SEEPEX Sewage Slurry Wastewater Screw Pump Rubber Stator

Our self-developed brand was founded to serve the fluid machinery and engineering sector with comprehensive technical solutions. Our ecosystem of proprietary technologies and product brands offers clients high-caliber technical consultation, sales support, and comprehensive product solutions — including pumps, variable frequency converters, servo drives, PLC-HMI, control cabinets, motors, mechanical seals and assemblies, couplings, gearboxes, and full-scope engineering services (overseas on-site 3D scanning reverse molding of pump replacement parts and equipment debugging by our engineers deployed internationally).

SEEPEX Stator is the stationary elastomer-lined component in a SEEPEX progressive cavity pump (PCP) that works together with the rotor to create the positive displacement pumping action. The stator consists of a steel outer shell with a precision-molded and ground elastomer inner liner formed into a double-helix cavity. As the single-helix rotor rotates within this cavity, sealed pockets of fluid are progressively transported from the suction end to the discharge end of the pump.

The stator is the component in a PCP that typically sees the longest service life, commonly lasting 2–4 times longer than the rotor. However, it is also the more expensive replacement part due to the material and manufacturing complexity. The stator liner must maintain its helix geometry, elastic properties, and bond to the shell throughout its service life to sustain the pump's volumetric efficiency and discharge pressure capability.

SEEPEX stators are available with elastomer liners in natural rubber, NBR, HNBR, EPDM, FKM, and other compounds to match the specific fluid chemistry, temperature, and abrasiveness of the application. The steel shell can be supplied in carbon steel or stainless steel grades.

Our SEEPEX replacement stators are manufactured using compression molding and controlled vulcanization of the elastomer liner, with finished helix grinding and dimensional certification to match the original SEEPEX geometry, pitch, and lead.

1. Rotor Insertion — The single-helix rotor is inserted into the stator's double-helix cavity, creating a series of sealed chambers along the pump axis
2. Rotation Begins — As the rotor turns eccentrically, the sealed chambers travel axially from the suction side to the discharge side of the stator
3. Suction Opens — At the suction end, the first chamber opens to receive fluid while the discharge-side chamber simultaneously closes to expel its fluid
4. Continuous Displacement — Each rotor revolution advances one full chamber from suction to discharge, producing a smooth, metered, pulsation-free flow rate directly proportional to rotor speed

• Precision Helix Reproduction — The stator liner's double-helix geometry is replicated to OEM specifications, ensuring correct rotor-stator contact trajectory and cavity sealing
• Bond Integrity Assurance — Vulcanization parameters (temperature, pressure, time) are controlled to produce a consistent elastomer-to-metal bond that resists delamination under pressure cycling
• Material Certifications — Elastomer compound certification (durometer, tensile, elongation) and shell mill cert provided with each stator
• FDA & Sanitary Grades — FDA-compliant and 3A-sanitary stator assemblies available for SEEPEX hygienic series pump applications
• Reverse Engineering — For older or modified pump configurations, FARO 3D scanning of the worn stator or the rotor enables accurate stator reproduction