Jensen Water Resources

Jensen Water Resources is comprised of two specialized teams: Jensen Pump Stations and Jensen Stormwater Systems.

The Jensen Pump Stations team provides high-quality pump stations for municipal, commercial, industrial, and residential applications. The Jensen Stormwater Solutions team provides products and systems for a diversity of stormwater best management practice applications.

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Designing Pump Stations to be Wipes Ready (WEF eShowcase)

Our division manager (Josh Dragon, P.E.) recently had the opportunity to present an eShowcase webcast for the Water Environment Federation (WEF). The discussion focused on the affect that nondispersible wipes have on submersible sewage pump stations and what steps designers can take to overcome these challenges. The specific challenges that wipes present for pump stations include:

  1. Affects on submersible pumps (ragging, shaft deflection)
  2. Affects on level detection (electrical shorts, float failure)
  3. Collection of debris & Fat’s/Oils/Grease (FOG) layer

Each challenge has its own unique solution, or combination of solutions. By understanding the challenges that each unique pump station application presents and pairing the appropriate solution, designers can increase the life-cycle of the station as well as reduce maintenance costs. Some of the solutions discussed in the webcast include:

  1. Utilizing sewage grinders or augers to reduce/remove debris
  2. Restraining pump impellers from lateral shaft deflection
  3. Utilizing pressure transducers as standard level detection with two fiber optic floats as back-up
  4. Reduction of debris and FOG using mixers, drop bowl’s, sloped basins, and clean out cycles

JWC_logo_webcastThe second half of the webcast was presented by our friends at JWC Environmental. Their discussion centered on how to retro-fit an existing pump station with a Muffin Monster or a Vertical Auger Monster. If you are unfamiliar with JWC Environmental and their products, you can learn more about their company by clicking here.

If you need help designing a pump station to be wipes ready, contact us today! (click here)

Valve Selection

One of the universal similarities between all of the Jensen Engineered System products is that each system uses various kinds of valves.  Valves enable the system to control the fluids that enter them in a predictable manner. Though there are numerous kinds of valves used for a variety of applications, this discussion focuses on the three basic valves used in almost all of our products and the basic function they serve.  These are check valves, isolation valves, and air/vacuum release valves.  This discussion will give a brief overview of each valve along with some basic design considerations.  For a more in-depth discussion, please refer to document downloads on this page.

Check Valves

10 inch swing check valveThe purpose of a check valve is to allow a fluid to move through it in one direction, but prevent it from flowing in the reverse direction.  In the case of a lift station, if we are trying to pump uphill and do not want all the water in the pipes coming back into the wet well when the pumps shut off, then a check valve should be specified immediately following the pumps. (more…)

Pump Curves

Reading and understanding centrifugal pump curves is the key to proper pump selection and more importantly reliable, efficient, pump applications. There are four important curves shown on the standard performance curve from the manufacturer. They are listed below and shown on the manufacturers curve see (figure 4).

a. Head
b. Efficiency
c. Power
d. Net positive suction head required (NPSHR)

single-line-pump-curve-2 (more…)

How a Submersible Pump Works

Basic Impeller Theory

The Impeller is the heart of the pump. It is the only part of the pump that adds energy to the liquid. Grossly simplifying the process, energy is added by accelerating the liquid from the smaller radius at the impeller inlet to larger radius at the impeller exit. The implications of this are that we can increase the amount of energy input into the fluid by increasing the outside diameter of the impeller or increasing the speed that it operates at.

(more…)

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