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Hägglunds COCB 700, COCB 1000 Includes valves for ATEX environment

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.
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  • 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

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"

Maximum operating pressure

bar

350

Pilot pressure

bar

\u200b7 ... 350

Maximum flow

l/min

800

Pilot valve interface


NG6

Temperature range

°C

-25 \u2026 +70

Viscosity range

mm²/s

20 \u2026 380

Weight

kg

57

Overview, valve VQCB 800

Overview, valve VQCB 800 enclosed parts

Position

Description

Pcs

1

Solenoid valve

2

2

Inductive sensor

1

3

O-ring 40.87x3.53 NBR90

4

4

Screw

ASME B18.3-1/2-13UNC-2AX6 1/2

8

5

Protective cover

2

6

Valve

1

Calculation (quick stop function)

With Hägglunds hydraulic roll mill drive.

 

General

As the rubber roll mills are manually operated the time to stop the rolles is of utmost importance.

Stopping of the roll can be calculated according to following:

φ

Stop angle

°

n

Speed

rpm

Jmachine

Moment of inertia machine

kg\u2022m2

Jmotor

Moment of inertia motor

kg\u2022m2

Ts

Specific torque

Nm/bar

Δp

Pressure over motor

bar

ts

Response time hydraulic valve

s

φ = (π\u2022 n2 \u2022(Jmachine + Jmotor)/(10 \u2022 Ts \u2022 Δp)) + 6 \u2022 n \u2022ts

 

Example:

CB400 typical application for a rubber roll mill

n = 15 rpm

Jmachine = 350 kgm2

Jmotor = 18.3 kgm2

 

φ = (π\u2022152\u2022(350+18.3)/(10\u2022400\u2022350))+6\u202215\u20220.15=13.7°

Pressure loss diagram INL - OUT

Operating data

Operating data, solenoid

Wrong polarity

Wrong polarity will destroy the transient supressor

  • Ensure that the solenoid is connected correctly!

Operating data Solenoid

Supply voltage

VDC

24

Power consumption

W

30

Electric contact


DIN 43650

Contact with built-in transient supressor and indicator for electrical activation.

Electric circuit, contact

Operating data Inductive sensor - PNP Normally-open

Supply voltage

Ub

VDC

10 \u2026 30

Rated operational voltage

Ue

VDC

24

Voltage drop Ud at le

Ud

V

≤ 2.5

Rated operational current

le

mA

200

IEC 60529 protection

IP


IP68

Connection

M12x1
Cable PVC
3x0.34 mm²


L=3 m

Inductive sensor conector

Dimensions in mm

A

mm

30

B


M12x1

C

mm

56

L

m

3

Electric circuit, inductive sensor

1

Brown (1)

2

Black (4)

3

Blue (3)


COCB 700

Dimensions in mm

COCB 1000-1

Dimensions in mm

COCB 1000-3

Dimensions in mm


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.

  • Use the valve within the permissible maximum pressure.

 

Pressurized valve

Danger to life risk of injuries when working on valve in system not being depressurized.

  • Protect the system against being energized.

  • Make sure that the system is depressurized.

  • Do not disconnect any line connection, ports and components when the system is pressurized.

 

Unsafe work on the valve

Danger to life or risk of injury, damage to equipment!

  • Before carrying any work on the valve, firstly make sure that a potentially explosive atmosphere cannot occur during the period of the work.

Safety instructions for ATEX environment

Unsafe work on the valve

Danger to life or risk of injury, damage to equipment!

  • Before carrying any work on the valve, firstly make sure that a potentially explosive atmosphere cannot occur during the period of the work.

Escaping oil mist!

Risk of explosion, fire health hazard, environmental pollution.

  • Depressurize the system including valve and repair the leak.

  • Keep open flames an ignition sources from the Hägglunds valve.

Static discharge

Cleaning the valve with a dry rug may lead to explosions through electrostatic discharge that may cause severe injuries and even death.

  • Do not use a dry rug for cleaning.

Lack of grounding

Risk of explosion that may cause severe injuries and even death.

  • The valve must always be fitted to the motor or via adapter fitted to the motor. The valve must be electrically conductive and equipotential bonded with the motor which must be grounded to the system.

  • The valve are not allowed to be fitted to any separate bracket without grounding of the valve.

Painting

Risk of explosion that may cause severe injuries and even death.

  • The valve must not be painted or otherwise coated with non-conductive substances!

  • Any change at the surface protection will lead to loss of explosion protection!


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