NVE 4307 Series User manual

National Vacuum Equipment
Owner’s Manual
&
Operating Instructions
Models 4307 & 4310 Blower
MADE
IN USA
Visit our web site to download pump setup guides,
brochures and other technical information.

2| 4307 & 4310 Blower www.natvac.com | 800.253.5500
© 2011 National Vacuum Equipment, Inc.
October 2012 rev.
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 | 3www.natvac.com | 800.253.5500
Table of Contents
Introducon................................................................................................................. 5
About Naonal Vacuum Equipment, Inc............................................................... 5
Our History .............................................................................................................. 5
Limited Warranty ........................................................................................................ 6
Warranty.................................................................................................................. 6
Warranty Procedures.............................................................................................. 7
Overview...................................................................................................................... 8
General Blower Operaon ..................................................................................... 8
General Blower Construcon................................................................................. 8
Locaon of Serial Number ..................................................................................... 9
Specicaons............................................................................................................... 9
Operang Environment.......................................................................................... 9
Operang Limits...................................................................................................... 9
Performance (Reference Only) ............................................................................10
Dimensions............................................................................................................11
Air Flow Control ....................................................................................................11
Noise Level ............................................................................................................11
Limitaons on Use ................................................................................................12
Storage .......................................................................................................................13
Unpacking Blower.................................................................................................13
Handling ................................................................................................................13
Preservaon .......................................................................................................... 13
Installaon ................................................................................................................. 14
Rotaon and Airow ............................................................................................14
Diesel Engine Precauons.................................................................................... 14
Direct Coupling...................................................................................................... 15
Recommended Equipment............................................................................. 15
Installaon and Alignment..............................................................................15
Belt Drive............................................................................................................... 16
Drive Sha ............................................................................................................ 17
Hydraulic Drive ..................................................................................................... 17

4| 4307 & 4310 Blower www.natvac.com | 800.253.5500
PTO Drive .............................................................................................................. 17
Plumbing and Piping............................................................................................18
Recommended Accessories ................................................................................18
Exhaust Silencer............................................................................................... 18
Tunable Ballast Silencer...................................................................................18
Inlet Filter .........................................................................................................18
Four Way Valve and Hoses..............................................................................19
Pressure Relief Valve........................................................................................19
Vacuum Relief Valve ........................................................................................19
Check Valves.....................................................................................................19
Primary Shuto................................................................................................19
Secondary Shuto/Moisture Trap ..................................................................20
Bag House ........................................................................................................20
Operaon................................................................................................................... 20
Inial Start Up ....................................................................................................... 20
Operang............................................................................................................... 21
Stopping the Blower .............................................................................................21
Cold Weather Operaon......................................................................................21
Maintenance .............................................................................................................22
MAINTENANCE SCHEDULE ..................................................................................22
Oil Capacies and Recommendaons ................................................................23
Rebuilding.............................................................................................................. 25
Cleanout Procedure If Flooded............................................................................25
4307 Parts Diagram ..............................................................................................26
4310 Parts Diagram ..............................................................................................27
4307 & 4310 Parts List ........................................................................................28
4307 4-Way Manifold Parts Diagram & Parts List...............................................30
4310 4-Way Manifold Parts Diagram & Parts List...............................................32
Troubleshoong ........................................................................................................34

4307 & 4310 Blower | 5www.natvac.com | 800.253.5500
Introduction
About National Vacuum Equipment, Inc.
Congratulaons! You now own a quality vacuum/pressure blower proudly manu-
factured in the U.S.A. by Naonal 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 quesons and provide you with the informaon necessary to keep your
equipment in peak working condion. Thank you for using Naonal Vacuum
Equipment. OUR MISSION: We are dedicated to the manufacture and wholesale
distribuon of quality vacuum system products at a reasonable price, on a mely
basis. We are a “one-stop shop” for manufacturers and distributors of vacuum
equipment.
Our History
Naonal 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 Com-
pany secured the rights to exclusive distribuon of the Baoni 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 fabricang its own line of com-
ponents, purchased and developed its own line of vacuum pumps, and began
purchasing for resale various valves and accessories. Today, NVE has full service
machine and fabricaon shops complete with CNC-controlled producon equip-
ment designed for close tolerance work. The company has a highly trained sta
all of whom are dedicated to quality.

6| 4307 & 4310 Blower www.natvac.com | 800.253.5500
Limited Warranty
Warranty
Naonal 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 condions:
1. A properly completed warranty registraon 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 consideraon 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 authenc 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 applicaon for which it was
intended. We do not recommend our product for parcular uses or
applicaons.
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’ op-
on, replacement of parts which are shown to have been defecve
when shipped.
6. Manufacturer’s liability shall not be enforceable for any product
unl Naonal 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 consequenal damage is hereby excluded to the
full extent permied by law.
8. Manufacturer’s liability as stated herein cannot be altered except in
wring signed by an ocer of Naonal Vacuum Equipment, Inc.
9. Certain products provided by Naonal Vacuum Equipment, Inc. are
covered by their respecve manufacturer’s warranes (e.g., engines
used in the NVE engine drive packages). These products are not
covered by the Naonal Vacuum Equipment, Inc. Manufacturer’s
Warranty.

4307 & 4310 Blower | 7www.natvac.com | 800.253.5500
Warranty Procedures
Should a potenal warranty situaon 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 authorizaon (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 inspecon 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 defecve upon our
inspecon, based upon prices at the me of purchase.

8| 4307 & 4310 Blower www.natvac.com | 800.253.5500
Overview
General Blower Operation
The NVE BLOWERS are severe duty vacuum
pumps, designed to be used in liquid waste
pumping systems where extended operaon
is desired. The pump incorporates a ballast
air cooling system to provide superior cooling,
allowing for extended operaon.
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 p passes the ballast port.
The airow capacity of the machine (in ACFM) is nearly proporonal 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 | 9www.natvac.com | 800.253.5500
Sereial Number
Location of Serial Number
Each blower should have a brass colored tag with an embossed serial number. In
addion, the serial number and blower direcon as assembled at the factory are
stamped into the top of the housing 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, mois-
ture trap and/or a cyclonic lter.
The ballast inlet must be posioned and protected from ingesng debris, uid or
explosive gases.
Operating Limits
The blower must be operated within all limits at all mes. 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)
InletVac
Pressure
Rise†
(psig)
Exhuast
Pressure
(psig)
Inlet
Temp
(°F)
Exhuast
Temp
(°F)
Temp.
Rise‡
(°F)
BallastInlet
Temp
(°F)
Max Min Max Max Max  Max Max 
4307 4000 900 FULLVAC 14 10 * 380 235 *
4310 4500 900 FULLVAC 14 10 * 380 260 *
RPM
Size

10 | 4307 & 4310 Blower www.natvac.com | 800.253.5500
Performance (Reference Only)
ACFM - Actual CFM generated on the vacuum or pressure side of the machine
B.O. - Blanked O
PRESSURE
PSI
0 9 15 18 21 24 27 10
HP 2.0 7.4 11.0 12.8 14.6 16.4  14.2
ACFM 280 171 114 77 26   143
HP 2.5 9.2 13.7 16.0 18.2 20.5  17.7
ACFM 349 241 184 147 96 17  213
HP 3.0 11.1 16.5 19.2 21.9 24.6 27.3 21.3
ACFM 419 311 254 217 166 87  283
HP 3.5 12.9 19.2 22.4 25.5 28.7 31.8 24.8
ACFM 489 381 324 286 236 157  353
HP 4.0 14.8 22.0 25.6 29.2 32.8 36.4 28.4
ACFM 559 451 394 356 306 227 57 423
PRESSURE
PSI
0 9 15 18 21 24 27 10
HP 2.0 9.9 15.2 17.8 20.4 23.1  19.9
ACFM 409 293 268 252 207 61  221
HP 2.5 12.4 19.0 22.2 25.5 28.8  24.8
ACFM 512 395 371 354 309 164  324
HP 3.0 14.8 22.7 26.7 30.6 346.0  29.8
ACFM 614 498 473 456 412 266  426
HP 3.5 17.3 26.5 31.1 35.7 40.3  34.8
ACFM 716 600 575 559 514 369  528
HP 4.0 19.8 30.3 35.6 40.8 46.1 51.4 39.7
ACFM 918 702 678 661 616 471 B.O. 631
HP 4.5 22.3 34.1 40.0 46.0 51.9 57.8 44.7
ACFM 921 805 780 763 719 573 129 733
VACUUMINCHESOFMERCURY
RPM
4307 VACUUMINCHESOFMERCURY
RPM
2000
2500
3000
4500
3500
4000
4310
2000
2500
3000
3500
4000

4307 & 4310 Blower | 11www.natvac.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 rao, gearbox rao, belt drive pulley
diameters or engine speed.
Noise Level
The noise level of the blower increases signicantly with higher levels of vacuum and
RPM. To minimize noise, operate the blower at the minimum speed and vacuum
level to achieve the desired performance results.
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.
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 www.natvac.com | 800.253.5500
Limitations on Use
Limitaon on Use Reason for Limitaon and/
or Risk
Correcve Acons
Operaon of the blower in an
explosive environment
Fire and/or explosion can
result
DO NOT USE
Using blower to move explo-
sive, toxic or dangerous gases
Fire and/or explosion can
result
Polluon of the environment
Health risks to operators
Liquid drawn into blower
intake
Blower seizure, damage to
blower and ejecon of parts
Install a moisture trap or
cyclonic separator on the
intake nozzle of the blower.
Operaon with the exhaust
or ballast blocked o.
Overheang Remove the blockage and
minimize restricon in the
exhaust or ballast circuits
Rotang blower in wrong
direcon
Damage to blower Change the direcon of ro-
taon of the drive or order
correct rotaon of blower.
Operang in excess of recom-
mended speed
Seizure of blower, damage to
blower and ejecon of parts Operate the blower within
recommended speed range
Operang blower below
minimum speed
Seizure of blower, damage to
blower and ejecon of parts
Exceeding the maximum
pressure rise from blower
inlet to outlet
Overheat of Blower
Fire
Seizure of blower, damage to
blower and ejecon of parts
Check inlet and exhaust
restricons and reduce as
necessary.
Operang at excessively hot
inlet or ballast temperatures
Overheang
Fire
Seizure of Blower, damage to
blower and ejecon of parts
Monitor the inlet tempera-
ture and make correcons
to the system to bring tem-
perature within limits.
Operang at excessively cold
inlet temperatures.
Seizure of Blower, damage to
blower and ejecon of parts
Review precauons in cold
weather condions. Use
recommended lubricaon.
Operang above the exhaust
temperature upper limit
Overheang
Fire
Seizure of Blower, damage to
blower and ejecon of parts
Reduce the vacuum level in
high ambient condions.
Reduce the blower speed.
Remove restricons in the
intake and exhaust circuits.
Operang in excess of the
specied temperature rise
across the blower
Seizure of Blower, damage to
blower and ejecon of parts
Reduce the vacuum or pres-
sure level to bring within
limits.

4307 & 4310 Blower | 13www.natvac.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 ingeson
of materials into the blower.
Handling
Use an appropriately sized li strap for liing 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 preventave oil to all metal parts,
including the compression chamber every 6 months or more frequently if the
relave humidity is greater than 80%.
While in storage, rotate the sha three to four revoluons every two weeks to
keep gears coated in oil.
Before installing a blower that has been stored for any length of me, remove
Model Weight(lbs)
4310LD 318
4310LDB 338
4310LDM 426
4307LD 270
4307LDB 308
4307LDM 412
4310
4307

14 | 4307 & 4310 Blower www.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)
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)
the intake and exhaust covers and inspect the rotors and cylinders to insure the
absence of rust. In addion, remove the oil ll plug on drive oil tank and inspect
the gear for absence of rust.
· Use a rust preventave oil with a ash point over 400°F
· Dispose of used rust preventave oil according to local regulaons
Installation
Rotation and Airow
Diesel Engine Precautions
· DO NOT OPERATE BLOWER WITH A DIESEL ENGINE RUNNING AT
LOW RPM’S 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 oper-
ang RPM and then engage the blower via the clutch. Be sure to start the blower
under no load condions.
Use cauon when using a Diesel engine that is signicantly oversized for the
operang point of the blower. Doing so can result in an ineral mismatch, excess
torsional vibraons at low RPM’s and blower lobe contact.
For more informaon Diesel torsional vibraons, see the technical report by Love-
Joy tled New Twists to Diesel Vibraon at www.lovejoy-inc.com .
CW Blower CCW Blower

4307 & 4310 Blower | 15www.natvac.com | 800.253.5500
Direct Coupling
Recommended Equipment
Use of a jaw in shear style coupler is recommended.
Installation and Alignment
Slide the couplers onto the blower sha and prime mover sha using appropriate
tools.
· DO NOT USE A HAMMER TO SLIDE THE COUPLERS ONTO THE SHAFT AS
THIS MAY RESULT IN BLOWER DAMAGE
TB Woods coupler - Check angular alignment with a micrometer or caliper.
Measure from the outside of one ange to the outside of the other at intervals
around the periphery of the coupling. Determine the maximum and minimum
dimensions without rotang the coupling. The dierence between the maximum
and minimum must not exceed the gure given under “Angular” in the table. If
a correcon is necessary, be sure to recheck the parallel alignment. Please see
www.tbwoods.com for more details.
the intake and exhaust covers and inspect the rotors and cylinders to insure the
absence of rust. In addion, remove the oil ll plug on drive oil tank and inspect
the gear for absence of rust.
· Use a rust preventave oil with a ash point over 400°F
· Dispose of used rust preventave oil according to local regulaons
Installation
Rotation and Airow
Diesel Engine Precautions
· DO NOT OPERATE BLOWER WITH A DIESEL ENGINE RUNNING AT
LOW RPM’S 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 oper-
ang RPM and then engage the blower via the clutch. Be sure to start the blower
under no load condions.
Use cauon when using a Diesel engine that is signicantly oversized for the
operang point of the blower. Doing so can result in an ineral mismatch, excess
torsional vibraons at low RPM’s and blower lobe contact.
For more informaon Diesel torsional vibraons, see the technical report by Love-
Joy tled New Twists to Diesel Vibraon at www.lovejoy-inc.com .
Description Manufacturer NVEP/N MFGP/N
BlowerFlange 424010150 10Sx11/2"BORE
SolidCoupler
Sleeve(EPDM)
424010JE 10JE
DriveFlange 424010<BORE> 10Sx<BORE>
BlowerJaw 424190150 L190x11/2"
Spider(NBR) 424190150S
DriveJaw 424190<BORE> L190x<BORE>
LoveJoy
TBWood's

16 | 4307 & 4310 Blower www.natvac.com | 800.253.5500
MAXIMUM RPM AND ALLOWABLE MISALIGNMENT (TB Woods)
(Dimensions in inches)
Size* Max RPM Parallel Angular Y (Approx.)
8 4500 .020 .094 2.938
9 3750 .025 .109 3.500
10 3600 .025 .128 4.063
*Shaded sizes are not recommended and are shown for reference only.
LoveJoy Coupler - Please see the LoveJoy website www.lovejoy-inc.com for details
on the alignment.
· Failure to properly align the couplers can cause premature wear
of the blower bearings and coupler sleeve.
· Couplers must be guarded to prevent entanglement.
Belt Drive
All NVE blower input shas are equipped with an outboard roller bearing which
allows the use of V-belt. We do not recommend the use of cogged, synchronous
or ming belts.
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 compensaon for belt wear.

4307 & 4310 Blower | 17www.natvac.com | 800.253.5500
· Excessive belt tension could damage the blower and prime mover.
· Belts and pulleys must be guarded to prevent entanglement.
Use matched sets of V-belts to insure uniform torque transmission. If a belt goes out,
replace the whole set.
Drive Shaft
U-Joint operang angles at each end of the sha should always be at least 1°to
prevent yoke bearing failure, but do not exceed the manufacturers maximum recom-
mended angles for the operang RPM.
U-Joint operang angles on each end of a drivesha should always be equal within 1°
of each other to cancel an angle vibraon.
For more driveline installaon detail, please see the Dana-Spicer Driveline Installaon
Document J3311-1-DSSP available free from hp://www2.dana.com/pdf/J3311-1-
DSSP.pdf.
· Use a drive sha loop to catch sha in the event of failure.
· It is suggested that overload protecon be used on the blower driveline.
Hydraulic Drive
The blower can be driven with an appropriately sized hydraulic system ulizing a hy-
draulic motor with an SAE B, 4-bolt or 2-bolt ange by purchasing a hydraulic mount
(purchased separately) and appropriate couplers.
PTO Drive
PTO’s must be properly sized to drive the blower. For more informaon on driving
blowers with PTO’s, please see the Chelsea Blower Torque Guide Bullen HY25-0075-
B1-US available at www.parker.com .
· Improper use of “Hot Shi” (i.e. clutch type, constant mesh) PTO’s can
result in severe damage to the blower driveline and blower. Take extra
precauons to operate PTO’s within the manufacturer’s recommendaons

18 | 4307 & 4310 Blower www.natvac.com | 800.253.5500
Plumbing and Piping
Do not hang plumbing from blower anges. Use isolang anges or isolang hose
to couple blower to piping to prevent dead weight from hanging o 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, cungs, weld spat-
ter, 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 e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.
Recommended Accessories
Exhaust Silencer
Posive displacement blowers are inherently noisy due to their design. NVE of-
fers 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
A tunable ballast silencer provides for eld tuning of the ballast circuit to minimize
the noise for customer specic operang points.
If using a non-OEM silencer, it should be tested for eecveness in the same fash-
ion as described above for exhaust silencers.
Inlet Filter
The intake lters are designed to ensure maximum airow eciency why keeping
out unwanted debris. The lters supplied by NVE use a stainless steel screen and
can be cleaned.

4307 & 4310 Blower | 19www.natvac.com | 800.253.5500
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 applica-
on.
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 sucient ow capacity. The valves we supply
are factory set to 10 PSI and are sealed. We do not recommend the blower to be
operated over 10 PSI nor do we recommend the use of imported relief valves.
Vacuum Relief Valve
Vacuum relief valves are not typically needed with NVE blowers. If the applicaon
indicates the use of a vacuum relief valve would be called for, we recommend you
thoroughly test your blower system to conrm the desired performance is reached
(i.e. tank protecon or overheat protecon). We would recommend the use of a
high quality vacuum relief valve such as Kunkle.
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 shuto is to be used with the blower as a rst line of defense to prevent
liquid from entering the blower. It is crical that an appropriately sized primary
shut o is used. Contact NVE for assistance with selecng the shuto.

20 | 4307 & 4310 Blower www.natvac.com | 800.253.5500
Secondary Shutoff/Moisture Trap
The secondary shuto or Moisture Trap should also be appropriately sized for the
air ow applicaon. Contact NVE for assistance with selecng the shuto.
Bag House
Bag houses are typically used in systems where dry material is being pumped. Spec-
icaon of a proper bag house depends on the frequency and type of dry material
being pumped. Consult the factory for assistance in selecng a bag house.
Operation
Initial Start Up
Preliminary Checks
Before operang a blower that has been stored for any length of me, remove the
intake and exhaust covers and inspect the rotors and cylinders to insure the absence
of rust. In addion, 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 connecons between the plumbing system and the blower anges are in
place and ght.
Verify oil levels through sight eyes. If addional oil is required, see the maintenance
secon for details.
Verify the blower is set-up to spin the correct direcon, especially when using a
gearbox.
Verify all guards are in place.