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Welch WOB-L 2561B-50 Owner's Manual

Wob-l series piston vacuum pump
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Welch-Ilmvac
5621 W. Howard Street
Niles, IL 60714
Phone: (847) 676-8800 (Technical Support)
Fax: (847) 677-8606
E-Mail: gdwelchvacuum@gardnerdenver.com
Web-Page: www.welchvacuum.com
WELCH-ILMVAC
OWNER'S MANUAL
®
WOB•L
PISTON VACUUM PUMP
2561B-50 2563B-24
2561C-50 2563C-24
2561C-56 2563C-25
Not recommended for pumping acid, base or organic vapors or gases.
Be sure to properly identify intake and discharge before using pump.
FOR
MODELS:
Warning
Warning
See section 2.5
For outside of U.S. and Canada, contact your local
Gardner Denver sales offi ce.
Part No. 642826
Printed in USA

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Summary of Contents for Welch WOB-L 2561B-50

  • Page 1 WELCH-ILMVAC OWNER’S MANUAL ® WOB•L PISTON VACUUM PUMP MODELS: 2561B-50 2563B-24 2561C-50 2563C-24 2561C-56 2563C-25 Warning Not recommended for pumping acid, base or organic vapors or gases. Warning Be sure to properly identify intake and discharge before using pump. See section 2.5 For outside of U.S.
  • Page 2 INSTRUCTION WARNING AND CAUTION PLEASE READ BEFORE OPERATION While reading your manual, please pay close attention to areas labeled: WARNING AND CAUTION. The description of each is found below. WARNING Warnings are given where failure to observe instruction could result in injury or death to people.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Section 01 - Safety Information 1.10 Warning to prevent injury 1.20 Warning to reduce risk of electrical shock 1.30 Warning to reduce risk of electrocution 1.40 Warning to reduce risk of explosion or fi re Section 02 - Installation 2.10 Introduction 2.20...

  • Page 4: Section 01 - Safety Information

    Never operate this product if it has a damaged cord or plug. If it is not working properly, has been dropped, damaged or has fallen into water, please return the product to a Welch service center for examination and repair.

  • Page 5: Section 02 - Installation

    The intake fi tting is a NW25-fl ange / 1/4”NPT. A muffl er is supplied for the exhaust. WARNING Bursting Hazard- use on exhaust port the silencer or air handling parts suitable for pressures not less than 100 PSIG Be sure to call Welch technical service prior to start-up at (847) 676-8800 if you have any questions.

  • Page 6: Electrical Power

    Serious damage may occur to the motor if it is connected to an improper voltage. All Welch pumps must be grounded. Grounding reduces the risk of electric shock in the event of an electrical short circuit. The plug must be plugged into a properly grounded outlet. Consult your local electrical codes if you have doubts.

  • Page 7: Vacuum Connections

    All other wetted parts are stainless steel. If there is a chance liquid may be drawn from the process under evacuation, Welch recommends a liquid trap be placed between the process and the pump. A simple liquid trap is a fi ltering fl ask.
  • Page 8 The symptom of a high water vapor load is if you have droplets coming out of the exhaust port. If you see droplets of water, Welch recommends you use a cold trap to capture the water before entering the pump or dilute the water vapor stream by adding dry nitrogen to the gas fl...

  • Page 9: Section 03 - Operation

    Review the power requirements as described in Section 2.60. Welch recommends running the pump for a few minutes to warm it up, before use. The warm-up improves the pumps ability to handle humid air.

  • Page 10: Section 05 - Troubleshooting

    5.10 VACUUM PROBLEMS Welch dry vacuum pumps are 100% oil-free. The pump employs a non-lube piston and cylinder. Leakage, contamination and unusual outgassing are the general causes of problems with poor vacuum. To operate at maximum effi ciency a system must be thoroughly clean. If the system is completely clean and free from leaks, and unwarranted vacuum problems still exist, the pump should be checked.

  • Page 11: Specifi Cation Chart

    Section 6: SPECIFICATION 6.10 SPECIFICATION CHART Welch Model 2563 Free Air Displacement CFM (L/min.) @ 60Hz 2.12 (60) CFM (L/min.) @ 50Hz 1.77 (50) Ultimate Pressure Torr (mbar) 5 (7) Motor Horsepower Horsepower Tubing needed I.D. in Inches (mm) 1/4 (7)

  • Page 12: Section 07 - Warranty

    The liability of Welch-Ilmvac Inc. under this warranty is limited to servicing, adjusting, repairing or replacing any unit or component part which in the judgment of Welch- Ilmvac Inc. has not been misused, abused or altered in any way causing impaired performance or rendering it inoperative.
  • Page 13 Section 8: PARTS LIST AND EXPLODED VIEWS 8.10 MODEL 2563 DIMENSIONAL...
  • Page 14 8.20 MODEL 2563 PARTS LIST AND EXPLODED VIEW Item No. Part No. Description Service Kit Gasket Kit Foot Kit 2563K-03 2567K-04 2500K-04 2563K-01** Connecting Rod Assembly 2567K-02 Valve Plate Assembly Cylinder O-Ring Valve Plate Head Gasket Cylinder Sleeve Piston Cup - XL9650 Suction Cup Feet Retainer Hold Down Screw * These parts are only available in kits.
  • Page 15 If you are looking for a pump to handles these types of conditions, contact a Welch representative and they will be able to assist you in selecting the correct pump for your application.
  • Page 16 Welch-Ilmvac 5621 W. Howard Street Niles, IL 60714 Phone: (847) 676-8800 (Technical Support) Fax: (847) 677-8606 E-Mail: gdwelchvacuum@gardnerdenver.com Web-Page: www.welchvacuum.com Copyright© 1997-2007 Gardner Denver Welch Vacuum Technology, Inc. Welch is registered trademarks of Gardner Denver...

This manual is also suitable for:

Wob-l 2561c-50Wob-l 2563b-24Wob-l 2563c-25Wob-l 2563c-24Wob-l 2561c-56

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