NVE Challenger 43 Series User manual

National Vacuum Equipment
National Vacuum Equipment
National Vacuum Equipment
800-253-5500 natvac.com
Owner’s Manual
43 Series Challenger Tri-Lobe Blower
MADE IN THE USA

2| 4307 & 4310 Blower natvac.com | 800.253.5500
© 2019 National Vacuum Equipment, Inc.
Revision: 8 (Released) August, 2017
No part of this manual may be reproduced without the written permission of
National Vacuum Equipment, Inc.
4307 & 4310 BLOWERS
Owner’s Record
Date of Purchase: _________________________
Purchased from: __________________________
Serial Number: ____________________________

4307 & 4310 Blower | 3natvac.com | 800.253.5500
CONTENTS
Introduction ........................................................................................... 5
About National Vacuum Equipment, Inc..............................................................5
Our History ...................................................................................................................5
Limited Warranty................................................................................. 6
Warranty.......................................................................................................................6
Warranty Procedures ................................................................................................7
4307 & 4310 Tri-Lobe Blowers.................................................... 8
General Blower Operation........................................................................................8
General Blower Construction ..................................................................................8
Blower Specications ...............................................................................................9
Location of Serial Number.......................................................................................9
Operating Environment.............................................................................................9
Operating Limits.........................................................................................................9
Performance (Reference Only)............................................................................ 10
Dimensions............................................................................................................... 11
Air Flow Control........................................................................................................ 11
Sound Level .............................................................................................................. 11
Limitations on Use .................................................................................................. 12
Storage ................................................................................................ 13
Unpacking Blower ................................................................................................... 13
Handling .................................................................................................................... 13
Preservation ............................................................................................................. 13
Installation.......................................................................................... 14
Rotation and Airow............................................................................................... 14
Diesel Engine Precautions.................................................................................... 14
Direct Coupler Installation & Alignment ........................................................... 14
Belt Drive ................................................................................................................... 15
Drive Shaft ................................................................................................................ 15
Hydraulic Drive......................................................................................................... 15
PTO Drive................................................................................................................... 16
Plumbing and Piping.............................................................................................. 16

4| 4307 & 4310 Blower natvac.com | 800.253.5500
Recommended Accessories...........................................................17
Exhaust Silencer........................................................................................................17
Ballast Silencer..........................................................................................................17
Inlet Filter.....................................................................................................................17
4-Way Valve and Hoses ...........................................................................................17
Pressure Relief Valve................................................................................................17
Vacuum Relief Valve.................................................................................................17
Check Valves ..............................................................................................................17
Primary Shutoff .........................................................................................................17
Secondary Shutoff/Moisture Trap ........................................................................17
Bag House...................................................................................................................17
Operation...............................................................................................19
Initial Start Up Preliminary Checks.......................................................................19
Starting the Blower...................................................................................................19
Operating ....................................................................................................................19
Stopping the Blower .................................................................................................19
Cold Weather Operation..........................................................................................20
Maintenance.........................................................................................21
Maintenance Schedule............................................................................................21
Oil Capacities and Recommendations................................................................22
Gear Casing Lube......................................................................................................23
Clean Out Procedure If Flooded ............................................................................23
Lubricant Schedule...................................................................................................23
Rebuilding...................................................................................................................23
Blower Housing Flush...............................................................................................24
Vacuum/Pressure Changover Valve .....................................................................24
Troubleshooting..................................................................................25
Parts Breakdown................................................................................29
4307 Parts Diagram ................................................................................................29
4310 Parts Diagram ................................................................................................30
4307 & 4310 Parts List.........................................................................................31
4307 & 4310 4-Way Intake Manifold Parts Diagram & Parts List..............33
Our History
INTRODUCTION

4307 & 4310 Blower | 5natvac.com | 800.253.5500
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 qualied 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 putting 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 after it started, the
Company secured the rights to exclusive distribution of the Battioni 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 componentry,
purchased and developed its own line of vacuum pumps, 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 staff, all of whom are
dedicated to quality.

6| 4307 & 4310 Blower natvac.com | 800.253.5500
LIMITED WARRANTY
Warranty
National Vacuum Equipment, Inc. guarantees that the product it provides
is free of manufacturer’s defects, including materials and workmanship.
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 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 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
express 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. Except to the extent expressly stated herein, manufacturer’s liability
for incidental and consequential damage is hereby excluded to the full
extent permitted by law.
8. Manufacturer’s liability as stated herein cannot be altered except in
writing signed by an ofcer of National Vacuum Equipment, Inc.
9. 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.

4307 & 4310 Blower | 7natvac.com | 800.253.5500
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
qualied 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.

8| 4307 & 4310 Blower natvac.com | 800.253.5500
4307 & 4310 TRI-LOBE BLOWERS
NVE 4307 & 4310
TRI-LOBE BLOWERS
General Blower Operation
The NVE BLOWERS are severe duty vacuum
pumps, designed to be used in liquid waste
pumping systems where extended operation
is desired. The blower incorporates a ballast
air cooling system to provide superior cooling,
allowing for extended operation.
The air enters the intake under vacuum or at
atmospheric pressure. As the rotors rotate,
a xed volume of air is moved along the wall
of the cylinder towards the exhaust where
the pressure and temperature of the volume
of air increases. If the intake air is below
atmospheric pressure, cooling air will be drawn
in when the rotor tip passes the ballast port. The airow capacity of the machine
(in ACFM) is nearly proportional to the speed of the machine and is nearly
constant with changes in inlet or outlet pressures.
General Blower Construction
BALLAST INJECTION
BALLAST INJECTION
INTAKE
EXHAUST
BLOWER HOUSING
DRIVE ENDPLATE
NON-DRIVE ENDPLATE
DRIVE OIL
TANK
DRIVE ROTOR
IDLER ROTOR
DRIVE BEARINGS NON-DRIVE BEARINGS
OIL SLINGER
OIL SLINGER
TIMING GEARS
SEAL SLEEVE
SEAL RINGS
SEAL VENT

4307 & 4310 Blower | 9natvac.com | 800.253.5500
Sereial Number
Location of Serial Number
Each blower should have a brass
colored tag with an embossed
serial number. In addition, the
serial number and blower direction
as assembled at the factory are
stamped into the top of the hous-
ing as shown:
Specifications
Operating Environment
The 4307 and 4310 blowers are designed to move atmospheric air. Do not use to
move explosive or corrosive gasses or operate the blower in an area with explosive
gases. Any materials in the intake air must be ltered and separated from the air by
means of an intake lter, moisture trap and/or a cyclonic lter.
The ballast inlet must be positioned and protected from ingesting debris, uid or
explosive gases.
Operating Limits
The blower must be operated within all limits at all times. This typically means the
blower performance is limited by the exhaust temperature and temperature rise over
ambient for the blower.
*Exhaust temp and temp rise limited, †Pressure rise is from inlet to outlet, ‡Temperature rise is exhaust
minus ambient temperature surrounding blower (note if enclosed)
Size
RPM Inlet Vac
Pressure
Rise+
(psig)
Exhaust
Pressure
(psig)
Inlet
Temp
(ºF)
Exhaust
Temp
(ºF)
Temp
Rise≠ Ballast
Inlet Temp
(ºF)
Max Min Max Max Max Max Max
4307 4000 2500 FULL VAC 14 10 * 380 235 *
4310 4500 2500 FULL VAC 14 10 * 380 260 *

10 | 4307 & 4310 Blower natvac.com | 800.253.5500
Vacuum (Inches of Mercury)
RPM 018 24 27 10
2400 HP 218 24 - 25
CFM 500
4000 HP 4 36 47 52 40
CFM 826
4500 HP 5 40 52 58 45
CFM 931
Performance (Reference Only)
Vacuum (Inches of Mercury) Pressure (PSI)
RPM 0 9 15 18 21 24 27 510
2000 HP 2.0 8 11 13 15 17 - 8 15
CFM 280
2500 HP 2.5 10 14 16 19 21 -10 18
CFM 349
3000 HP 311 17 20 22 25 28 12 22
CFM 419
3500 HP 3.5 13 20 23 26 29 32 15 25
CFM 489
4000 HP 4.0 15 22 26 30 33 37 17 29
CFM 559
4307
The maximum allowable operating vacuum will vary depending on
R.P.M., ambient temperature, altitude and time running. The basic
principle to keep in mind is - faster R.P.M., higher air temperature
and longer run time all equal more heat in blower. When installing an
NVE 4307 or 4310 blower we recommend a normal R.P.M. of 4000.
Other speeds are ok as long as exhaust gas temperatures read on
the supplied thermometer do not exceed 380 degrees F. Maximum of
4500 R.P.M is for intermittent use only.
4310
Weights and measurements are for reference only.

4307 & 4310 Blower | 11natvac.com | 800.253.5500
Dimensions
Air Flow Control
The airow rate on the blower can be adjusted by changing the speed of the blower.
This can be accomplished by changing the PTO ratio, gearbox ratio, belt drive pulley
diameters or engine speed.
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 RPM’s and operate
the blower at speeds above or below the resonance speeds to reduce excess noise.
The noise level of the blower may 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 results.
131-4310-LDB
CW ROTATION
SCALE 1 / 4
131-4310-LSB
CCW ROTATION
SCALE 1 / 4
DIMENSIONS SYMMETRICAL TO LDB BLOWER
DETAIL C
SCALE 1 / 2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
NVE National
Vacuum
Equipment, Inc.
2670 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°
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:
BOB
PART NO.SHEET
2 131-4310LDB AND LSB 2 of
1/4
SEE BOM
APPROX. WT.
CAD FILE LOCATION: P:\Data\CAD - Production\131-4310-LDB & LSB.idw
SHEET SIZE D
333 LBS
BLOWER, 4310 CW & CCW W/ BALLAST
C
.13 .40
.250
STAMP DIRECTION
AND SERIAL NUMBER
INTO HOUSING AS
SHOWN
(6.710)
(1.499)
(.375)
SQ KEY
(1.657)
(.157)
(2.375)
(1.250)
(3.350)
(6.700)
(12.625) (9.805)
1/2-13 UNC - 2B .750
(17.701) (7.326)
(7.693)
(9.875)
(17.690)
(15.813)
(6.000) (6.313)
1/2-13 UNC - 2B .875
(8.500)
(8.875)
OIL FILL PORT
DRIVE END
9/16" HEX
OIL FILL PORT
NON-DRIVE END
9/16" HEX
OIL DRAIN PORT
DRIVE END
9/16" HEX
OIL DRAIN PORT
NON-DRIVE END
9/16" HEX
(5.920) BC
1/2-13 UNC - 1B 1.250
(4.000)
PILOT
(13.943)
REVISION HISTORY
REV DATE DESCRIPTION APPROVED ZONE
F10/22/2010
CHD'D FRONT OIL TANK, BRNG
RETAINER TO 1/4" FASTENER,
CORRECTED NOTE 6 (262 WAS
620)
ECN 1120 B4
G11/10/2010
P/N LDB AND LSB WAS LD AND
LS, ADDED CAST ALUM
BALLAST MANIFOLDS AND
SEALING WASHERS,
LENGTHENED BALLAST BOLTS
1/4", CHG'D HOSE CLAMPS.
ECN 1186 A1
(6.915)

12 | 4307 & 4310 Blower natvac.com | 800.253.5500
Limitations of Use
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 danger-
ous gases
Fire and/or explosion can
result
Pollution of the environment
Health risks to operators
Liquid drawn into blower
intake
Blower seizure, damage to
blower and ejection of parts
Install a moisture trap
or cyclonic separator on
the intake nozzle of the
blower.
Operation with the exhaust
or ballast blocked off.
Overheating Remove the blockage and
minimize restriction in the
exhaust or ballast circuits
Rotating blower in wrong
direction
Damage to blower Change the direction of
rotation of the drive or
order correct rotation of
blower.
Operating in excess of
recommended speed
Seizure of blower, damage to
blower and ejection of parts Operate the blower within
recommended speed
range
Operating blower below
minimum speed
Seizure of blower, damage to
blower and ejection of parts
Exceeding the maximum
pressure rise from blower
inlet to outlet
Overheat of Blower
Fire
Seizure of blower, damage to
blower and ejection of parts
Check inlet and exhaust
restrictions and reduce as
necessary.
Operating at excessively
hot inlet or ballast
temperatures
Overheating
Fire
Seizure of Blower, damage to
blower and ejection of parts
Monitor the inlet
temperature and make
corrections to the system
to bring temperature
within limits.
Operating at excessively
cold inlet temperatures.
Seizure of Blower, damage to
blower and ejection of parts
Review precautions in cold
weather conditions. Use
recommended lubrication.
Operating above the
exhaust temperature upper
limit
Overheating
Fire
Seizure of Blower, damage to
blower and ejection of parts
Reduce the vacuum level
in high ambient conditions.
Reduce the blower speed.
Remove restrictions in
the intake and exhaust
circuits.
Operating in excess of the
specied temperature rise
across the blower
Seizure of Blower, damage to
blower and ejection of parts
Reduce the vacuum or
pressure level to bring
within limits.

4307 & 4310 Blower | 13natvac.com | 800.253.5500
STORAGE
Unpacking Blower
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, rst le a claim with
the carrier and then contact NVE for
assistance.
Keep all intake, exhaust and ballast ports
covered to prevent accidental ingestion of
materials into the blower.
Handling
Use an appropriately sized lift strap for lifting the blower. Thread two 1/2-13 UNC
x 4” LG grade 8 bolts into the ange holes as shown.
Preservation
Keep all intake, exhaust and ballast port coverings in place to prevent debris or
liquids from entering blower. Reapply rust preventative oil to all metal parts,
including the compression chamber every 6 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 absence of rust.
• Use a rust preventative oil with a ash point over 400°F
• Dispose of used rust preventative oil according to local regulations
Model Weight (lbs)
4310 4310-LD 349
4310-LDB 360
4310-LDM 456
4307 4307-LD 321
4307-LDM 421

14 | 4307 & 4310 Blower natvac.com | 800.253.5500
131-4310-LDB
CW ROTATION
SCALE 1 / 4
131-4310-LSB
CCW ROTATION
SCALE 1 / 4
DIMENSIONS SYMMETRICAL TO LDB BLOWER
DETAIL C
SCALE 1 / 2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
NVE National
Vacuum
Equipment, Inc.
2670 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°
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:
BOB
PART NO.SHEET
2 131-4310LDB AND LSB 2 of
1/4
SEE BOM
APPROX. WT.
CAD FILE LOCATION: P:\Data\CAD - Production\131-4310-LDB & LSB.idw
SHEET SIZE D
333 LBS
BLOWER, 4310 CW & CCW W/ BALLAST
C
.13 .40
.250
STAMP DIRECTION
AND SERIAL NUMBER
INTO HOUSING AS
SHOWN
(6.710)
(1.499)
(.375)
SQ KEY
(1.657)
(.157)
(2.375)
(1.250)
(3.350)
(6.700)
(12.625) (9.805)
1/2-13 UNC - 2B .750
(17.701) (7.326)
(7.693)
(9.875)
(17.690)
(15.813)
(6.000) (6.313)
1/2-13 UNC - 2B .875
(8.500)
(8.875)
OIL FILL PORT
DRIVE END
9/16" HEX
OIL FILL PORT
NON-DRIVE END
9/16" HEX
OIL DRAIN PORT
DRIVE END
9/16" HEX
OIL DRAIN PORT
NON-DRIVE END
9/16" HEX
(5.920) BC
1/2-13 UNC - 1B 1.250
(4.000)
PILOT
(13.943)
REVISION HISTORY
REV DATE DESCRIPTION APPROVED ZONE
F10/22/2010
CHD'D FRONT OIL TANK, BRNG
RETAINER TO 1/4" FASTENER,
CORRECTED NOTE 6 (262 WAS
620)
ECN 1120 B4
G11/10/2010
P/N LDB AND LSB WAS LD AND
LS, ADDED CAST ALUM
BALLAST MANIFOLDS AND
SEALING WASHERS,
LENGTHENED BALLAST BOLTS
1/4", CHG'D HOSE CLAMPS.
ECN 1186 A1
(6.915)
INSTALLATION
Rotation and Airflow
Diesel Engine Precautions
• Do not operate blower with a diesel engine running at low RPMs
as torque pulses can cause rotor lobe contact and damage to the
blower.
When directly driving the blower with Diesel engine, bring the engine up to
operating RPM and then engage the blower via the clutch. Be sure to start the
blower under no load conditions.
Use caution when using a Diesel engine that is signicantly oversized for the
operating point of the blower. Doing so can result in an inertial mismatch, excess
torsional vibrations at low RPM’s and blower lobe contact.
Direct Coupler Installation and Alignment
Slide the couplers onto the blower shaft and prime mover shaft using appropriate
tools.
• Do not use a hammer to slide the couplers onto the shaft as this
may result in blower damage.
• Failure to properly align the couplers can cause premature wear
of the blower bearings and coupler sleeve.
• Couplers must be guarded to prevent entanglement.
CW Blower CCW Blower
131-4310-LDB
CW ROTATION
SCALE 1 / 4
131-4310-LSB
CCW ROTATION
SCALE 1 / 4
DIMENSIONS SYMMETRICAL TO LDB BLOWER
DETAIL C
SCALE 1 / 2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
NVE National
Vacuum
Equipment, Inc.
2670 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°
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:
BOB
PART NO.SHEET
2 131-4310LDB AND LSB 2 of
1/4
SEE BOM
APPROX. WT.
CAD FILE LOCATION: P:\Data\CAD - Production\131-4310-LDB & LSB.idw
SHEET SIZE D
333 LBS
BLOWER, 4310 CW & CCW W/ BALLAST
C
.13 .40
.250
STAMP DIRECTION
AND SERIAL NUMBER
INTO HOUSING AS
SHOWN
(6.710)
(1.499)
(.375)
SQ KEY
(1.657)
(.157)
(2.375)
(1.250)
(3.350)
(6.700)
(12.625) (9.805)
1/2-13 UNC - 2B .750
(17.701) (7.326)
(7.693)
(9.875)
(17.690)
(15.813)
(6.000) (6.313)
1/2-13 UNC - 2B .875
(8.500)
(8.875)
OIL FILL PORT
DRIVE END
9/16" HEX
OIL FILL PORT
NON-DRIVE END
9/16" HEX
OIL DRAIN PORT
DRIVE END
9/16" HEX
OIL DRAIN PORT
NON-DRIVE END
9/16" HEX
(5.920) BC
1/2-13 UNC - 1B 1.250
(4.000)
PILOT
(13.943)
REVISION HISTORY
REV DATE DESCRIPTION APPROVED ZONE
F10/22/2010
CHD'D FRONT OIL TANK, BRNG
RETAINER TO 1/4" FASTENER,
CORRECTED NOTE 6 (262 WAS
620)
ECN 1120 B4
G11/10/2010
P/N LDB AND LSB WAS LD AND
LS, ADDED CAST ALUM
BALLAST MANIFOLDS AND
SEALING WASHERS,
LENGTHENED BALLAST BOLTS
1/4", CHG'D HOSE CLAMPS.
ECN 1186 A1
(6.915)

4307 & 4310 Blower | 15natvac.com | 800.253.5500
Belt Drive
All NVE blower input shafts are equipped with an outboard roller bearing which
allows the use of V-belt.
The driving pulley from the prime mover must be mounted on the intake side of
the blower to prevent unloading of the blower bearings.
Use a narrow hub sheave and insure that the inner hub face is not more than
1/4” from the face of the gearbox. Be sure to also use an adjustable belt
tensioning system to allow compensation for belt wear.
• Excessive or insufcient belt tension could damage the blower and
prime mover.
• Belts and pulleys must be guarded to prevent entanglement.
• Regularly check all bushing fasteners for proper torque. Especially
when new or after service.
Use matched sets of V-belts to insure uniform torque transmission. If a belt goes
out, replace the whole set.
Drive Shaft
U-Joint operating angles at each end of the shaft should always be at least 1°to
prevent yoke bearing failure, but do not exceed the manufacturers maximum
recommended angles for the operating RPM.
U-Joint operating angles on each end of a driveshaft should always be equal
within 1°of each other to cancel an angle vibration.
For more driveline installation detail, please see the Dana-Spicer Driveline Instal-
lation Document J3311-1-DSSP available free from http://www2.dana.com/pdf/
J3311-1-DSSP.pdf.
• Use a drive shaft loop to catch shaft in the event of failure.
• It is suggested that overload protection be used on the blower
driveline.
Hydraulic Drive
The blower can be driven with an appropriately sized hydraulic system utilizing
a hydraulic motor with an SAE B or C, 4-bolt or 2-bolt ange by purchasing a
hydraulic mount (purchased separately) and appropriate couplers.
INSTALLATION
Rotation and Airflow
Diesel Engine Precautions
• Do not operate blower with a diesel engine running at low RPMs
as torque pulses can cause rotor lobe contact and damage to the
blower.
When directly driving the blower with Diesel engine, bring the engine up to
operating RPM and then engage the blower via the clutch. Be sure to start the
blower under no load conditions.
Use caution when using a Diesel engine that is signicantly oversized for the
operating point of the blower. Doing so can result in an inertial mismatch, excess
torsional vibrations at low RPM’s and blower lobe contact.
Direct Coupler Installation and Alignment
Slide the couplers onto the blower shaft and prime mover shaft using appropriate
tools.
• Do not use a hammer to slide the couplers onto the shaft as this
may result in blower damage.
• Failure to properly align the couplers can cause premature wear
of the blower bearings and coupler sleeve.
• Couplers must be guarded to prevent entanglement.

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PTO Drive
PTO’s must be properly sized to drive the blower. For more information on driving
blowers with PTO’s, please see the Chelsea Blower Torque Guide Bulletin HY25-
0075-B1-US available at www.parker.com .
• Improper use of “Hot Shift” (i.e. clutch type, constant mesh) PTO’s
can result in severe damage to the blower driveline and blower.
Take extra precautions to operate PTO’s within the manufacturer’s
recommendations
Plumbing and Piping
Do not hang plumbing from blower anges. Use isolating anges or isolating
hose to couple blower to piping to prevent dead weight from hanging off blower
and to allow for thermal expansion. Failure to do so may result in rotor contact
with housing. Use only clean piping insuring it is free of dirt, scale, cuttings, weld
spatter, and foreign materials of any kind.
The intake and exhaust system can be plumbed with 4” or 6” hose. Four inch
hose will provide a more compact system while the 6” hose will maximize the
efciency of the system.
The ballast system should be plumbed using 4” hose minimum. Be sure to
locate the ballast inlet away from heat, debris and uid sources as exposure to
these may result in damage to the blower.

4307 & 4310 Blower | 17natvac.com | 800.253.5500
RECOMMENDED ACCESSORIES
Exhaust and Ballast Silencer
Posive displacement blowers are inherently noisy due to their design. NVE oers
compable silencers for the exhaust to reduce decibel levels in the operang
environment. If using a non-OEM silencer, it should be tested for eecveness by
blanking o the inlet and monitoring exhaust gas temperature with the blower
running for at least one hour. The blower should not exceed specied exhaust gas
temperatures.
Tunable Ballast Silencer (4310 Blower)
A tunable ballast silencer provides for eld tuning of the ballast circuit to
minimize the noise for customer specic operating points. If using a non-OEM
silencer, it should be tested for effectiveness in the same fashion as described
above for exhaust silencers.
Inlet Filter
The intake lters are designed to ensure maximum airow efciency why
keeping out unwanted debris. The lters supplied by NVE use a stainless steel
screen and can be cleaned.
Four Way Valve and Hoses
If it is intended to operate the blower in the pressure mode, a four way valve
will be required. The 4-way valve size should match the hose size used in the
application.
Check Valves
For vacuum only setups, the blower system will need to have an appropriately
sized check valve on the inlet side of the blower. If the blower is to be operated
in a pressure mode, a check valve will need to be used on both the ballast air
system and the intake side of the blower. Note that the ballast circuit normally
draws air into the blower. Use the same size check valve as the hose used to
plumb the system.
Primary Shutoff
A primary shutoff is to be used with the blower as a rst line of defense to
prevent liquid from entering the blower. It is critical that an appropriately sized
primary shut off is used. Contact NVE for assistance with selecting the shutoff.
Secondary Shutoff/Moisture Trap
The secondary shutoff or moisture trap should also be appropriately sized for the
air ow application. Contact NVE for assistance with selecting the shutoff.
Bag House
Bag houses are typically used in systems where dry material is being pumped.
Specication of a proper bag house depends on the frequency and type of dry
material being pumped. Consult the factory for assistance in selecting a bag
house.
Exhaust and Ballast Silencer
Positive displacement blowers are inherently noisy due to their design. NVE
offers compatible silencers for the exhaust to reduce decibel levels in the
operating environment. If using a non-OEM silencer, it should be tested for
effectiveness by blanking off the inlet and monitoring exhaust gas temperature
with the blower running for at least one hour. The blower should not exceed
specied exhaust gas temperatures.
Inlet Filter
The intake lters are designed to ensure maximum airow efciency why
keeping out unwanted debris. The lters supplied by NVE use a stainless steel
screen and can be cleaned.
Four Way Valve and Hoses
If it is intended to operate the blower in the pressure mode, a four way valve
will be required. The 4-way valve size should match the hose size used in the
application.
Check Valves
For vacuum only setups, the blower system will need to have an appropriately
sized check valve on the inlet side of the blower. If the blower is to be operated
in a pressure mode, a check valve will need to be used on both the ballast air
system and the intake side of the blower. Note that the ballast circuit normally
draws air into the blower. Use the same size check valve as the hose used to
plumb the system.
Primary Shutoff
A primary shutoff is to be used with the blower as a rst line of defense to
prevent liquid from entering the blower. It is critical that an appropriately sized
primary shut off is used. Contact NVE for assistance with selecting the shutoff.
Secondary Shutoff/Moisture Trap
The secondary shutoff or moisture trap should also be appropriately sized for the
air ow application. Contact NVE for assistance with selecting the shutoff.
Bag House
Bag houses are typically used in systems where dry material is being pumped.
Specication of a proper bag house depends on the frequency and type of dry
material being pumped. Consult the factory for assistance in selecting a bag
house.

18 | 4307 & 4310 Blower natvac.com | 800.253.5500
4-Way Plug Adjustment Procedure:
Use at initial installation or for adjustment use steps 6 to 10.
1. Remove all hardware from center thread
2. Install Brass washers and place handle into proper t position based on your
installation direction.
3. Install cup washer and adjusting nut and secure to at least nger tight.
4. Turn the adjusting nut a half to ¾ turn to pull the plug off seat position
5. Test valve movement: Valve should move freely
6. If valve does not move freely, review for other obstructions or tighten adjusting
nut by ¼ turn until free movement occurs.
7. Once free movement is established install jam nut until nger tight
8. Use two wrenches and tighten jam nut while holding adjustment nut steady
9. Test valve movement: Valve should move freely
10. Valve is now adjusted and ready for installation.
Note: Use narrow wrench to hold adjusting nut while tightening jam nut.
Dry Lubed Bronze
Thrust Washer
Adjusting Nut
Jam Nut
Four Way Valve
Pressure Relief Valve
If the blower is intended to be used in pressure mode then a pressure relief
valve is required. NVE recommends the use of Kunkle pressure relief valves as
they have been proven to work well and have sufcient ow capacity.
Picture 1. 1. Unscrew the lock nut “A”
2. Turn the spring-tightener “B”
Picture 2. Once obtained the desired pressure, screw down the lock nut “A”
Picture 3. Fix the setting, using the rings “C” Situated on the body and on the
spring tightener
Pressure Relief Valve
Setting Instructions
Pressure Relief Valve
• Ensure system is free of
vacuum/pressure.
• Pressure relief valves should only be adjusted and/or serviced
by trained individuls.

4307 & 4310 Blower | 19natvac.com | 800.253.5500
OPERATION
Initial Start Up Preliminary Checks
Before operating 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 the drive oil tank and
inspect the gear for absence of rust.
Verify the blower spins freely by hand.
Verify all connections between the plumbing system and the blower anges are
in place and tight.
Verify oil levels through sight eyes. If additional oil is required, see the
maintenance section for details.
Verify the blower is set-up to spin the correct direction, especially when using a
gearbox.
Verify all guards are in place.
• Insure personnel wear hearing protection as noise levels can
exceed 85 dB.
• Do not rotate the blower in the reverse direction.
Starting the blower
HOT Shift PTO’s - Do not engage “Hot Shift PTO’s” outside of manufacturers
specications as damage to the PTO, driveline or blower may occur. Slowly
ramp the blower up to speed to prevent shocking the system.
Increase the vacuum level slowly until the rated level is reached. During the rst
8 hours of operation, check that there are no vacuum leaks, oil leaks, vibrations
or strange noises.
Operating
Start the blower and check the appropriate parameters as listed in the mainte-
nance schedule under the Maintenance section.
Stopping the Blower
When stopping the blower, if possible, remove all vacuum and pressure from
the blower.

20 | 4307 & 4310 Blower natvac.com | 800.253.5500
Cold Weather Operation
During very cold weather conditions, always warm the blower before operating at
full rated vacuum or pressure. Damage to the blower can result from operating
for short intervals in very cold weather conditions.
If using a coupler with a rubber jaw or sleeve in shear during extremely cold
weather, take note that elastomeric materials become stiffer in cold weather.
This results in a reduction of the shear protection in the event of a lock up of the
blower because the jaw or sleeve can handle more torque before giving way.
If hydraulically driving the blower, allow the hydraulic uid to warm up before
operating the blower at full load. Use the correct viscosity of hydraulic oil for the
operating temperature as recommended by the manufacturer of your system.
Before starting blower, verify the shaft rotates freely by hand. Water can con-
dense and freeze in the blower cylinder without warning causing a stall condition
at start up.
Check the intake lter and air intake daily. If snow is present, check the air
intake more frequently.
DO NOT thin out the oil in the gear cases with any other uids such as Kerosene.
Use the recommended oil for the operating temperatures.
If temperatures are so cold that the blower cannot warm up, enclose the blower
allowing for sufcient clearance from parts to prevent contact with hot or moving
components.