Case Studies

Centex Success Story

Retrofit For Middle East Pump Station

A municipality in the Middle East was facing several challenges at their main pump station, which is also one of the largest in the region. Competitor’s pumps were installed at this site which not only were they incorrectly sized, but were also presenting a myriad of mechanical problems.
Among these problems were mechan-ical seal failures that occurred as often as every week. Seal replacement for pumps this size presents a difficult and expensive task, which was costing the municipality hundreds of thousands of dollars every month and a staggering amount of downtime.

We approached the municipality and performed a detailed hydraulic analysis of their pump station, and selected the proper Cornell pump model for them. When we presented our solution to the customer, they mentioned that they would like the pumps to be able to perform a sump cleaning cycle, where they could remove as much wastewater from the sump as possible, well below the pump’s datum. For this requirement, we developed Cornell’s first vacuum-assisted priming system for vertical pumps, the Verti-Prime. This system allows for automatic priming and re-priming of the pumps when operating under suction lift conditions. It includes a Run-Dry feature which prevents damage to the mechanical seal while the pump is operating under dry conditions.
The challenge we then faced was to match the existing piping preparations with our smaller pump, for which our Engineers designed custom one-of-a-kind complex fittings that matched the preparations without compromising hydraulics.
Special composite shafting was supplied along with these pumps, which provide better performance than steel shafting while their lighter weight allows for easier installation and maneuverability.
Our pumps have been in operation since 2013 and they are performing as designed.

APPLICATION DETAILS
PUMP MODEL18NHG34-VF30
QUANTITY2 Sets
FLOW850 l/s
HEAD62 meters
HYDRAULIC EFFICIENCY84%
MOTOR POWER750 kW
MOTOR SPEED1000 RPM
SHAFTING LENGTH8 meters
SHAFTING MATERIALComposite
PUMP FEATURESVerti-Prime vacuum-assisted priming with Run-Dry for mechanical seal

Centex Success Story

ALL-terrain Mobile pumping unit
for Mexico City

Centex Fluid Products were approached by to design and build a pumping system to be permanently mounted on an all-terrain vehicle specifically designed for pumping large volumes of flood water for use during disasters in Mexico City and other surrounding areas. In response for a more efficient solution for their pumping needs during a flood, Centex designed a high-volume self-priming pump unit capable of achieving flows as high as 13,000 US GPM. The discharge of the trailer is comprised of a manifold with two 8” and two 6” flanges and a 16” suction necked reduced down to four 8” lines via a common manifold to keep the overall weight and manageability of the hoses within the weight limits of the few people handling them. The pump station has a totally self-contained vacuum priming system which allows the pumping station to automatically prime and re-prime on demand. It is powered by a diesel engine.
One of the most important features of this highly engineered pumping system is that it can travel to the toughest remote locations. This mobile pump station can transverse creeks, rocks, and climb up to a 45 degree incline to ensure that flood relief can be provided under any terrain no matter how challenging the conditions might be.
APPLICATION DETAILSPUMP MODEL: 14NHGH-RP-F18DB
QUANTITY20 SetsHYDRAULIC EFFICIENCY82%
FLOWUp to 13,000 GPMENGINE MODEL6068HF485
HEAD30 metersENGINE POWER 750 kW
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Case Studies