NVE Challenger Series User manual

Owner’s Manual
B250 Tri-Lobe Blower
800-253-5500 |www.natvac.comDesigned. Built. Supported in the USA.
MADE IN THE USA
National Vacuum Equipment, Inc.
National Vacuum Equipment, Inc.
National Vacuum Equipment, Inc.

2| B250 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
for reference only.
© 2020 National Vacuum Equipment, Inc.
Revision: 1 (Release) January 2020
No part of this manual may be reproduced without the wrien permission of
National Vacuum Equipment, Inc.
B250 BLOWER
Owner’s Record
Date of Purchase: _________________________
Purchased from: __________________________
Serial Number: ____________________________

B250 Challenger Series | 3www.natvac.com | 800.253.5500 Weights and measurements are
for reference only.
CONTENTS
Introduction ................................................................................. 5
About National Vacuum Equipment, Inc.......................................5
Our History ........................................................................................5
Limited Warranty......................................................................... 6
Warranty.............................................................................................6
Warranty Procedures.......................................................................7
Disclaimer .................................................................................... 7
Condition Of Sales ...................................................................... 7
Safety Instructions...................................................................... 8
Safety Precautions.........................................................................10
B250 Tri-Lobe Blower................................................................. 11
General Blower Operation..............................................................11
Location of Serial Number .............................................................11
Specifications.............................................................................12
Operating Environment................................................................. 12
Operating Limits ............................................................................. 12
Performance.................................................................................... 13
Airflow Control ................................................................................ 13
Sound Control ................................................................................ 13
Rotation and Airflow ...................................................................... 14
Handling ........................................................................................... 15
Preservation .................................................................................... 16
Limitations of Use........................................................................... 17
Installation Considerations.......................................................18
Belt Drive System........................................................................... 19
Drive Sha System ....................................................................... 20
Diesel Engine Precautions........................................................... 20
Direct Coupler Installation & Alignment..................................... 21
Hydraulic Drive................................................................................ 21
Plumbing and Piping ..................................................................... 22
Recommended Accessories..................................................... 22

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Exhaust Silencer............................................................................ 22
Intake Filter..................................................................................... 23
Four-Way Valve............................................................................... 23
Inlet Check Valve ........................................................................... 24
Primary Shuto.............................................................................. 24
Secondary Shuto/Moisture Trap.............................................. 24
Operation ................................................................................... 24
Preliminary Check on Stored Units ............................................ 24
Initial Start Up ................................................................................ 25
Prior To Regular Start Up ............................................................. 25
Operating The Blower.................................................................... 26
Stopping The Blower .................................................................... 26
Cold Weather Operating................................................................27
Maintenance ..............................................................................28
Before Beginning Maintenance .................................................. 28
Procedure for Removal of Pressure Retaining Device............ 28
Four-Way Valve Adjustment ......................................................... 29
Relief Valve Seing Instructions................................................. 30
Pressure Relief Valve .................................................................... 30
Pressure Relief Valve Adjustment Procedure........................... 30
Vacuum Relief Valve....................................................................... 31
Pressure Relief Valve Adjustment Procedure............................ 31
Maintenance Schedule................................................................. 32
Clean Out Procedure If Flooded ................................................. 33
Rebuilding ....................................................................................... 33
Maintenance Notes....................................................................... 34
Troubleshooting ........................................................................ 35
Change Sump Gear Oil ..................................................................37
Approximate Oil Capacities ......................................................... 39
Blower Dimensions Diagram ....................................................... 40
Blower Parts Diagram.................................................................... 41
Blower Parts List............................................................................ 42

B250 Challenger Series | 5www.natvac.com | 800.253.5500 Weights and measurements are
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INTRODUCTION
General Information
About National Vacuum Equipment
Congratulations! You now own a quality vacuum/pressure
blower proudly manufactured in the U.S.A. by National Vacuum
Equipment, Inc. You have not only acquired a superior piece
of equipment from a qualified dealer, you have hired a team of
vacuum experts. We stand ready to work with your dealer to
answer your questions and provide you with the information
necessary to keep your equipment in peak working condition.
Thank you for puing your trust in National Vacuum Equipment.
Our Mission
We are dedicated to the production and wholesale distribution
of quality vacuum system products at a reasonable price, on a
timely basis. We are a “one-stop shop” for manufacturers and
distributors of vacuum equipment.
Our History
National Vacuum Equipment, Inc. was founded in 1980 by Bruce
Luoma. The Company started as a retailer of vacuum pumps.
Soon aer it started, the Company secured the rights to exclusive
distribution of the Baioni vacuum pumps in North America.
This helped the Company to evolve into its current status as a
wholesale supplier. To reach the goal of becoming a full service
supplier of vacuum system components, the Company began
fabrication of its own line of components, purchased and
developed its own line of vacuum pumps and blowers, and began
purchasing for resale, various valves and accessories.
Today, NVE has full service machine, fabrication and powder-
coating shops complete with CNC-controlled production
equipment designed for close tolerance work. The company has a
highly trained sta, all of whom are dedicated to quality.

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Weights and measurements are
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LIMITED WARRANTY
Warranty
National Vacuum Equipment, Inc. guarantees that the product
it provides is free of manufacturer defects, including; materials
and workmanship. Equipment must be installed by a trained and
qualified installer according to guidelines established by National
Vacuum Equipment, Inc. Properly installed and maintained product
is warranted for a period of one (1) year subject to the following
conditions:
1. A properly completed warranty registration card must
be received by us within 30 days of sale to end user for
blower sales to be considered warrantable. Or use the
QR code on the right to fill out warranty registration
online (hps://natvac.com/warranty-registration/).
All blowers 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
from our warehouse, unless we are provided with an authentic copy
of the original resale invoice, in which case the one (1) year period
shall begin at such invoice date.
3. The covered product must be used in an application for which it
was intended. We do not recommend our product for particular
uses or applications.
4. Damage caused by improper use or lack of proper maintenance is
not warrantable.
5. Manufacturer’s liability under this, or any other warranty whether
expressed or implied, is limited to repair of or at the manufacturers’
option, replacement of parts which are shown to have been
defective when shipped.
6. Manufacturer’s liability shall not be enforceable for any product
until National Vacuum Equipment, Inc. has been paid in full for such
product.
7. Manufacturer’s liability for incidental and consequential damage is
hereby excluded to the full extent permied by law.
8. Manufacturer’s liability as stated herein cannot be altered except in
writing signed by an oicer of National Vacuum Equipment, Inc.
9. Certain products provided by National Vacuum Equipment,
Inc. are covered by their respective manufacturers’ warranties
(e.g., engines used in the NVE engine drive packages). These
products are not covered by the National Vacuum Equipment, Inc.
Manufacturers’ Warranty.
10.Equipment must be installed by a trained and qualified installer
according to guidelines established by National Vacuum
Equipment, Inc.

B250 Challenger Series | 7www.natvac.com | 800.253.5500 Weights and measurements are
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Warranty Procedures
Should a potential warranty situation arise, the following proce-
dures must be followed:
• Contact your dealer immediately upon the occurrence of the
event and within the warranty period.
• Customer must receive a return goods authorization (RGA)
before returning product.
• All serial-numbered products must retain the NVE serial
number tag to be qualified for warranty.
• 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.
DISCLAIMER
The information presented in this owner’s manual is accurate per
the date of publication. National Vacuum Equipment reserves
the right to make product design and documentation material
changes without notice.
Furthermore, National Vacuum Equipment is not obligated
to implement the aforementioned alterations into already
manufactured equipment. Should any discrepancy in
documentation or design arise, contact should be made with
National Vacuum Equipment for clarification. The information
presented in this manual is meant for reference only. This
manual cannot represent every possible application for this NVE
product. Thus, it is the installer and/or end user’s responsibility
to ensure the system is designed, installed, and operated in a
safe manner. Furthermore, this manual is applicable only to the
NVE product(s) documented herein. It is not applicable to the
entire system of which the NVE product is a component of. Thus,
the system designer should be consulted for proper, safe, and
eicient operation of any system containing NVE components.
NVE cannot assume any responsibility for damage and/or injury
resulting from improper system operation.

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Weights and measurements are
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National Vacuum Equipment considers safety an essential
component in the use of its products. There is no replacement
for proper training of personnel who will be in contact with NVE
products. This manual should be thoroughly read and understood
prior to installing, operating, maintaining, or servicing the NVE
product documented herein. Furthermore, as this NVE product is
only a component in an engineered system, the system designer
and any ailiated documentation should also be consulted.
Equipment safety decals should also be referenced and kept in a
clean, and easily visible condition. Contact NVE for replacement
labels if needed.
This symbol is a “safety aention symbol”
and appears with most safety statements
in this manual. Pay special aention
to these symbols and associated
text as they highlight a hazard that, if
not avoided, can result in equipment
damage, injury, and/or death.
It is the installer’s and end user’s
responsibility to read and understand
the inclusions of this, ailiated manuals,
and related documentation before
operating the associated equipment.
Failure to operate any system containing
NVE components according to OEM
specifications and proper training can
result in serious injury or death! ALWAYS
provide all users with proper training.

B250 Challenger Series | 9www.natvac.com | 800.253.5500 Weights and measurements are
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Indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
Indicates a hazardous situation which can cause damage to
machine, personal property, and/or the environment, or cause the
equipment to operate improperly.
Indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.

10 | B250 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
for reference only.
Safety Precautions
It is vitally important that safety considerations be implemented
in the operation and service of this and other NVE products. While
outlining every safety precaution is beyond the scope of this manual,
some of the most important precautions include the following:
• The blower and associated drive system include rotating
components. Before any service, ensure the equipment is locked
out and that accidental startup cannot occur. Also, ensure proper
guarding is present on the components.
• This blower and associated components operate at elevated
temperatures that can cause severe burns. Be sure equipment is
cool before conducting any service or maintenance operations.
• Never operate the system without adequately sized and
functional pressure relief valves in position. This blower is
capable of producing pressures above most tank manufacturers’
specifications.
• Use suitable liing equipment to li & move the blower/blower
package. Improper liing can cause injury and/or damage to the
equipment.
• Do not expose any part of your body to vacuum. This blower is
capable of producing vacuum levels that can cause serious injury.
• Never disconnect any fiings/hoses with the blower operating.
• Ensure that appropriate Personal Protective Equipment is being
worn when operating and/or servicing the equipment.
• This system must not be used to convey explosive, toxic,
dangerous, or unstable gases/media.
• This system should only be operated and/or serviced by properly
trained individuals. NVE cannot be held responsible for damage
and/or injury caused by improper equipment use/service.
• Ensure all operating limitations are understood and followed in the
installation, operation, and maintenance of the entire system.
It is the installer’s and end user’s
responsibility to read and understand
the inclusions of this, ailiated manuals,
and related documentation before
operating the associated equipment.