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Owner's Record
Date of Purchase: _________________________
Purchased from: __________________________
Serial Number: ____________________________
www.natvac.com | 800.253.5500
Defender 500
National Vacuum Equipment, Inc.
Defender 500 | 1

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Summary of Contents for NVE Defender 500

  • Page 1 Defender 500 Owner’s Record Date of Purchase: _________________________ Purchased from: __________________________ Serial Number: ____________________________ National Vacuum Equipment, Inc. www.natvac.com | 800.253.5500 Defender 500 | 1...
  • Page 2: Table Of Contents

    Cold Weather Operation ��������������������������������������������������������������12 Troubleshooting ��������������������������������������������������������������� 13 Pump overheats ��������������������������������������������������������������������������13 Pump doesn’t turn �����������������������������������������������������������������������13 No vacuum�����������������������������������������������������������������������������������14 Vacuum/Pressure Changeover Valve �����������������������������������������15 Pump Layout ��������������������������������������������������������������������16 Vacuum Lines �����������������������������������������������������������������������������16 Technical Dimensions ������������������������������������������������������������������17 Parts Diagram �������������������������������������������������������������������18 Parts List ��������������������������������������������������������������������������������������19 www.natvac.com | 800.253.5500 2 | Defender 500...
  • Page 3: Limited Warranty

    30 days of sale to end user for pump sales to be considered warrantable� All pumps received for warranty consideration must retain the original NVE serial number tag� 2� The one (1) year period shall begin the day the product is shipped...
  • Page 4 10� Certain products provided by National Vacuum Equipment, Inc� are covered by their respective manufacturer’s warranties (e�g�, engines used in the NVE engine drive packages)� These products are not covered by the National Vacuum Equipment, Inc� Manufacturer’s Warranty� 11� Final assemblers responsibility� NVE goes to great lengths to ensure the quality and proper functionality of the products it sup- plies�...
  • Page 5 • Product must be returned to NVE intact for inspection before warranty will be honored� • Product must be returned to NVE freight prepaid in the most economical way� • Credit will be issued for material found to be defective upon our inspection, based upon prices at the time of purchase�...
  • Page 6 Notes _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ _______________________________ www.natvac.com | 800.253.5500 6 | Defender 500...
  • Page 7: General Suggestions

    • High temperature asbestos-free vanes • Forced lubrication, oil pump with a remote oil tank • 4-way vacuum/pressure changeover valve • Non-return check valve • Aluminum inlet/outlet connections • “Ballast Port” cooling www.natvac.com | 800.253.5500 Defender 500 | 7...
  • Page 8: Pump Specifications

    (4.908) (9.815) Normal Use _______________________________________________________ (.3125) SQ • The Defender 500 used for the suction of air for the movement of (  1.375) liquids� Should be run at a max pressure of 21�8 PSI and a max (1.201) vacuum rate of 92%�...
  • Page 9: Drive System

    • The direction of rotation and RPM are marked on the front of the pump� • The direction of rotation required by your drive system should be determined prior to ordering the pump� www.natvac.com | 800.253.5500 Defender 500 | 9...
  • Page 10: Factory Settings

    • It is the responsibility of the installer to ensure proper vacuum relief settings, pressure relief settings and RPM� Oil Usage Checking ______________________________________________ Before starting-up the pump, check oil level in translucent tank� If refill is needed, use the recommended oils shown in the next section� Verify oil is flowing through each line at a reasonable rate. Oil lines are translucent to allow viewing oil� www.natvac.com | 800.253.5500 10 | Defender 500...
  • Page 11: Operating Instructions

    4� Mobil D�T�E� Heavy - Medium 5� Texaco Regal R & O 68 * NVE ISO 68 Oil is our recommended pump oil for the Challenger series vacuum pumps� Challenger Vacuum Pump Oil is sold by the case, six-1 gallon containers of oil per case�...
  • Page 12: Maintenance

    SCALE 1 / 4 (1.201) (1.289) SECTION F-F SCALE 1 / 2 SECTION G-G SCALE 1 / 2 Figure 3 Vanes wear control plug 108-500-S CCW SHOWN SCALE 1 / 4 www.natvac.com | 800.253.5500 12 | Defender 500...
  • Page 13: Cold Weather Operation

    Avoid freezing problems • You can avoid freezing problems by putting a small amount of diesel fuel into the pump at the end of the day� www.natvac.com | 800.253.5500 Defender 500 | 13...
  • Page 14: Troubleshooting

    Check primary or bad lubrication� shut-off and lubrication system� Frozen pump Unfreeze the vacuum pump Damaged drive system Check and replace damaged parts� Flange bolts too tight Loosen the bolts www.natvac.com | 800.253.5500 14 | Defender 500...
  • Page 15: No Vacuum

    Tighten the valves Leaking of the seals on the tank Repair or replace the seals Primary shut-off blocked Dismount and clean the parts Clogged connecting pipeline Clean the metal pipelines or replace the rubber ones� www.natvac.com | 800.253.5500 Defender 500 | 15...
  • Page 16: Pump Layout

    • The mounting of a secondary shutoff (pos� 3) is suggested in between the pump and the tank, for protecting the vacuum pump� • A silencer (pos� 4) is suggested in order to reduce sound level� www.natvac.com | 800.253.5500 16 | Defender 500...
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