BUSCH COBRA User Manual (English)

Jasmine RosalesSep 12, 2025

Why BUSCH COBRA Water Pump does not reach the usual pressure?

T
Tiffany LyonsSep 12, 2025
If your BUSCH Water Pump isn't reaching the usual pressure, it could be because: * Suction or discharge lines are too long or the section diameter is too small. Use larger diameter or shorter lines, or seek advice from your local Busch representative. * Process deposits are on the pumping components. Flush the machine. * The machine is running in the wrong direction. Check the direction of rotation, referring to the wiring diagram for the three-phase motor. * Internal parts are worn or damaged. Contact Busch for repair.

Brand	BUSCH
Model	COBRA
Category	Water Pump
Language	English

Brand

BUSCH

Model

COBRA

Safety

Safety Warning Categories

Explains DANGER, WARNING, CAUTION, NOTICE, and NOTE message types used in the manual.

Product Description

Component Identification

Identifies key components of the vacuum pump with labels and a description table.

Operating Principle

Describes the one-stage, twin-screw pump operating mechanism.

Intended Use and Safety Warnings

Details the intended applications and associated risks of misuse.

Start Controls and Standard Features

Covers machine start controls and standard features like water cooling and sealing systems.

Optional Accessories

Lists optional accessories such as silencers and vibration diagnostic units.

Mechanical Seals

Details the available variants for mechanical sealing systems.

Transport

Transport Safety Precautions

Highlights critical safety warnings and notices for transporting the machine.

Lifting and Forklift Transport Methods

Provides instructions and diagrams for safe lifting and forklift transport of the unit.

Storage

Long-Term Storage Guidelines

Outlines procedures and conditions for storing the machine for extended periods.

Installation

Installation Conditions and Safety

Specifies environmental and safety requirements for machine installation.

Connecting Lines and Pipes

Details procedures and safety warnings for connecting input and output lines.

Suction Connection

Instructions and warnings for the suction connection, including filter recommendations.

Discharge Connection

Guidelines for the discharge connection, emphasizing unobstructed flow.

Cooling Water Connection

Specifies connection details and quality requirements for the cooling water system.

Barrier Gas System Connection

Instructions for connecting the barrier gas system and its gas requirements.

Filling Oil

Oil Filling Procedure and Precautions

Step-by-step guide for filling the machine with oil and related safety notices.

Fitting the Coupling

Coupling Installation Notes

Instructions for fitting the coupling, including torque specifications and alignment.

Electrical Connection

Electrical Installation Safety

Critical safety warnings regarding live wires and current protection during electrical installation.

Electromagnetic Compatibility (EMC)

Guidance on ensuring EMC compliance for the machine and its operating environment.

Machine without Variable Speed Drive

Specific electrical connection considerations for machines without a variable speed drive.

Wiring Diagram Three-Phase Motor

Provides wiring diagrams for connecting the three-phase motor in delta and star configurations.

Rotation Direction Warning

Important notice regarding the correct direction of motor rotation to prevent damage.

Electrical Connection of the Cooling Liquid Pump

Safety instructions for connecting the cooling liquid pump, emphasizing qualified personnel.

Wiring Diagram Cooling Liquid Pump

Shows wiring diagrams for the cooling liquid pump in delta and star configurations.

Electrical Connection of Monitoring Devices

Details for connecting monitoring sensors and associated warnings.

Resistance Thermometer Wiring

Wiring diagram and specifications for the resistance thermometer.

Vibration Diagnostic Unit Wiring

Information on wiring the vibration diagnostic unit, referencing a separate sheet.

Commissioning

Commissioning Safety and Precautions

Safety warnings about hot surfaces and noise, plus notices about pre-commissioning checks.

Recommendations on Operation

General advice and best practices for operating the vacuum pump.

Operating Frequency

Guidance on recommended operating frequencies and limitations.

Stop & Start Procedures

Recommendations for avoiding frequent stop-start cycles and proper start procedures.

Operation with Argon

Specific operational limits and conditions when pumping high Argon concentrations.

Maintenance

Maintenance Safety Warnings

Crucial safety warnings related to electrical hazards, hot surfaces, and hazardous materials during maintenance.

Maintenance Schedule

Details the recommended maintenance intervals and tasks for the machine.

Monthly Maintenance Tasks

Lists routine monthly checks for oil and cooling liquid levels and general inspection.

Yearly Maintenance Tasks

Details annual maintenance activities including visual inspection and electrical connection checks.

5000 Hour / 1 Year Maintenance

Specifies tasks for every 5000 hours or 1 year, including oil and cooling liquid changes.

16000 Hour / 4 Year Maintenance

Outlines major maintenance tasks required every 16000 hours or 4 years, including overhaul.

Oil Level Inspection

Procedure for checking the oil level in the machine.

Cooling Liquid Level Inspection

Procedure for checking the cooling liquid level in the machine.

Oil Change

Step-by-step guide for changing the oil, including important notices about oil type.

Cooling Liquid Change

Warnings and instructions for safely draining the cooling liquid.

Calibration Procedure of Electrical Devices

Procedures for calibrating electrical monitoring devices.

Resistance Thermometer Calibration

Procedure for calibrating the resistance thermometer.

Vibration Sensor Calibration

Procedure for calibrating the vibration sensor.

Overhaul

Overhaul Safety and Assembly Warnings

Safety warnings for hazardous materials and notices regarding proper assembly during overhaul.

Decommissioning

Decommissioning Safety and Procedures

Safety warnings for decommissioning and instructions for shutting down and disconnecting the machine.

Dismantling and Disposal

Instructions for dismantling and proper disposal of the machine and its components.

Spare Parts

Spare Parts Usage Notice

Recommendations and notices regarding the use of genuine Busch spare parts for optimal performance and warranty.

Troubleshooting

Troubleshooting Safety

Safety warnings related to electrical hazards and hot surfaces during troubleshooting.

Machine Does Not Start Issues

Common causes and remedies for the machine failing to start.

Machine Performance Issues

Addresses problems like failure to reach pressure, noisy operation, overheating, and oil condition.

BUSCH COBRA User Manual

Table of Contents

Questions and Answers:

BUSCH COBRA Specifications

Summary