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Bronze Pedestal Gear Pump - N11500

The Bronze Gear Pump N11500 is a high-performance, positive displacement gear pump designed for tough industrial applications. Its bronze construction, stainless steel shafts, and self-lubricating carbon bearings ensure long-lasting, low-maintenance operation. With sealing options like fluoroelastomer, PTFE, and acrylic graphite packing, the N11500 is ideal for fluids requiring chemical compatibility and reliable sealing. It handles viscous liquids, extreme temperatures, and high suction lift with ease, delivering consistent efficiency. Compatible with direct or pulley drives, it’s perfect for clean liquids with good lubricity. For expert guidance or to purchase online, contact our team today.

Bronze Corrosion Resistant Castings
The N11500 features bronze castings that offer outstanding corrosion resistance, ensuring the pump's longevity even in harsh environments. 


Stainless Steel Shafts & Fasteners

Fitted with 303 stainless steel shafts and fasteners, this stainless steel shaft pump is built to resist wear and maintain structural integrity over time. 


Self-Lubricating Carbon Bearings

The inclusion of high-performance carbon-graphite bearings pump reduces the need for maintenance. These self-lubricating pump bearings ensure smooth operation and extend the service life of the pump.


Acrylic Graphite Packing or Fluoroelastomer (S10) - Polytetrafluoroethylene (PTFE) (S11) Lip

The pump offers a choice of sealing materials, including acrylic graphite packing pump and fluoroelastomer, as well as PTFE lip seal pump options, to cater to different chemical compatibility pump requirements. 

For applications that demand mechanical seals, the N11HDM models are available. Additionally, for systems with heavy pulley loads, the model N11HDP is designed to meet those needs. 

Drive
The N11500 can be operated using either direct drive with flexible coupling gear pump or pulley drive gear pump configurations. Pulley-driven pumps require a pillow block bearing pump design at the drive shaft end to manage belt tension and maintain gear pump alignment, which is crucial for optimal performance.


Liquids & Temperatures
With its extremely close tolerances, the N11500 excels when pumping clean liquids with a good lubricity value pump characteristic. This gear pump for viscous liquids is designed to handle a wide temperature range of -400°F (~-240°C) to 4000°F (~2204°C), with the acrylic graphite packing rated up to 5000°F (~2760°C). Users should avoid temperature extremes to prevent damage to the pump.

For handling viscous liquids such as molasses or oils, the N11500 may require a low-speed gear pump setting to ensure effective operation. Consulting with the factory is advised to determine the recommended speeds and any necessary adjustments to motor horsepower. Additionally, large suction lines are recommended to prevent cavitation, which can lead to gear pump destruction.


Suction Lift

The N11500 is a high suction lift gear pump capable of lifting water up to 20 feet (~6.1 meters) on the suction side. While it is a self-priming gear pump, it is recommended to use a gear pump foot valve to enhance this capability. When pumping from natural water sources, a pump strainer and foot valve should be used to prevent debris from entering the pump and causing damage.

The Bronze Gear Pump - N11500 is designed for those who need a reliable and efficient pumping solution capable of handling a range of liquids and conditions. Its durable construction, combined with advanced features like chemical-resistant pump packing and temperature range gear pump capabilities, make it a top choice in the market. Contact us to learn more about how the N11500 can enhance your operations, or to request service for your gear pump needs.

Exploded View N11500

 

Item

Part Name

Quantity

OBN11500-21

OBN11510-21

OBN11500S5

OBN11510S5

OBN11500S3

OBN11510S3

1

Cover

Qty. 1

OB9333NN5N

OB9333NN5N

OB9333NN5N

OB9333NN5N

OB9333NN5N

OB9333NN5N

2

Screw

Qty. 8

OB5393

OB5393

OB5393

OB5393

OB5393

OB5393

3*

Snap Ring

Qty. 4

OB7651

OB7651

OB7651

OB7651

OB7651

OB7651

4*

O-Ring

Qty. 1

OB9797-158

OB9797-158

OB9797-158

OB9797-158

OB9797-158

OB9797-158

5*

Bearing

Qty. 4

OB5108

OB5108

OB5108

OB5108

OB5108

OB5108

6*

Drive Gear

Qty. 1

OB9833

OB9833

OB9833

OB9833

OB9833

OB9833

7*

Idle Shaft

Qty. 1

OB7652

OB7652

OB7652

OB7652

OB7652

OB7652

8*

Drive Shaft

Qty. 1

OB5685

OB5685

OB5685

OB5685

OB5685

OB5685

9*

Idle Gear

Qty. 1

OB9834

OB9834

OB9834

OB9834

OB9834

OB9834

10

Body

Qty. 1

OB9331NG7N

OB9331NG8N

OB9331NG7N

OB9331NG8N

OB9331NG7N

OB9331NG8N

11

O-Ring

Qty. 1

0

0

0

0

0

0

12a*

Packing

Qty. 3

OB6515

OB6515

OB9797-224

OB9797-224

OB9797-224

OB9797-224

12b*

Lip Seal

Qty. 1

OB7624

OB7624

NA

NA

NA

NA

13

Screw

Qty. 2

NA

NA

OB7262

OB7262

OB6500

OB6500

14

Nut

Qty. 2

OB9905

OB9905

NA

NA

NA

NA

15

Gland

Qty. 1

OB8395

OB8395

OB9853

OB9853

OB9853

OB9853

16

Screw

Qty. 2

OB7451

OB7451

OB7451

OB7451

OB7451

OB7451

17

Seal Adapter

Qty. 1

OB9904

OB9904

NA

NA

NA

NA

18*

Key

Qty. 2

OB6518

OB6518

OB6518

OB6518

OB6518

OB6518

19

Key

Qty. 1

OB5576

OB5576

OB5576

OB5576

OB5576

OB5576

20

Dowel Pin

Qty. 2

OB8597

OB8597

OB8597

OB8597

OB8597

OB8597

21

Tag

Qty. 1

OB9344

OB9344

OB9344

OB9344

OB9344

OB9344

22

Tag Screw

Qty. 2

OB9345

OB9345

OB9345

OB9345

OB9345

OB9345

-

Repair Kit

-

OB10642

OB10642

OB11048

OB11048

OB11058

OB11058

Repair Kit contains items 3, 4, 5, 6, 7, 8, 9, 12 & 18.

 

For shaft and gear subassemblies only refer to kit OB12015.

 

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