Square One Electric rebuilds all makes and models of industrial and commercial pumps throughout Delaware, Maryland, New Jersey, and Pennsylvania.


We provide a variety of pump repair, replacement, and installation services to numerous industries including water treatment, chemical, petroleum, manufacturing, facility maintenance, power generation, pulp and paper, food and beverage, marine, and many more.


Located in Dover, Delaware, our service shop is fully equipped with mechanical, machine, and rewind departments to service your equipment. Square One provides free pick up within our service area; we will diagnose your equipment and provide a repair vs. replacement quote.

Square One is also a certified factory warranty repair center for most pump brands; and we warranty our work.


In addition, Square One offers offers Planned Maintenance Programs for your industrial needs. Keep on top of routine maintenance to help avoid equipment failure and lost production. We will evaluate and design a custom Planned Maintenance Program around your preventative maintenance needs.


Onging issues? Let us help to assess your system and address the signs of possible pump system failure. This may be seen as an unusual sign of wear, heat generation, lubrication usage, vibrations, pressure, speed, noise, flow, strain, leakage, fugitive emissions, or power consumption; but we will help to keep your rotating equipment running smoothly, minimize downtime, and improve efficiency.

Most common services include:

  • Equipment Monitoring and Vibration Analysis

  • Field Service

  • Laser Shaft Alignment

  • Impeller Balancing 

  • Emergency Breakdowns

  • Removal, Installation, and Start-up

  • Troubleshooting

  • Machining: impeller trim; rebowling; volute repair; coupling boring and key slotting; surface grinding 

  • Fabrication: brass bushings; spacers; shafts; sleeves; wear/case rings

Types of Pumps we service include:

  • Submersible 

  • Wastewater / Sewage 

  • Split Case

  • Carbonator 

  • Grinder 

  • Vertical P-Base

  • Hollow Shaft 

  • Booster 

  • Positive Displacement

  • Chemical Feed

  • Close Coupled JM and JP

  • Fire 

  • Hot Water Circulators

  • Dewatering 

  • Sump 

  • Pool and Spa 




Fixing Leaks - Think Before You Tighten

When something is leaking, we tighten it, right? Well, that might not always be the way to go with equipment, and could cause more damage in the end.


Manufacturers torque gasketed flanges according to standards based on pressure, materials, temperature, etc. Tightening bolts in this case may damage or distort the equipment and cause the leak to get worse.


Mechanical Seals:

A clamped seal ring may become distorted - even a few millionths of an inch out of flatness can lead to leaking. Before tightening - or loosening - the bolts, check the manufacturer's torque requirements.



Leakage is a way of life with packaging, but when leakage increases, tightening should be minimal. Over-torquing will lead to excessive wear. If minor adjustments don't relieve the problem, then you probably have another problem on your hands.


Consider Cost When Selecting a Pump Seal

When selecting a pump seal, the most significant cost factor is the material selection for seal faces and elastomer secondary seals.


Carbon and ceramic seal faces are standard and least expensive.


For abrasive pumpage, various hard seal faces such as tungsten-carbide or silicon-carbide work better but are more expensive. Similarly, Viton or Kalrez elastomers may be needed for petro-chemical applications and they also will increase the cost of the seal.


For fresh water applications, hard face seal faces or chemical resistant elastomers are not helpful and won’t improve performance; they only cost more.

Square One mechanics are skilled in finding the most application-appropriate and cost effective seal for your equipment.


Simple rule to Follow When Replacing Equipment in Multiple Pump Systems

When sizing a replacement pump for multiple pump systems, remember:

  • Pumps in Parallel: Match Head

  • Pumps in Series: Match Flow


Failure to do so will cause one pump to overpower another, resulting in lost efficiency, rough operation, excessive heat, and (likely) pump failure.

Pump specific speed actually refers to general shape of impeller

Every pump has a calculated “Specific Speed” which is not the same as the operating speed of the pump.


In fact, the Specific Speed is a dimensionless ratio so it really isn’t a speed at all. The Specific Speed is calculated from the speed, capacity (gpm or l/s) and the head (ft. or meters) of the pump at the BEP (Best Efficiency Point).


The actual relationship is:

Ns = Specific Speed
N = Pump Speed
Q = Flow Rate
∆H = TDH (Total Dynamic Head)

The Specific Speed describes the general shape of the impeller. A quick look at the ratio shows that the flow rate (Q) is on the top and the head (H) is on the bottom.


So, an impeller that pumps a high flow rate and relatively low head will have a high specific speed. The impeller will have a large suction eye relative to the OD.


On the other hand, a pump that will pump very high head (pressure) will have a much lower Specific Speed, and a smaller suction eye compared to the OD.


There are other characteristics of an impeller related to the Specific Speed, but basically it describes whether an impeller is designed for high flow rate, or high TDH.




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Dover, Delaware

© 2016 by Square One Electric Motors