NVE Challenger Series User manual

Owner’s Manual
B500 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| B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
for reference only.
© 2021 National Vacuum Equipment, Inc.
Revision: 3 (Release) August 2020
No part of this manual may be reproduced without the wrien permission of
National Vacuum Equipment, Inc.
B500 Blower
Owner’s Record
Date of Purchase: _________________________
Purchased from: __________________________
Serial Number: ____________________________

B500 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
B500 Tri-Lobe Blower................................................................. 11
General Blower Operation..............................................................11
Specifications............................................................................12
Operating Environment................................................................. 12
Operating Limits ............................................................................. 12
Performance.................................................................................... 13
Airflow Control ................................................................................ 13
Sound Level .................................................................................... 13
Rotation and Airflow ...................................................................... 14
Handling ........................................................................................... 15
Preservation .................................................................................... 16
Limitations of Use........................................................................... 17
Installation Considerations.......................................................18
Belt Drive System........................................................................... 19
Gearbox Drive System................................................................... 19
Drive Sha System ....................................................................... 20
Diesel Engine Precautions............................................................ 21
Direct Coupler Installation & Alignment.................................... 22
Hydraulic Drive................................................................................ 21
Plumbing and Piping ..................................................................... 23
Recommended Accessories..................................................... 24
Exhaust Silencer............................................................................ 24

4| B500 Challenger Series www.natvac.com | 800.253.5500
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Intake Filter..................................................................................... 24
4-Way Valve..................................................................................... 25
Inlet Check Valve ........................................................................... 25
Primary Shuto.............................................................................. 25
Secondary Shuto/Moisture Trap.............................................. 25
Operation ...................................................................................26
Preliminary Check on Stored Units ............................................ 26
Initial Start Up ................................................................................ 26
Prior To Regular Start Up ..............................................................27
Operating The Blower ................................................................... 27
Stopping The Blower .................................................................... 28
Cold Weather Operating............................................................... 29
Maintenance ..............................................................................30
Before Beginning Maintenance .................................................. 30
Procedure for Removal of Pressure Retaining Device............ 30
Four-Way Valve Maintenance ....................................................... 31
Intake Filter Maintenance ............................................................ 32
Flushing The B500 Blower........................................................... 33
Changing Sump Gear Oil.............................................................. 35
Approximate Oil Capacities ......................................................... 35
Relief Valve General Considerations ...........................................37
Relief Valve Seing Instructions................................................. 38
Pressure Relief Valve .................................................................... 38
Pressure Relief Valve Adjustment Procedure........................... 38
Vacuum Relief Valve...................................................................... 39
Vacuum Relief Valve Adjustment Procedure ............................ 39
Generalized Maintenance and Inspection................................. 40
Maintenance Schedule................................................................. 42
Clean Out Procedure If Flooded ................................................. 43
Rebuilding ....................................................................................... 43
Maintenance Notes....................................................................... 44
Troubleshooting ........................................................................ 45
Blower Dimensions Diagram ........................................................47

B500 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.

6| B500 Challenger Series www.natvac.com | 800.253.5500
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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.

B500 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
procedures 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, operated, and maintained 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.
Damage caused by operation with improper drive system
specifications are not warrantable. NVE cannot assume any
responsibility for damage and/or injury resulting from improper
system operation.
CONDITION OF SALES
To view NVE’s Condition of Sales, scan the QR Code to
the right of this text with your phone’s camera or visit
hps://natvac.com/ordering-information/

8| B500 Challenger Series www.natvac.com | 800.253.5500
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.

B500 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 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
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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.
• 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.
• 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 documentation before operating the
associated equipment.

B500 Challenger Series | 11www.natvac.com | 800.253.5500 Weights and measurements are
for reference only.
B500 TRI-LOBE BLOWER
NVE B500
TRI-LOBE BLOWER
General Blower Operation
NVE B500 positive displacement
blowers operate with two tri-lobe rotors
to reduce pulsation levels. These are
ballast ported machines, which limits
the continuous vacuum levels that can
be aained. These blowers operate on
the principal of the opening and closing
of “pockets” that trap air and convey
from the intake port to the exhaust
port. The opening of the lobes creates
a vacuum that pulls air into the intake
of the blower. The air is then trapped
between the rotor lobes and the
housing and conveyed to the exhaust
port where, by the lobes coming
together, forces the air out the exhaust
port. Timing gears control the positions of the two rotors relative
to each other and maintain precision clearances inside the
machine. This allows the unit to operate without lubrication inside
the pumping chamber. The airflow capacity of the machine (in
Actual Cubic Feet/Minute) is nearly proportional to the rotational
speed of the machine and is nearly indirectly proportional to the
pressure dierential across the machine.
Location of Serial Number
Each NVE B500 blower will have a
stainless-steel blower tag bolted
to the non-drive endplate of the
blower as shown in the figure to the
right. This serial number should be
referenced in any contact with NVE
regarding the unit. This will allow the
specifics of the unit in question to
be determined as well as all build
information.
NVE B500 TRI-LOBE BLOWERS
General Blower Operation
NVE B500 positive displacement blowers operate with two tri-lobe rotors to reduce
pulsation levels. These are ballast ported machines, which allows continuous operation at
high vacuum levels. These blowers operate on the principal of the opening and closing of
“pockets” that trap air and convey it from the intake port to the exhaust port. The opening
of the lobes creates a vacuum that pulls air into the intake of the blower. The air is then
trapped between the rotor lobes and the housing and conveyed to the exhaust port where,
by the lobes coming together, forces the air out the exhaust port. If, at the passing of the
ballast port, the intake air is below atmospheric pressure, cooling air is pulled through the
ballast manifold and injected into the blower. Timing gears control the positions of the two
rotors relative to each other and maintain precision clearances inside the machine. This
allows the unit to operate without lubrication inside the pumping chamber. The airflow
capacity of the machine (in Actual Cubic Feet/Minute) is nearly proportional to the
rotational speed of the machine and is nearly indirectly proportional to the pressure
differential across the machine.
Location of Serial Number
Each NVE B500 blower will have a stainless-steel blower tag bolted to the non-drive endplate of
the blower as shown in the figure to the right. This serial number should be referenced in any contact
with NVE regarding the unit. This will allow the specifics of the unit in question to be determined as well
as all build information.

12 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
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SPECIFICATIONS
Operating Environment
The NVE B500 blower is designed to move atmospheric air. Do NOT
use this blower to move explosive, toxic, or corrosive gases. Do NOT
operate the blower in an area with explosive gases. Contamination
in the intake air must be filtered and/or separated from the air by
means of an intake filter, moisture trap and/or a cyclonic filter. These
filtration and separating devices must be regularly maintained to
ensure proper operation of the blower. Excessive pressure drop
across these devices can cause overheating of this blower. The
blower package should be shielded from excessive sources of dust
and debris. A special emphasis should be placed on the atmospheric
outlet location of the system as this becomes the inlet of the blower
when running in pressure mode. The blower exterior should be kept
clean to promote maximum heat transfer to the surrounding air.
Operating Limits
The NVE B500 is a ballast ported machine. The ballast inlet of
the machine must be positioned and protected from ingesting
debris, fluid, or explosive gases. Ballast air is injected into the
blower when the pressure inside the blower at the ballast port is
below atmospheric pressure. Due to its ballast porting, the B500 is
considered a continuous duty machine at the rated RPMs. However,
several limiting considerations must be checked for. This blower
must be operated within all limits at all times. This typically means
the blower performance is limited by the exhaust
temperature and the temperature rise over
ambient temperature for the blower.
As a general rule, higher machine
input speeds, higher ambient air
temperatures, and longer operation
times will result in higher blower operation
temperatures. The system should be designed
to result in a continuous blower exhaust
temperature not exceeding 370°F or 280°F over
ambient temperature (whichever is lower). This
measurement should be made on the exhaust
side of the blower housing.
* RPMs up to 2600 are acceptable pending exhaust temperatures are tested and found to be within
specifications shown above. + This should only be used as a reference. The system must be calibrated so
that the blower exhaust temperature does not exceed the rating shown in the table above.
+ This is dependent on many factors and may cause actual inlet vacuum to vary from the value presented
above. Ultimate inlet vacuum is dependent on several factors but blower RPM will play the greatest role.
Higher relative RPM ranges will produce higher ultimate inlet vacuum levels.
Input Speed Exhaust Temperature ∆ Pressure Inlet Vacuum
2200-2400* 280ºF over ambient or 370ºF 15 PSI + ≈ 24” Hg (Corrected) +

B500 Challenger Series | 13www.natvac.com | 800.253.5500 Weights and measurements are
for reference only.
Performance (Reference Only)
Performance of your NVE B500 blower may deviate from the
aforementioned data for numerous reasons. These reasons
include things such as: ambient temperature, oil condition,
bearing condition, cleanliness of the media being pumped, etc.
Thus, the performance values presented above should only be
used for reference purposes. Actual operating conditions may
vary and it is the system designer’s responsibility to account for
these variations.
Depending on the specifics of a given application, it may be
required to break the ultimate vacuum of the B500 to keep it from
overheating. Always set up the vacuum system to keep blower
exhaust temperatures at or below 280°F over ambient or 370°F
(whichever is lower).
Airflow Control
The airflow rate of the blower can be adjusted by changing the
speed of the blower. This can be accomplished by changing the
PTO ratio, the gearbox ratio, pulley ratio (on belt drives), hydraulic
pump/motor displacement, or driving engine speed. The blower
input speed is nearly proportional to the airflow of the machine.
Sound Level
It is recommended the operator monitor the blower while running
and listen for resonances (increased levels of noise) that may
occur at certain RPMs and operate the blower at speeds above or
below the resonance speeds to reduce excess noise. Resonance
areas are dependent on many factors and tend to be application
specific.
The noise level of the blower will increase with higher levels of
vacuum and RPM. To minimize noise, operate the blower at the
minimum speed and vacuum level required to achieve the desired
performance.
Vacuum (Inches of Mercury) Pressure (PSI)
RPM 0 4 10 15 18 20 22 24 25 5 10 15
HP 3.7 4.9 9.2 13.8 16.2 17.7 19.7 N/A N/A 11.1 18.0 26.2
2000 TORQUE 10.3 13.5 25.4 36.2 42.6 46.5 50.7 N/A N/A 29.2 47.1 68.7
CFM 370
2200
HP 4.7 5.7 10.6 15.4 18.0 19.7 21.5 N/A N/A 12.0 19.7 28.8
TORQUE 11.2 13.7 25.3 36.8 43.1 47.1 51.3 N/A N/A 28.7 47.1 68.8
CFM 406
2400
HP 5.7 6.5 11.7 17.1 20.0 21.8 23.7 25.4 N/A 13.8 22.6 32.4
TORQUE 12.4 14.2 25.6 37.4 43.7 47.8 51.9 55.7 N/A 30.1 49.6 70.9
CFM 431
2600
HP 6.9 7.3 12.8 18.8 21.9 23.9 26.0 28.0 28.5 15.2 24.7 35.0
TORQUE 13.9 14.7 25.9 37.9 44.2 48.3 52.5 56.5 57.6 30.8 50.0 70.8
CFM 478
B500

14 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
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Rotation & Airflow
Either port can be used for intake and exhaust connection to the
blower. However, the handle position for vacuum and pressure
will vary accordingly. In the “vacuum” position, the four way valve
must be positioned to connect the intake port to the intake
connection (the tank). The following graphics portray this hookup
and airflow information as it relates to the B500 blower.
Rotation & Airflow
Either port can be used for intake and exhaust connection to the blower. However, the handle position
for vacuum and pressure will vary accordingly. In the “vacuum” position, the four way valve must be
positioned to connect the intake port to the intake connection (the tank). The following graphics portray
this hookup and airflow information as it relates to the B500 blower.
INTAKE PORT
EXHAUST PORT
INTAKE PORT
EXHAUST PORT
SHOWN IN VACUUM MODE
EXHAUST PORT
INTAKE PORT

B500 Challenger Series | 15www.natvac.com | 800.253.5500 Weights and measurements are
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Handling
When unpacking the blower or blower package from the skid,
verify the packing list matches the product supplied and that no
visible damage has occurred during shipping. In the event damage
has occurred, first file a claim with the carrier and then contact
NVE for assistance.
Keep all intake and exhaust ports covered to prevent accidental
ingestion of materials into the blower.
Use an appropriately sized li strap for the weight of the blower or
package being lied.
Do NOT use li points on the blower to pick up blower packages.
The blower was not designed to be used as a pick point for
packages. Damage to the blower and/or package will likely result.
The blower stand includes liing pockets and a cross member
that can assist in liing the package. It is the users’ responsibility
to ensure a safe liing procedure for any NVE package.
Handling
When unpacking the blower or blower package from the skid, verify the packing list matches the
product supplied and that no visible damage has occurred during shipping. In the event damage has
occurred, first file a claim with the carrier and then contact NVE for assistance.
Keep all intake and exhaust ports covered to prevent accidental ingestion of materials into the blower.
Use an appropriately sized lift strap for the weight of the blower or package being lifted.
Do NOT use lift points on the blower to pick up blower packages. The blower was not designed to be
used as a pick point for packages. Damage to the blower and/or package will likely result. The blower
stand includes lifting pockets and a cross member that can assist in lifting the package. It is the users’
responsibility to ensure a safe lifting procedure for any NVE package.
Improper handling of the blower can cause blower damage and/or dropping of the
blower. Ensure the load is balanced and safe before picking.
Improper handling of the blower
can cause blower damage and/or
dropping of the blower. Ensure the
load is balanced before picking.

16 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
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DESCRIPTION PART NUMBER DRY WEIGHT
Blower, B500, Low Sha, CCW, Manifold 131-B500-LSM 382 LBS
B500 Frame Mount Gearbox Drive, RH MT & Exhaust
Silencer Package
147-B500-001 774 LBS
B500 Frame Mount Gearbox Drive, Exhaust Silencer
Package
147-B500-002 701 LBS
B500 Frame Mount Gearbox Drive, LH MT & Exhaust
Silencer Package
147-B500-003 780 LBS
B500 Frame Mount Hydraulic Adapter, RH MT & Exhaust
Silencer Package
147-B500-004 735 LBS
B500 Frame Mount Hydraulic Adapter, Exhaust Silencer
Package
147-B500-005 664 LBS
B500 Frame Mount Hydraulic Adapter, LH MT & Exhaust
Silencer Package
147-B500-006 742 LBS
Table 1: B500 Blower & Packaging Dry Weights
Preservation
Keep all intake, ballast, and exhaust port coverings in place to prevent
debris or liquids from entering blower. Reapply rust preventative oil to all
metal parts, including the pumping chamber every six months or more
frequently if the relative humidity is greater than 80%.
While in storage, rotate the shaft three to four revolutions every two weeks
to keep gears coated in oil.
Before installing a blower that has been stored for any length of time,
remove the intake and exhaust covers and inspect the rotors and
cylinders to insure the absence of rust. In addition, remove the oil ll plug
on drive oil tank and inspect the gear for any evidence of rust.
The dry weights of the B500 and associated packages are given in
the table below:
Dispose of used rust preventative oil
according to local and EPA regulations in
an environmentally friendly manner.
Use a rust preventative oil with a ash
point over 400ºF. Drain oil prior to
putting unit in service.

B500 Challenger Series | 17www.natvac.com | 800.253.5500 Weights and measurements are
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LIMITATION OF USE REASON FOR LIMITATION AND/
OR RISK CORRECTIVE ACTIONS
Operation of the
blower in an explosive
environment.
Fire and/or explosion can result.
DO NOT USE
Using blower to move
explosive, toxic, or
dangerous gases.
Fire and/or explosion can result.
Pollution of the environment.
Health and injury risks to
operator(s).
Liquid drawn into
blower intake.
Blower seizure, damage to
blower, and possible ejection of
parts.
Install a moisture trap or
cyclonic separator before
the intake port of the blower.
If liquid is suspect in the
blower, remove before
starting blower.
Operation with the
ballast port blocked or
restricted.
Overheating of blower. Eventual
catastrophic failure of blower.
Potential Fire.
Remove any blockage and
eliminate any restriction in
the ballast system.
Operation with exhaust
port blocked o or
restricted.
Overheating & potentially
dangerous system pressure.
Remove blockage and
minimize restriction in the
exhaust circuit.
Rotation of the blower
in the wrong direction. Damage to the blower.
Change the direction of
rotation of the drive. (Jog
blower to confirm correct
rotation at first startup).
Operation of
blower in excess of
recommended speed.
Overheating & potential seizure
of blower. Blower damage &
ejection of parts possible. Operate the blower within the
recommended speed range.
Operation of blower
below minimum speed.
Potential seizure of blower.
Blower damage & ejection of
parts possible.
Operating at
excessively hot inlet &
atmospheric conditions.
Overheating of blower. Eventual
catastrophic failure of blower.
Monitor the blower operating
temperature & adjust intake
vacuum and/or RPM to get
operating temperatures
within specification. Keep
blower & intake filter clean.
Operation at
excessively hot ballast
air temperatures.
Overheating of blower. Eventual
catastrophic failure of blower.
Potential Fire.
Obtain the coolest air
possible for ballast intake.
Ensure hot exhaust air is not
being recirculated.
Operating at
excessively cold inlet &
atmospheric conditions.
Damage to, and potential seizure
of, the blower.
Ejection of parts possible.
Review precautions in cold
weather conditions. Use
recommended lubrication.
Operating above the
exhaust temperature
upper limit.
Overheating of blower.
Potential fire.
Damage to, and potential seizure
of, the blower.
Reduce intake vacuum level.
Reduce the blower speed.
Remove restrictions in intake
& exhaust circuits (inlet
filter!)
Operation of drive
with excessive
misalignment.
Damage to, and potential seizure
of, the blower.
Ejection of parts possible.
Remove misalignment &
replace wearing components
in drive system.
Limitations of Use

18 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
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INSTALLATION CONSIDERATIONS
Any B500 blower package should be bolted to the frame of the
truck in a suicient manner. Maintaining locations should include
stand corners on the stand should be flat against the frame rail
of the truck. Ensure there are no bolts or rivets between the
mounting surface. Truck manufacturers’ should be consulted for
proper mounting. NVE cannot take responsibility for the mounting
of any NVE product.
The exhaust discharge of the blower silencer should be
considered in the installation of the package. Remember, this
becomes the intake when the blower is operated in pressure
mode, so ensure hot and/or dirty air is not going to be pulled into
the silencer (and ultimately the blower).
Any ballast cooled blower will be sensitive to the condition
(cleanliness and temperature) of the ballast air. Ensure ballast
inlets are positioned to pull the coolest, cleanest air possible.
Avoid ballast inlet location where any hot exhaust air (from the
blower or truck/components) can be pulled into the blower’s
ballast system.
The moisture trap, if equipped, should be plumbed to the primary
*Read “Plumbing and Piping” (Page 22) section of this manual for
proper plumbing selection
Fill out the blower registration form and email to [email protected].
Fill out the installation check list & warranty validation form and
email to [email protected].
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A A
B B
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D D
NVE National
Vacuum
Equipment, Inc.
2707 Aero Park Drive, Traverse City, MI 49686
Phone: [phone] Fax: [phone]
TOLERANCES UNLESS OTHER WISE SPECIFIED
One place (.X) ±.1
Two places (.XX) ±.01
Three places (.XXX) ±.005
Angles ±1°
Fractional (X/X) ±1/16
All machined surfaces 125 RMS max.
Remove all burrs and sharp edges.
CAD drawing - NO manual changes.
All dimensions in inches unless specified.
This document may contain confidential trade
secret information which is the exclusive
property of National Vacuum Equipment. Any
information on this drawing is not to be
disclosed to anyone not having a "Need to
Know." The information contained herein is to
be used only in accordance with the best
interests of National Vacuum Equipment.
PART NAME:
MATERIAL:
DRAWN BY:
SCALE:
CHECKED BY:
DATE:
MSG MSG
3/31/2020
PART NO.SHEET
5 147-B500-001
1 of
SEE BOM
APPROX. WT.
CAD FILE LOCATION: I:\Engineering\CAD - Production\147-B500-001.idw
SHEET SIZE D
783 LBS
B500 FRAME MOUNT GEARBOX DRIVE, RH MT
& EXHAUST SILENCER PACKAGE
REVISION HISTORY
REV DATE DESCRIPTION ECN APPROVED ZONE
A2/4/2020 CREATED PRINT ECN 2515 MSG -
B3/12/2020 MODIFIED PACKAGING ECN 2515 MSG -
C7/8/2020 MODIFIED PACKAGING ECN 2515 MEM -
D9/2/2020 MODIFIED PACKAGING & SILENCERS ECN 2586 MSG -
28 15/16"
16 3/16"
6 3/16"
7 3/8"
4" TTMA FLANGE
19"
10 3/4" 22"
43"
25 3/8"
6 5/8"
5"
1 3/8"
5/16" KEY
13 3/8"
5 9/16"
5 3/4"
13 3/4"
CONNECTION TO PRIMARY
SHUTOFF

B500 Challenger Series | 19www.natvac.com | 800.253.5500 Weights and measurements are
for reference only.
Belt Drive System
The B500 blower is able to accommodate a V-Belt drive system.
It is recommended to mount the prime mover on the intake side
of the blower. This prevents unloading of the blower bearings
at low load levels and also helps reduce the moment load on
the bearings. The pulley should be mounted as close to the oil
sump cover of the blower as possible (with a minimum ¼” gap).
Some method of belt tension adjustment must be installed to
take up belt wear. Belts should be matched to insure uniform
torque transmission. Belts should be replaced in sets. Due to
the inherently higher hub loads generated, synchronous drive
systems should not be used on a B500 blower.
Belts and pulleys must be fully
guarded to prevent entanglement
and ejection of parts.
Excessive or insuicient belt tension could damage the blower
and/or prime mover.
Regularly check all bushing fasteners for proper torque,
especially aer initial run in or aer any belt drive service.
A belted drive specialist should be consulted for design review
of a belted drive system incorporating NVE components.
Gearbox Drive System
Many B500 blower packages supplied by NVE include a 1:2
(speed up) right angle gearbox. If using an NVE package with
this gearbox, remember that PTO output speed will need to be
1/2 of desired blower input speed. The gearbox incorporated
on the respective NVE B500 packages can be flipped 180º so
either input rotation can be accommodated. Double check that
the orientation of the gearbox will produce the correct blower
rotation. The “snout” of the gearbox will be the “high” rotation
speed.

20 | B500 Challenger Series www.natvac.com | 800.253.5500
Weights and measurements are
for reference only.
Drive Sha System
The drivesha system is a critical component in regards to
eective and safe operation of any system containing NVE
components. Failure to correctly specify a proper drivesha
system can cause system damage and potentially dangerous
situations. Furthermore, improper drivesha systems can
result in non-warrantable damage to NVE components. Thus, a
drive line specialist should be consulted to specify the proper
drivesha system for the blower application based on application
specific parameters. These parameters include the horsepower,
RPM, and length of the drivesha. U-joint operating angles at
each end of the sha must always be within manufacturers’
specifications to prevent yoke bearing failure and excessive
bearing stresses on the gearbox and blower. NEVER exceed the
manufacturers’ maximum recommended drivesha angles for the
specific application. Damage to the blower will occur.
U-joint operating angles on each end of a drivesha should
always be equal within manufacturers’ specifications of each
other to cancel angle induced vibration. The driveline specialist
will design this system from a torque transfer and geometric
approach to optimize the performance of the system. The drive
sha must also be balanced to manufacturers’ specification. This
is true for a replacement drivesha as well. Also, ensure the yokes
on both ends of the driveline are in phase.
Symptoms of drivesha system issues include, but are not
necessary limited to, the following:
Driveline vibration
Blower and/or gearbox vibration
Premature wear/failure of couplers (typ. elastomeric hub)
Excessive end play in universal joints
Loose, missing, or damaged fasteners on gearbox bracket
Loose, missing, or damaged fasteners on the blower
Loose, missing, or damaged driveline fasteners
Broken/missing driveline components