Item # 812, 4500 Series Model 812 Positive Displacement Blower with Vacuum Pump On Energy Machinery, Inc.

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Setting the Industry Standard

Gardner Denver™’s 4500 Series of rotary positive displacement lobe blowers and vacuum pumps are the result of more than seventy years experience in the design, manufacture and support of superior industrial equipment.

Unit of Measure

Vertical Configurations

Approximate Weight (Vertical)	N/A 1050 lb
A (Vertical)	N/A 18 3/4 in
B (Vertical)	N/A 8 in
C (Vertical)	N/A 6 in
D (Vertical)	N/A 15 in
E (Vertical)	N/A 12 1/2 in
F (Vertical)	N/A 16 1/2 in
G (Vertical)	N/A 20 1/2 in
H (Vertical)	N/A 29 1/8 in
J (Vertical)	N/A 22 in
J/2 (Vertical)	N/A 11 in
K (Vertical)	N/A 8 in
L (Vertical)	N/A 18 1/8 in
M (Vertical)	N/A 34 in
N (Vertical)	N/A 12 in
O (Vertical)	N/A 6 3/4 in
P (Vertical)	N/A 6 1/2 in
R (Vertical)	N/A 1/2 in
S (Vertical)	N/A 1 7/8 in
T (Vertical)	N/A 1 in
U (Vertical)	N/A 7/8 in
X (Vertical)	N/A 4 3/8 in
Y (Vertical)	N/A 3 1/4 in
Z (Vertical)	N/A 7/16 in

Horizontal Configurations

Approximate Weight (Horizontal)	N/A 1050 lb
A (Horizontal)	N/A 18 3/4 in
B (Horizontal)	N/A 8 in
C (Horizontal)	N/A 8 in
D (Horizontal)	N/A 21 1/2 in
E (Horizontal)	N/A 1 1/2 in
F (Horizontal)	N/A 12 1/2 in
G (Horizontal)	N/A 22 in
H (Horizontal)	N/A 23 1/2 in
J (Horizontal)	N/A 25 1/4 in
J/2 (Horizontal)	N/A 12 5/8 in
K (Horizontal)	N/A 8 in
L (Horizontal)	N/A 18 1/8 in
M (Horizontal)	N/A 34 in
N (Horizontal)	N/A 12 in
O (Horizontal)	N/A 6 3/4 in
P (Horizontal)	N/A 6 1/2 in
R (Horizontal)	N/A 1/2 in
S (Horizontal)	N/A 1 7/8 in
T (Horizontal)	N/A 1 in
U (Horizontal)	N/A 7/8 in
V (Horizontal)	N/A 4 in
X (Horizontal)	N/A 5 1/4 in
Y (Horizontal)	N/A 3 1/4 in
Z (Horizontal)	N/A 7/16 in

Specifications

Displacement	N/A 1.04 ft³/rev
Industry Standards/Certifications	N/A Compressed Air and Gas Institute (CAGI) Energy Star Partner ISO 9001:2008
Series	N/A 4500
Brands	N/A Gardner Denver™

Pressure Performance Data

Speed for Pressure Performance	N/A 1170 rpm1460 rpm1770 rpm1910 rpm2100 rpm
Airflow at 6 psi Pressure and 1170 rpm Speed	N/A 957 ft³/min33.2 bhp
Airflow at 6 psi Pressure and 1460 rpm Speed	N/A 1259 ft³/min42.4 bhp
Airflow at 6 psi Pressure and 1770 rpm Speed	N/A 1581 ft³/min52.9 bhp
Airflow at 6 psi Pressure and 1910 rpm Speed	N/A 1727 ft³/min57.9 bhp
Airflow at 6 psi Pressure and 2100 rpm Speed	N/A 1924 ft³/min65.0 bhp
Airflow at 8 psi Pressure and 1170 rpm Speed	N/A 917 ft³/min43.8 bhp
Airflow at 8 psi Pressure and 1460 rpm Speed	N/A 1218 ft³/min55.6 bhp
Airflow at 8 psi Pressure and 1770 rpm Speed	N/A 1541 ft³/min68.9 bhp
Airflow at 8 psi Pressure and 1910 rpm Speed	N/A 1686 ft³/min75.2 bhp
Airflow at 8 psi Pressure and 2100 rpm Speed	N/A 1884 ft³/min84.1 bhp
Airflow at 10 psi Pressure and 1170 rpm Speed	N/A 882 ft³/min54.4 bhp
Airflow at 10 psi Pressure and 1460 rpm Speed	N/A 1183 ft³/min68.9 bhp
Airflow at 10 psi Pressure and 1770 rpm Speed	N/A 1505 ft³/min85.0 bhp
Airflow at 10 psi Pressure and 1910 rpm Speed	N/A 1651 ft³/min
Airflow at 10 psi Pressure and 2100 rpm Speed	N/A 1849 ft³/min103.1 bhp
Airflow at 12 psi Pressure and 1170 rpm Speed	N/A 850 ft³/min65.0 bhp
Airflow at 12 psi Pressure and 1460 rpm Speed	N/A 1151 ft³/min82.1 bhp
Airflow at 12 psi Pressure and 1770 rpm Speed	N/A 1473 ft³/min101.0 bhp
Airflow at 12 psi Pressure and 1910 rpm Speed	N/A 1619 ft³/min109.9 bhp
Airflow at 12 psi Pressure and 2100 rpm Speed	N/A 1817 ft³/min122.2 bhp
Airflow at 15 psi Pressure and 1170 rpm Speed	N/A 806 ft³/min80.9 bhp
Airflow at 15 psi Pressure and 1460 rpm Speed	N/A 1107 ft³/min102.0 bhp
Airflow at 15 psi Pressure and 1770 rpm Speed	N/A 1430 ft³/min125.1 bhp
Airflow at 15 psi Pressure and 1910 rpm Speed	N/A 1575 ft³/min135.9 bhp
Airflow at 15 psi Pressure and 2100 rpm Speed	N/A 1773 ft³/min150.7 bhp

Vacuum Performance Data

Speed for Vacuum Performance	N/A 1170 rpm1460 rpm1770 rpm1910 rpm2100 rpm
Airflow at 8 inHg Vacuum and 1170 rpm Speed	N/A 971 ft³/min21.8 bhp
Airflow at 8 inHg Vacuum and 1460 rpm Speed	N/A 1273 ft³/min28.0 bhp
Airflow at 8 inHg Vacuum and 1770 rpm Speed	N/A 1595 ft³/min35.0 bhp
Airflow at 8 inHg Vacuum and 1910 rpm Speed	N/A 1741 ft³/min38.4 bhp
Airflow at 8 inHg Vacuum and 2100 rpm Speed	N/A 1938 ft³/min43.2 bhp
Airflow at 10 inHg Vacuum and 1170 rpm Speed	N/A 929 ft³/min27.0 bhp
Airflow at 10 inHg Vacuum and 1460 rpm Speed	N/A 1230 ft³/min34.3 bhp
Airflow at 10 inHg Vacuum and 1770 rpm Speed	N/A 1553 ft³/min42.6 bhp
Airflow at 10 inHg Vacuum and 1910 rpm Speed	N/A 1698 ft³/min46.5 bhp
Airflow at 10 inHg Vacuum and 2100 rpm Speed	N/A 1896 ft³/min52.0 bhp
Airflow at 12 inHg Vacuum and 1170 rpm Speed	N/A 884 ft³/min32.1 bhp
Airflow at 12 inHg Vacuum and 1460 rpm Speed	N/A 1185 ft³/min40.6 bhp
Airflow at 12 inHg Vacuum and 1770 rpm Speed	N/A 1508 ft³/min50.1 bhp
Airflow at 12 inHg Vacuum and 1910 rpm Speed	N/A 1654 ft³/min54.6 bhp
Airflow at 12 inHg Vacuum and 2100 rpm Speed	N/A 1851 ft³/min60.9 bhp
Airflow at 15 inHg Vacuum and 1170 rpm Speed	N/A 809 ft³/min39.8 bhp
Airflow at 15 inHg Vacuum and 1460 rpm Speed	N/A 1111 ft³/min50.1 bhp
Airflow at 15 inHg Vacuum and 1770 rpm Speed	N/A 1433 ft³/min61.5 bhp
Airflow at 15 inHg Vacuum and 1910 rpm Speed	N/A 1579 ft³/min66.8 bhp
Airflow at 15 inHg Vacuum and 2100 rpm Speed	N/A 1776 ft³/min74.1 bhp
Airflow at 16 inHg Vacuum and 1460 rpm Speed	N/A 1082 ft³/min53.3 bhp
Airflow at 16 inHg Vacuum and 1770 rpm Speed	N/A 1405 ft³/min65.3 bhp
Airflow at 16 inHg Vacuum and 1910 rpm Speed	N/A 1550 ft³/min70.8 bhp
Airflow at 16 inHg Vacuum and 2100 rpm Speed	N/A 1748 ft³/min78.5 bhp

4500 Series Performance Range Delivers

Pressure	N/A Up to 15 psig
Vacuum	N/A Up to ≥ 16 Hg
Discharge Temperatures¹	N/A Up to 325 ºF
4500 Series Performance Range Delivers	N/A Continuous duty service. Mechanical seals are available for gas service applications.

Industry/Applications

Industry	N/A Aquaculture Cement and Lime Chemical Coal Bed/Landfill Dairy Dry Bulk Hauling Environmental Industrial Milling and Baking Oil and Gas Power Generation Process Gas Pulp and Paper Resin and Plastic Services Soil Remediation Vacuum Excavation Wastewater
Application for Aquaculture Industry	N/A Aeration
Application for Cement and Lime Industry	N/A Fluidization and Conveying
Application for Chemical Industry	N/A Vacuum Processing and Conveying
Application for Dairy Industry	N/A Automated Milking
Application for Dry Bulk Hauling Industry	N/A Trailer Unloading and Aeration
Application for Environmental Services Industry	N/A Sewer Cleaning and Portable Restroom Services
Application for Industrial Industry	N/A Material Vacuuming
Application for Milling and Baking Industry	N/A Blending and Conveying
Application for Oil and Gas Industry	N/A Gas Collection and Sparging
Application for Power Generation Industry	N/A Fly Ash Conveying and Aeration
Application for Process Gas Industry	N/A Gas Boosting
Application for Pulp and Paper Industry	N/A Chip Conveying and Process Vacuum
Application for Resin and Plastic Industry	N/A Processing and Conveying
Application for Soil Remediation Industry	N/A Vacuum Extraction and Sparging
Application for Vacuum Excavation Industry	N/A Potholing and Slurry Recovery
Application for Wastewater Industry	N/A Aeration and Backwashing
Note for Industry and Application	N/A The table illustrates industries which depend upon the 4500 Series to deliver clean, oil-free air to a wide range of global applications.

Additional Information

N/A The 4500 Series cycle
With every rotation of the blower drive shaft, two lobe impellers turn in opposite directions transferring a constant volume of air or gas from inlet to discharge.

4500 Series Design Features

N/A

Rated for continuous duty in all industrial applications.
Provides longer life, simplified maintenance and reduced service intervals.
Permits higher speeds and performance ratings.

Rugged Construction

N/A

Compact, heavy-duty, and produced from high strength materials.
Advanced case design with increased vent areas.
The impeller case is precision machined from a single cast of high tensile iron and ribbed externally to prevent distortion.
Ductile iron impellers equipped with one-piece alloy steel shafts.
Equipped with bearings designed for heavy-duty applications and durability.

The 4500 Series Incorporates Simplified Timing

N/A

Simple and precise timing gears maintain proper clearance between the impellers.
Grip rings replace conventional timing hubs and guarantee the timing gears are mounted square and concentric to the shaft, resulting in minimum gear noise and wear.
Located between the gear and the shaft, grip rings are sets of two complementary wedge section rings.
Grips rings expand against the bore of the gear and contract on the shaft, ensuring an immovable friction fit.

Noise Reduction

N/A

Elliptical shaped inlet port minimizes inrush air noise.
An outlet port permits gradual release of downstream air and noise.
These ports significantly reduce air noise, minimize mechanical loading, and control vibration.

Lubrication

N/A

Timing gears and anti-friction bearings utilize abundant, dual-splash lubrication.
Dual-splash lubrication eliminates the need for the customary pump, sump and vulnerable external tubing.
Visual oil level indicators are located at both ends.

Bearings

N/A

Anti-friction bearings are locked against shoulders on both impeller shafts at gear end.
These bearings maintain factory-set clearances between head-plates and impellers.
Bearings are sized so the drive shaft may be direct or belt driven.

Why Choose the Gardner Denver™ Family of Blowers and Vacuum Pumps?

N/A

Backed by one of the largest distributor networks in the industry.
Every 4500 Series blower/vacuum pump is built under rigid ISO 9001:2008 quality standards.
Each machine is individually tested to meet rigorous performance specifications.
Requested by leading Original Equipment Manufacturers (OEMs) worldwide for a wide range of applications.
Every 4500 Series blower/vacuum pump is covered by a warranty of 18 months from the date of shipment or 12 months from the date of installation, whichever occurs first.

Superior Local Sales and Service

N/A

Extensive network of authorized Gardner Denver™ distributors.
Offering the most convenient local sales and service support in the industry.
Factory trained professionals are experts in blower/vacuum pump technology.
These professionals provide system installation guidance, troubleshooting and optimization recommendations for new or existing applications.

Protect your Gardner Denver™ Investment with AEON® PD, the Only Lubricant Specially Formulated for All Blowers in Any Environment

N/A

100% synthetic for matchless service life
AEON® PD retains its superior lubricating properties a minimum of four times longer than a premium grade mineral oil at most operating conditions
Eliminates seasonal oil viscosity grade changes
Superior lubrication in severe, high temperature applications
Available from your local authorized Gardner Denver™ distributor in convenient sizes to meet your needs
Food grade lubricant available

Retain your 4500 Series Advantage with Genuine Gardner Denver™ Replacement Parts

N/A

Gardner Denver™ guarantees to supply the proper parts for your specific blower every time
Replacement parts incorporate the most recent design upgrades
All parts meet Gardner Denver™ original manufacturing specifications and tolerances for guaranteed fit and function
Pre-packaged overhaul kits with detailed service manuals are available from your local authorized distributor

Note

N/A For 4500 Series Pressure Performance Data: Dark shaded areas are subject to temperature and drive limitations and must be referred to PD Blower Customer Service for proper application. Capacities and horsepower based on standard air at inlet.

¹ Short case units to 360 ºF

Vertical Configurations

Approximate Weight (Vertical)

A (Vertical)

B (Vertical)

C (Vertical)

D (Vertical)

E (Vertical)

F (Vertical)

G (Vertical)

H (Vertical)

J (Vertical)

J/2 (Vertical)

K (Vertical)

L (Vertical)

M (Vertical)

N (Vertical)

O (Vertical)

P (Vertical)

R (Vertical)

S (Vertical)

T (Vertical)

U (Vertical)

X (Vertical)

Y (Vertical)

Z (Vertical)

Horizontal Configurations

Approximate Weight (Horizontal)

A (Horizontal)

B (Horizontal)

C (Horizontal)

D (Horizontal)

E (Horizontal)

F (Horizontal)

G (Horizontal)

H (Horizontal)

J (Horizontal)

J/2 (Horizontal)

K (Horizontal)

L (Horizontal)

M (Horizontal)

N (Horizontal)

O (Horizontal)

P (Horizontal)

R (Horizontal)

S (Horizontal)

T (Horizontal)

U (Horizontal)

V (Horizontal)

X (Horizontal)

Y (Horizontal)

Z (Horizontal)

Specifications

Displacement

Industry Standards/Certifications

Series

Brands

Pressure Performance Data

Speed for Pressure Performance

Airflow at 6 psi Pressure and 1170 rpm Speed

Airflow at 6 psi Pressure and 1460 rpm Speed

Airflow at 6 psi Pressure and 1770 rpm Speed

Airflow at 6 psi Pressure and 1910 rpm Speed

Airflow at 6 psi Pressure and 2100 rpm Speed

Airflow at 8 psi Pressure and 1170 rpm Speed

Airflow at 8 psi Pressure and 1460 rpm Speed

Airflow at 8 psi Pressure and 1770 rpm Speed

Airflow at 8 psi Pressure and 1910 rpm Speed

Airflow at 8 psi Pressure and 2100 rpm Speed

Airflow at 10 psi Pressure and 1170 rpm Speed

Airflow at 10 psi Pressure and 1460 rpm Speed

Airflow at 10 psi Pressure and 1770 rpm Speed

Airflow at 10 psi Pressure and 1910 rpm Speed

Airflow at 10 psi Pressure and 2100 rpm Speed

Airflow at 12 psi Pressure and 1170 rpm Speed

Airflow at 12 psi Pressure and 1460 rpm Speed

Airflow at 12 psi Pressure and 1770 rpm Speed

Airflow at 12 psi Pressure and 1910 rpm Speed

Airflow at 12 psi Pressure and 2100 rpm Speed

Airflow at 15 psi Pressure and 1170 rpm Speed

Airflow at 15 psi Pressure and 1460 rpm Speed