YEOMANS PUMPS
Frequently Asked Questions


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What are the available discharge sizes for Yeomans pumps?

Here is a summary of our standard discharge sizes by Series / Type designation:

Series 3000 - Suspended, Screened Wet-Pit Pumps: 1-1/2" ~ 8"    (38mm ~ 203mm)
Series 6000 - Dry-Pit Non-Clog Pumps: 4" ~ 20"    (102mm ~ 508mm)
Series 8000 - Suspended, Non-Clog Wet-Pit Pumps: 4" ~ 12"    (102mm ~ 305mm)
Series 9100 - Submersible Non-Clog Pumps: 3" ~ 14"    (76mm ~ 356mm)
Series 9235 - Dry-Pit Submersible Non-Clog Pumps: 4" ~ 20"    (102mm ~ 508mm)


NOTE: For sizes not listed above please contact us with details of your application and capacity/head requirements.

Do you offer Explosion-Proof submersible pumps?

Yes, Yeomans Series 9100 submersible non-clog pumps are available with third-party Factory Mutual (FM) listing for Class 1, Groups C & D hazardous locations.
 

Does Yeomans make "stainless steel" pumps and other special materials?

Yes, Yeomans can provide pumps made of stainless steel and a wide variety of other special metals. Unlike many other manufacturers who have ceased to offer special materials of construction, Yeomans has the experience and expertise to meet the special  materials requirements of  most any application. Our engineering staff will gladly assist you with the selection of cost-effective materials that will provide the optimum performance life and reliability for your particular project.

The following is a brief list of some of the more common materials we supply:

- Cast Iron - ASTM A48-83,  Classes 30 ~ 50
- Ductile Iron - ASTM A536-84, assorted grades
- Meehanite Cast Iron - ASTM A48, Class 50, Meehanite Grade GAH50
- Hi-Chrome Cast Iron - ASTM A532-82, Class 3, Type A  (hardness up to 650 BHN)
- 304 & 316 Stainless Steel - ASTM A743/A743M-84, Grades CF8 & CF8M
- "Duplex" Stainless Steel (CD4MCu) - ASTM A890/A890M  (UNS No. J93370)
- Alloy 20 - ASTM A743/A743M-84, Grade CN-7M
- Hastelloy-B - ASTM A494-N-12M
- Navy "G" Bronze - ASTM B584-85a (UNS No. C90300)

Many additional materials are available. Please feel free to contact us to discuss your specific requirements. When contacting us, please provide the following applications information:
- Description of the pumped liquid, including pumping temperature range and pH levels
- Type, size and percentage of solids in the liquid
- Details about any corrosives or other chemicals in the pumped liquid
- Pump duty cycle / frequency of operation

What types of sealing options can Yeomans supply?

For Yeomans dry-pit pumps, the standard sealing method is the packed stuffing box with either grease lubrication or water flush connections. As an option, Yeomans can furnish a wide variety of commercially available mechanical seals to meet the customer's specific requirements. There are normally several "pros and cons" for each type of seal; therefore, we urge you to contact us for recommendations pertaining to your particular application. When contacting us, please provide the following applications information:
- Description of the pumped liquid, including pumping temperature range and pH levels
- Type, size and percentage of solids in the liquid
- Details about any corrosives or other chemicals in the pumped liquid
- Details about availability of external sealing/flush water supply

Yeomans submersible pumps are supplied with Self-Sintered Silicon Carbide Graphite Composite (SSC-GC) mechanical seals. This state-of-the art material, combined with the superior design of the seal system,  provides the customer with unparalleled seal performance and reliability. To read more about it, please refer to the following document: Silicon Carbide Mechanical Seal Report

Does Yeomans offer a software program for pump sizing and selection?

Yes!  Yeomans offers two (2) software systems:

PumpfinderPlus® v8
The PumpfinderPlus software is designed for installation and operation on the user's PC. The pump curves include a drop-down menu for accessing catalog documents applicable to the pump selection (e.g. specifications, drawings, data sheets).

ePump-Flo
The ePumpFlo system provides online pump selection and sizing without the need to download or install any software. Like PumpfinderPlus, the pump curves include a drop-down menu for accessing catalog documents applicable to the pump selection.

Can Yeomans wet-pit submersible pumps be operated in a non-submerged or partially-submerged condition?

A simple "yes" or "no" answer to this question would be misleading at best. There are many considerations that must be evaluated in order to determine the minimum submergence requirements. In addition to motor cooling considerations, there are important hydraulic issues that should be evaluated. To help address these issues, we have prepared the following technical paper which we hope will be of interest to you: Submersible Pumps - Minimum Submergence Considerations.

I'm not familiar with your SHONE® Pneumatic Ejectors. What's so special about them?

The SHONE Pneumatic Ejector was invented by Sir Isaac Shone and first installed in the British Houses of Parliament in 1870. Due to the near perfection of the original design, no radical improvements or changes have been required to the present day. The first SHONE system in the United States was installed in 1889 at the Auditorium Theater Building (now part of Roosevelt University) in Chicago, Illinois. This duplex system is still in operation today, more than 100 years later, and has required only minimal maintenance. Since that time, literally thousands of SHONE systems have been installed throughout the US and overseas for industrial, commercial, municipal and governmental clients.

The simple design of the SHONE pneumatically operated system eliminates the electric motors, controls, accessories and periodic maintenance commonly associated with conventional pumping systems. They are particularly well-suited for sites with plant-air available, thereby eliminating the need for a dedicated compressor system. The SHONE can't be beat for the handling of large solids and air-entrained liquids such as sewage and scum. The unparalleled performance and reliability of the SHONE system allows Yeomans Pump to provide an exclusive 25 year warrranty!

» Click here to view video of SHONE operation


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