Low Specific Speed Impellers

SIMSITE® Low Specific Speed Impellers.

SIMSITE® Structural Composite Low Specific Speed Pump Impellers are Superior to Metallic Impellers, because they are engineered to increase efficiency and eliminate cavitation and recirculation problems that are inherent in low specific speed pump impellers! ImpellerStore is able to do this because our SIMSITE® Impellers are not cast or molded. Rather, SIMSITE® Impellers are machined on the outside as well as the inside on 5 to 8 axis machining centers. Impellers that develop a low flow rate with a relatively high head are described as low specific speed impellers. A low specific speed impeller is one that is designed with a very large impeller diameter when compared to the impeller eye diameter. Low Specific Speed impellers have a geometry which has a larger outside diameter with relatively small, vane flow passages and exit ports. The specific speed of an impeller influences the shape of the Head–Capacity Curve (HQ Curve). Low specific speed impellers generate a much flatter HQ curve from shut off to the operating point.

Typical Low Specific speed Metallic Impeller suffering from Discharge Recirculation Cavitation as well as Corrosion.

Typical Low Specific speed Simsite® Impeller Which Never Corrodes in Seawater, Waste Water , Sewage or Chiorinate Water and is Cavitation Resistant.

Although these low specific speed impellers can deliver a higher head they are much more susceptible to discharge recirculation which will destroy a metallic impeller in a very short period of time. Fortunately, SIMSITE® Impellers are engineered to reduce or eliminate the effects of all types of cavitation. Because SIMSITE® Impellers are precision machined from solid blocks of the structural composite, the impeller vane geometry can be engineered utilizing CFD(Computerized Fluid Dynamics) techniques and programs to eliminate the vortexing and cavitation problems experienced by cast or molded metallic impellers. SIMSITE® Engineered composite impellers & Casing Rings offer even greater savings, because they can be engineered to make the pump operating point the Best Efficiency Point (BEP) which significantly increases efficiency! (The farther away the pump operates from BEP, the lower the efficiency, and the higher the radial loading, movement and vibration.) The machined vane surfaces provide smoother surface finishes, which allows for a lower coefficient of friction with self-lubricating qualities. Machined Structural Composite Impellers & Rings are 5 to 6 times lighter than metallic impellers and run on tighter wear ring to casing ring clearances. This provides reduction in mechanical losses as well as volumetric losses. Since machined composite impellers are perfectly balanced, both hydraulically and mechanically, and maintain this balance throughout the life of the pump, this reduces vibration, and allows the pump to operate more efficiently which reduces downtime and operational costs. Engineered structural composite products also prove light weight, reducing start-up load and shaft deflection. The result is an increase in the lifetime of Bearings, Seals, Rings and Sleeves!

ImpellerStore SIMSITE® Impellers & Casing Rings Are :

SIMSITE® Impellers & Casing Rings are the best Impellers & Casing Rings in the marketplace! The reason our Impellers are so good is because they are not cast, or molded. ImpellerStore manufactures high quality, precision machined, upgraded, efficient, Impellers & Rings from SIMSITE®, a unique and patented structural composite. ImpellerStore Products are patented and completely different from any other Impellers & Casing rings in the market place because they are fully machined from a solid block of Simsite,® which never corrodes in sea water, brackish water, river water, chlorinated water, waste water and many other chemicals. Our SIMSITE® Impellers and Casing Rings are truly unique, because they are completely (100%) machined on the inside as well as the outside. The 5-axis to 8-axis precision machining makes our SIMSITE® impellers perfectly balanced both mechanically, and hydraulically -- if an impeller is machined from one center position, there is NO Imbalance! Furthermore, because our impellers do not corrode in sea water, brackish water, river water, waste water and many chemicals, they do not go into an imbalance and therefore they do not experience performance degradation like metallic products. ImpellerStore SIMSITE® Impellers and Rings are excellent for new, repair, or retrofit applications. They are light weight and virtually indestructible. Wear of other pump parts including the pump casing are greatly reduced because of the SIMSITE® Impeller’s perfect balance, light weight, self-lubricating, sealing, and corrosion, erosion, & cavitation resistance. This means far less expense for replacement of parts, downtime, and years of trouble free performance. ImpellerStore SIMSITE® Impellers and Rings are designed for Superior Hydraulic Performance because the Impellers are computer engineered, designed, and precision machined. The impeller vane geometry can be engineered to maximize efficiency and performance. Problems such as recirculation, radial thrust, and cavitation can be minimized, or eliminated by upgrading to SIMSITE® Impellers & Rings. Impeller vane shapes can easily be modified to provide the best vane shape for specific applications and performance requests. .

For over 90 years
SIMS has been a leader in engineering pumps

Sims has been a leader in engineering pumps and pump products. From the invention of the original Sims pump valve to the development of the SIMSITE® impellers, pumps, mechanical seals, guide bearings, and valves, Sims continues to be a leader in innovative pump solutions for the marine and industrial markets. Sims focuses on innovative solutions for corrosion, erosion, and cavitation applications. Sims SIMSITE® impellers are superior to any other impellers on the market. SIMSITE® impellers never corrode in salt water, waste water, or chlorinated water applications and are excellent for many chemical applications. Since 1919, Sims has focused on complete customer satisfaction with every product manufactured. A unique unconditional customer guarantee is made possible by the highest standards of engineering, manufacture, and customer service. SIMSITE® is a patented family of superior structural engineered composite pumps and pump parts approved by the US Navy for Navy, Marine, chemical, industrial, and waste water applications.

INCREASE PERFORMANCE, LONGEVITY, RELIABILITY

100% machined from one piece, on the inside as well as the outside from solid blocks of the structurally engineered composite, which offers superior mechanical strength, perfect balance, better performance, smoother surfaces and longer life. SIMSITE® impellers and casing rings won’t gall or seize like metallic rings. Therefore, they can operate with a tighter clearance permitting less leakage through the rings and impeller which increases pump efficiency. Additionally, SIMSITE® casing rings seal the casing which prevents the "wash out" of the casing ring landing areas that is a common maintenance problem with centrifugal pumps. Reduces Noise and Vibration. Because of the high efficiency and the precision machined design of the SIMSITE® impeller, lightweight, and noise absorbing characteristics of the structural engineered composite, noise and vibration are reduced in the pump.

SIMSITE® Optimization.

It is all too common a problem – You purchased a pump for one specific performance and when you put the pump into service in your plant, or ship, the pump operates at another point completely different from the original design point (BEP – best efficiency point) of the pump because of your system requirements. In addition to being very inefficient, when you operate the pump away from the original design point or BEP, it causes a multitude of problems. These problems include excessive noise & vibration, shaft oscillation, cavitation, premature wear and failure of the mechanical seals, bearings, rings, sleeves and impellers. In extreme cases, the shaft will break. Fortunately, these problems can be easily resolved by installing SIMSITE® Impellers & Rings which have been re-engineered for your system requirements. Not only is the efficiency of the pump improved, but also the reliability and longevity of the complete pump issubstantially improved.