |
| 1 | 8 pcs Screws 1/2 UNC x 203 (included in delivery) |
| 2 | Valve COCB 700/1000 |
| 3 | 2 pcs O-ring ø 40.87x3.53 NBR 90 (included in delivery) |
| 4 | Adapter VA 1000 15 not included in delivery |
| 5 | 8 pcs 3/4-UNC x 178 (included in VA 1000 15) |
| 6 | 2 pcs O-ring 56.74 x 3.53 NBR 90 (included in VA 1000 15) |
Installation drawings
Installation drawing COCB 700-1
Refer to dimensional drawing: 078 4536
Dimensions in mm
| Connection | Description | Connection |
| Am | Main connection | SAE 1 1/4 1) |
| Cm | ||
| S 2) | Charge pressure connection | G 1 |
| MA, MC | Test connection | G 1/4 |
| HA, HC | External Pilot |
| 1) | J518C, Code 62, 414 bar |
| 2) | Former T2 connection. S valid for valves with serial number from 1319. |
Installation drawing COCB 1000-1
Refer to dimensional drawing: 078 4427
Dimensions in mm
| Connection | Description | Connection |
| Am | Main connection | SAE 1 1/4 1) |
| Cm | ||
| S 2) | Charge pressure connection | G 1 |
| MA, MC | Test connection | G 1/4 |
| HA, HC | External Pilot |
| 1) | J518C, Code 62, 414 bar |
| 2) | Former T2 connection. S valid for valves with serial number from 1319. |
Installation drawing COCB 1000-3
Refer to dimensional drawing: 078 4428
Dimensions in mm
| Connection | Description | Connection |
| Am | Main connection | SAE 1 1/4 1) |
| Cm | ||
| S 2) | Charge pressure connection | G 1 |
| T3 | Oil exchange outlet | |
| MA, MC | Test connection | G 1/4 |
| HA, HC | External Pilot |
| 1) | J518C, Code 62, 414 bar |
| 2) | Former T2 connection. S valid for valves with serial number from 1319. |
Information
Required and additional documents
| Title | Document no | Document type |
| Hydraulic fluid quick reference | RE 15414 | Data sheet |
| Hägglunds valve adapters | RE 15383 | |
| COCB 700 | 078 4536 1) | Dimension drawing |
| COCB 1000-1 | 078 4427 1) | |
| COCB 1000-3 | 078 4428 1) |
| 1) | Documents only available at LHD extranet. Contact your Bosch Rexroth representative for information. |
Documents at Bosch Rexroth Media Directory
Safety Instructions
Warning signs
In this manual you will find the following signs which indicate a potential hazard, which can or will cause personal injury or substantial property damage. Depending on the probability if the hazard, and how serious the injury or property damage could be, there are three levels if classification.
| Warning sign (warning triangle) | Draws attention to the hazard |
| Signal word | Identifies the degree of hazard |
| Type of risk | Specifies the type or source of the hazard |
| Consequences | Describes the consequences of non-compliance |
| Precautions | Specifies how the hazard can be prevented |
The signal words have the following meaning:
| Warning sign, signal word | Meaning |
 | Indicates a dangerous situation which will cause death or severe personal injuries if not avoided. |
 | Indicates a dangerous situation which may cause death or severe personal injuries if not avoided. |
 | Indicates a dangerous situation which may cause minor or medium personal injuries if not avoided. |
 | Material damage: the product or its environment could be damaged. |
General safety instructions
 |
| Danger from excessively high pressure! Danger to life or risk of injury, damage to equipment! Using the valve above the permissible maximum pressure can cause valve burst and hydraulic fluid to escape under high pressure.
|
| Pressurized valve Danger to life risk of injuries when working on valve in system not being depressurized.
|
| Unsafe work on the valve Danger to life or risk of injury, damage to equipment!
|
Safety instructions for ATEX environment
 |
| Unsafe work on the valve Danger to life or risk of injury, damage to equipment!
|
 |
| Escaping oil mist! Risk of explosion, fire health hazard, environmental pollution.
|
| Static discharge Cleaning the valve with a dry rug may lead to explosions through electrostatic discharge that may cause severe injuries and even death.
|
| Lack of grounding Risk of explosion that may cause severe injuries and even death.
|
| Painting Risk of explosion that may cause severe injuries and even death.
|
Ordering codes
Downloads
 | Hägglunds COCB 500 and COCB 1000 Data Sheet | RE15376 | 2020-10-31 | English | PDF | 1.3MB Product Groups: Hägglunds COCB◡700, COCB◡1000 Cross over valve for Hägglunds motors |
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