Precision Constant-Wall Stator for Screw Pumps A precision constant-wall stator is a critical component in progressive cavity (PC) or screw pumps, designed to ensure efficient fluid transfer, consistent performance, and extended service life. Unlike conventional stators with variable wall thickness, a constant-wall stator maintains uniform elastomer thickness throughout its length, providing superior mechanical stability, reduced deformation under load, and enhanced resistance to wear and chemical degradation. Design and Functionality The stator consists of a rigid metal tube lined with a precisely molded elastomer, forming a double-helical cavity that interacts with the rotating screw (rotor). The constant-wall design ensures uniform stress distribution, minimizing localized wear and heat buildup. This is particularly beneficial in high-pressure or abrasive applications, where uneven elastomer thickness can lead to premature failure. Key features include: - Uniform Elastomer Thickness: Eliminates weak points, improving durability and pressure handling. - Precision Molding: Tight tolerances ensure optimal rotor-stator sealing, reducing slip and boosting volumetric efficiency. - Material Versatility: Elastomers (e.g., NBR, FKM, EPDM) are selected based on fluid compatibility, temperature, and abrasion resistance. Performance Advantages 1. Enhanced Efficiency: The constant-wall geometry maintains consistent contact with the rotor, reducing energy losses and improving flow stability. 2. Longer Service Life: Even wear distribution extends operational lifespan, lowering maintenance costs. 3. Reduced Vibration & Noise: Uniform elastomer damping minimizes pulsation and vibration, ideal for sensitive applications. 4. High-Pressure Capability: Withstands demanding conditions without distortion, ensuring reliable performance in oil & gas, wastewater, or chemical processing. Applications - Oil & Gas: Handling viscous crude, drilling mud, or multiphase fluids. - Wastewater/Slurry: Pumping abrasive or solids-laden media. - Food & Pharma: Hygienic transfer of shear-sensitive fluids. Conclusion The precision constant-wall stator represents an advanced evolution in screw pump technology, combining robust engineering with material science to deliver reliability, efficiency, and adaptability across industries. Its optimized design addresses common failure modes, making it a preferred choice for critical pumping applications.