Table of Contents
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DIRECTORR® DIRECT-DRIVE VACUUM PUMP
Do not block the exhaust port. Pressure will build up with the
potential of oil case bursting with possible injury to personnel.
Pumps not recommended for filtration, aspiration or drying
Gardner Denver Welch Vacuum Technology, Inc.
5621 W. Howard Street
Niles, IL 60714
Phone: (847) 676-8800
Fax: (847) 677-8606 (Technical Support)
E-Mail: welchvacuum@gd-thomas.com
Web-Page: www.welchvacuum.com
OWNER'S MANUAL
Pumps being run continuously above 1 torr should use an
FOR
MODELS:
8905
8907
8912
8917
8920
8925
WARNING
WARNING
exhaust oil recycler.
WARNING
electrophoresis gels.
For outside of U.S. and Canada, contact your local
Gardner Denver sales office, see back page
Part No. 67-1483R2.5
Printed in USA
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Table of Contents
Troubleshooting
Related Manuals for Welch 8925
Summarization of Contents
Introduction and Safety
Warnings and Cautions
Explains the meaning of WARNING and CAUTION labels and symbols.
Section 01 - Installation
Installation Procedures
Covers unpacking, mounting, location, and connections for the pump.
Section 02 - Pump Features & Principles of Operation
Pump Operation Principles
Explains how rotary-vane vacuum pumps function, including key mechanisms.
Pump Lubrication and Maintenance
Details on oil type, lubrication, and exhaust/ballast functions.
Section 03 - Specifications
Pump Specification Chart
Table detailing technical specifications for various pump models.
Section 04 - Motor Specifications, Power / Features
Motor Specifications and Voltage Settings
Covers motor specs and procedures for changing voltage settings.
Section 05 - Operation
Starting and Shutdown Procedures
Step-by-step guide for initial pump startup and safe shutdown.
Section 06 - Maintenance
Vacuum Problems and Oil Changes
Troubleshooting vacuum issues and procedures for oil maintenance.
Lip Seal / Gasket Change
Instructions for replacing lip seals and gaskets on specific models.
Section 07 - Trouble Shooting
Trouble Shooting Guide
A comprehensive guide to diagnosing and resolving pump issues.
Section 08 - Repair Kits
Repair Kit Information
Details on shaft seal, minor, and major repair kits.
Section 09 - Accessories
Pump Oil and Exhaust Filters
Catalog of available pump oils and exhaust filters.
Section 10 - Drawings and Speed Curve
Speed Curve and Dimensional Drawing
Performance curves and diagrams showing pump dimensions.
Exploded Views and Parts Lists
Component breakdowns for various pump models and modules.
Section 11 - Warranty
Warranty Terms and Procedures
Details of product warranty, coverage, and return authorization.
Section 12 - MSDS Sheet
MSDS Information Sections
Covers identification, hazards, physical properties, and safety data.
Contact Information
Regional and Repair Contacts
Contact details for different geographical regions and repair services.
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