Item # 7028, DuroFlow® Industrial 70 Series Model 7028 Positive Displacement Blower with Vacuum Pump On Energy Machinery, Inc.

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The Gardner Denver™ DuroFlow® Family of Products

For nearly fifty years, Gardner Denver™ DuroFlow® positive displacement blowers/ vacuum pumps have combined leading-edge technology and on-the-job experience to continuously deliver enhanced designs and improved performance.

Unit of Measure

Dimensions

Weight	N/A 1200 lb
Port Size Connection	N/A 12 in
Connection Type	N/A Flanged
Shaft Diameter	N/A 2.50 in
Mounting Bolt Hole Diameter	N/A 0.88 in
A	N/A 51.44 in
B	N/A 23.62 in
C	N/A 17.25 in
D	N/A 5.62 in
E	N/A 18.00 in
F	N/A 22.00 in
G	N/A 31.50 in
H	N/A 15.00 in
J	N/A 2.75 in
K	N/A 15.25 in
L	N/A 8.25 in
M	N/A 11.75 in
N	N/A 26.97 in
P	N/A 3.50 in
Q	N/A 9.00 in
R	N/A 11.00 in
S	N/A 15.75 in
T	N/A 7.50 in

Pressure Performance Data

Speed for Pressure Performance	N/A 1500 rpm1800 rpm2650 rpm
Airflow at 4 psig Pressure and 1500 rpm Speed	N/A 51.4 bhp2094 ft³/min
Airflow at 4 psig Pressure and 1800 rpm Speed	N/A 63.4 bhp2646 ft³/min
Airflow at 4 psig Pressure and 2650 rpm Speed	N/A 100.3 bhp4118 ft³/min
Airflow at 6 psig Pressure and 1500 rpm Speed	N/A 75.4 bhp1944 ft³/min
Airflow at 6 psig Pressure and 1800 rpm Speed	N/A 92.2 bhp2496 ft³/min
Airflow at 6 psig Pressure and 2650 rpm Speed	N/A 142.0 bhp3968 ft³/min
Airflow at 8 psig Pressure and 1500 rpm Speed	N/A 99.5 bhp1818 ft³/min
Airflow at 8 psig Pressure and 1800 rpm Speed	N/A 121.1 bhp2370 ft³/min
Airflow at 8 psig Pressure and 2650 rpm Speed	N/A 183.8 bhp3842 ft³/min
Airflow at 10 psig Pressure and 1500 rpm Speed	N/A 123.6 bhp1707 ft³/min
Airflow at 10 psig Pressure and 1800 rpm Speed	N/A 150.0 bhp2259 ft³/min
Airflow at 10 psig Pressure and 2650 rpm Speed	N/A 225.5 bhp3731 ft³/min

Vacuum Performance Data

Speed for Vacuum Performance	N/A 1500 rpm1800 rpm2650 rpm
Airflow at 8 inHg Vacuum and 1500 rpm Speed	N/A 1989 ft³/min78.4 bhp
Airflow at 8 inHg Vacuum and 1800 rpm Speed	N/A 2541 ft³/min62.4 bhp
Airflow at 8 inHg Vacuum and 2650 rpm Speed	N/A 98.9 bhp4013 ft³/min
Airflow at 12 inHg Vacuum and 1500 rpm Speed	N/A 1715 ft³/min74.2 bhp
Airflow at 12 inHg Vacuum and 1800 rpm Speed	N/A 2267 ft³/min90.7 bhp
Airflow at 4 inHg Vacuum and 1500 rpm Speed	N/A 26.9 bhp2258 ft³/min
Airflow at 4 inHg Vacuum and 1800 rpm Speed	N/A 34.0 bhp2810 ft³/min
Airflow at 4 inHg Vacuum and 2650 rpm Speed	N/A 57.9 bhp4282 ft³/min
Airflow at 6 inHg Vacuum and 1500 rpm Speed	N/A 38.7 bhp2121 ft³/min
Airflow at 6 inHg Vacuum and 1800 rpm Speed	N/A 48.2 bhp2673 ft³/min
Airflow at 6 inHg Vacuum and 2650 rpm Speed	N/A 50.5 bhp4145 ft³/min
Airflow at 10 inHg Vacuum and 1500 rpm Speed	N/A 62.4 bhp1855 ft³/min
Airflow at 10 nHg Pressure and 1800 rpm Speed	N/A 76.5 bhp2407 ft³/min
Airflow at 10 inHg Vacuum and 2650 rpm Speed	N/A 119.4 bhp3879 ft³/min
Airflow at 12 inHg Vacuum and 2650 rpm Speed	N/A 139.8 bhp3739 ft³/min
Airflow at 14 inHg Vacuum and 1500 rpm Speed	N/A 86.0 bhp1563 ft³/min
Airflow at 14 inHgg Pressure and 1800 rpm Speed	N/A 104.9 bhp2115 ft³/min
Airflow at 14 inHg Vacuum and 2650 rpm Speed	N/A 160.3 bhp3587 ft³/min
Airflow at 15 inHg Vacuum and 1800 rpm Speed	N/A 112.0 bhp2032 ft³/min
Airflow at 15 inHg Vacuum and 2650 rpm Speed	N/A 170.6 bhp3504 ft³/min
Airflow at 16 inHg Vacuum and 2650 rpm Speed	N/A 180.8 bhp3415 ft³/min

Reach Higher with the DuroFlow® 45 Series

Cylinder Design	N/A One Piece Cylinder
Cylinder Design for Competitor A	N/A Two Piece Cylinder
Cylinder Design for Competitor B	N/A One Piece Cylinder
Cylinder Rib Design	N/A Integral Cylinder Ribs
Cylinder Rib Design for Competitor A	N/A Minimal Cylinder Ribs
Cylinder Rib Design for Competitor B	N/A Minimal Cylinder Ribs
Drive End Bearings	N/A Oversized Double Row Ball Angular Contact (Drive and Non-drive Shafts)
Drive End Bearings for Competitor A	N/A Single Row Ball (Non-Drive Shaft)
Drive End Bearings for Competitor B	N/A Cylindrical Roller
Dual Splash Lubrication	N/A Common Oil Sump
Dual Splash Lubrication for Competitor A	N/A Separate Oil Reservoirs
Dual Splash Lubrication for Competitor B	N/A Separate Oil Reservoirs
Gear Type	N/A Helical
Gear Type for Competitor A	N/A Straight Spur
Gear Type for Competitor B	N/A Helical
Gear Attachments	N/A Spline Gear Fit
Gear Attachments for Competitor A	N/A Taper Gear Fit
Gear Attachments for Competitor B	N/A Keyed Interference Fit
Shaft Seal and Seal Surface	N/A Viton Lip Seal with O-Rings Wear Sleeve
Shaft Seal and Seal Surface for Competitor A	N/A Viton Lip Seal on Shaft
Shaft Seal and Seal Surface for Competitor B	N/A Lip Seal on Shaft
DuroFlow® Advantages for Cylinder Design	N/A Easier assembly/Disassembly Ensures better tip clearance accuracy More rigid and durable Noise and pulsation dampening
DuroFlow® Advantages for Cylinder Rib Design	N/A Improves heat dissipation Reduces torsion on cylinder
DuroFlow® Advantages for Drive End Bearings	N/A Better equipped to handle radial and axial loads commonly caused by misaligned V-belt drives Increases bearing life
DuroFlow® Advantages for Dual Splash Lubrication	N/A Simpler maintenance
DuroFlow® Advantages for Gear Type	N/A Quiet and smooth mechanical operation Reduces backlash
DuroFlow® Advantages for Gear Attachments	N/A Eliminates timing loss and improves reliability
DuroFlow® Advantages for Shaft Seal and Seal Surface	N/A Extended shaft life Improves sealing method

Specifications

Pressure	N/A Up to 15 psig
Vacuum	N/A Up to 16 inHg
Airflow	N/A Up to 4282 ft³/min
Standard Temperature	N/A 68 ºF
Ambient Pressure	N/A 14.7 psia
Relative Humidity	N/A 36 %
Industry Standards/Certifications	N/A Compressed Air and Gas Institute (CAGI) Energy Star Partner ISO 9001:2008
Brands	N/A DuroFlow® Gardner Denver™

Applications to Meet Your Industry Needs

Industry	N/A Aquaculture Cement & Lime Chemical Dairy Dry Bulk Hauling Environmental Services Industrial Milling & Baking Power Generation Pulp & Paper Resin & Plastic 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 Power Generation Industry	N/A Fly Ash Conveying and Aeration
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 Vacuum Excavation Industry	N/A Potholing and Slurry Recovery
Application for Wastewater Industry	N/A Aeration and Backwashing

At-A-Glance Features

Each model delivers clean, oil-free air to a wide range of industrial applications.
World-class engineering and design.
Manufactured under rigid ISO 9001 standards by quality craftspersons.
Exhaustively tested to meet strict performance criteria to ensure unequaled service life under the most severe operating conditions.
Available in the 30, 45 and 70 Series with various configurations and rotor lengths.
Horizontal or vertical mounting configuration available for each blower.
Supported by a worldwide network of trained professionals and backed by a manufacturer’s warranty
- 18 months from the date of shipment or
- 12 months from the date of installation, whichever occurs first

Durable

Oversized bearings for added support and greater durability
- Gear-end bearings support rotor shafts, while drive-end double-row angular contact ball bearings fix the rotor position.
- Prevents destructive axial rotor movement commonly caused by misaligned V-belt drives.
Durable single-piece cast iron cylinder with integral ribs
- Provides greater strength and rigidity.
- Ribs improve heat dissipation and prevent distortion that can affect internal clearances reduce performance.
Innovative rotor/shaft design machined from a single, high-strength ductile iron casting and dynamically balanced
- Assures extra strength and rigidity to handle maximum loads on a continuous basis without fatigue, deflection or vibration.

Reliable

Dual Splash Lubrication
- Provides superior gear and bearing lubrication for longer life at all operating conditions.
- Reduces maintenance.
Timing gears are mounted on precision machined shaft splines
- Assures secure non-slip rotor timing even under surge conditions or high torque start-up.

Efficient

Helical timing gears, precision machined from alloy steel forgings
- Guarantees quiet and smooth mechanical operation at all speeds.
Noise Reduction
- Extra cylinder mass and progressive porting aid in reducing noise.
Vertical or horizontal mounting configuration with each blower
- Provides greater flexibility for installing into any new or existing system.

Flex-Mount™ Design Provides Maximum Installation Versatility

Flex-Mount™ Design and available porting connectors provide installation flexibility.
Assures interchangeability of existing installed DuroFlow® models or compatibility as replacement for most competitive models.
Reduces inventory requirements due to machine flexibility.

Genuine Gardner Denver™ Parts and Lubricants

Maintain the Gardner Denver™ performance advantage and reliability with Genuine GD Replacement Parts.
Protect your Gardner Denver™ investment with AEON® PD, the only lubricant specially formulated for all blowers in any environment.
- Now available:
  - AEON® PD-XD (eXtreme Duty)
  - Designed specifically for high ambient and high discharge temperature applications.
- Also available:
  - AEON® PD (standard applications)
  - AEON® PD-FG (Food Grade)

Quality Promise

Gardner Denver™ industrial blowers are manufactured under rigid ISO 9001 quality standards.
All models are thoroughly tested to meet the highest performance standards for unequaled service life under the most severe operating conditions.

Additional Information

Experience Proven Results with Gardner Denver™ - the Leader in Durability, Reliability and Efficiency
Reman (re¯ man´) n. A Gardner Denver™ positive displacement blower expertly assembled from genuine remanufactured and new parts

Must pass a slip test and a full-load, hot run test before shipment
Standard new product warranty included
The final word when repair or replacement is required

Note

Performance based on inlet air at standard temperature of 68 ºF, an ambient pressure of 14.7 psia and 36% relative humidity.
For performance at non-standard conditions, contact your authorized Gardner Denver™ representative.

Dimensions

Weight

Port Size Connection

Connection Type

Shaft Diameter

Mounting Bolt Hole Diameter

A

B

C

D

E

F

G

H

J

K

L

M

N

P

Q

R

S

T

Pressure Performance Data

Speed for Pressure Performance

Airflow at 4 psig Pressure and 1500 rpm Speed

Airflow at 4 psig Pressure and 1800 rpm Speed

Airflow at 4 psig Pressure and 2650 rpm Speed

Airflow at 6 psig Pressure and 1500 rpm Speed

Airflow at 6 psig Pressure and 1800 rpm Speed

Airflow at 6 psig Pressure and 2650 rpm Speed

Airflow at 8 psig Pressure and 1500 rpm Speed

Airflow at 8 psig Pressure and 1800 rpm Speed

Airflow at 8 psig Pressure and 2650 rpm Speed

Airflow at 10 psig Pressure and 1500 rpm Speed

Airflow at 10 psig Pressure and 1800 rpm Speed

Airflow at 10 psig Pressure and 2650 rpm Speed

Vacuum Performance Data

Speed for Vacuum Performance

Airflow at 8 inHg Vacuum and 1500 rpm Speed

Airflow at 8 inHg Vacuum and 1800 rpm Speed

Airflow at 8 inHg Vacuum and 2650 rpm Speed

Airflow at 12 inHg Vacuum and 1500 rpm Speed

Airflow at 12 inHg Vacuum and 1800 rpm Speed

Airflow at 4 inHg Vacuum and 1500 rpm Speed

Airflow at 4 inHg Vacuum and 1800 rpm Speed

Airflow at 4 inHg Vacuum and 2650 rpm Speed

Airflow at 6 inHg Vacuum and 1500 rpm Speed

Airflow at 6 inHg Vacuum and 1800 rpm Speed

Airflow at 6 inHg Vacuum and 2650 rpm Speed

Airflow at 10 inHg Vacuum and 1500 rpm Speed

Airflow at 10 nHg Pressure and 1800 rpm Speed

Airflow at 10 inHg Vacuum and 2650 rpm Speed

Airflow at 12 inHg Vacuum and 2650 rpm Speed

Airflow at 14 inHg Vacuum and 1500 rpm Speed

Airflow at 14 inHgg Pressure and 1800 rpm Speed

Airflow at 14 inHg Vacuum and 2650 rpm Speed

Airflow at 15 inHg Vacuum and 1800 rpm Speed

Airflow at 15 inHg Vacuum and 2650 rpm Speed

Airflow at 16 inHg Vacuum and 2650 rpm Speed

Reach Higher with the DuroFlow® 45 Series

Cylinder Design

Cylinder Design for Competitor A

Cylinder Design for Competitor B

Cylinder Rib Design

Cylinder Rib Design for Competitor A

Cylinder Rib Design for Competitor B

Drive End Bearings

Drive End Bearings for Competitor A

Drive End Bearings for Competitor B

Dual Splash Lubrication

Dual Splash Lubrication for Competitor A

Dual Splash Lubrication for Competitor B

Gear Type

Gear Type for Competitor A

Gear Type for Competitor B

Gear Attachments

Gear Attachments for Competitor A

Gear Attachments for Competitor B