NETZSCH High-Precision Durable Pump Stator Pump Parts

Our brand provides professional overall technical solutions in fluid machinery and engineering. We specialize in industrial control and drive equipment, mechanical seals, and overseas field engineering solutions. Our ecosystem of specialized technologies and product brands empowers our clients with high-caliber technical guidance, commercial support, and integrated product solutions — including pumps, frequency converters, servo drives, PLC-HMI, industrial control cabinets, motors, mechanical seals and systems, couplings, gearboxes, and engineering solutions (overseas on-site 3D scanning reverse molding of pump replacement parts to your satisfaction, and on-site equipment debugging services by overseas dispatched engineers).

In a progressing cavity pump, the stator and rotor form the core sealing mechanism. The stator's internal double-helix elastomer liner creates stationary cavities; the rotor's single-helix profile rotates inside these cavities, creating a positive displacement action that moves fluid from suction to discharge.

1. Rotor Rotation — The single-helix rotor rotates eccentrically inside the double-helix stator liner, creating sealed cavities that travel from suction end to discharge end
2. Cavity Formation — As the rotor turns, the cavity at the suction side opens and fills with fluid; simultaneously, the discharge-side cavity closes and expels its volume of fluid
3. Continuous Flow — Each full rotation of the rotor advances one cavity length from suction to discharge, producing a smooth, pulsation-free flow proportional to speed
4. Pressure Seal — The stator liner and rotor surface maintain a seal along the helix; the number of sealing lines equals the number of stator heads

• Initial Clearance — The rotor is slightly smaller than the stator bore, with clearance defined at the build stage; this clearance allows rotor rotation without interference while maintaining sealing contact along the helix
• Run-In Wear — During initial operation, the rotor wears into the stator liner at the contact points, creating a conforming profile that optimizes sealing; this is normal and expected
• Gradual Performance Decline — As wear progresses, the clearance increases, reducing volumetric efficiency and increasing internal slip; flow rate decreases at constant speed
• Replacement Threshold — When flow rate has dropped below the acceptable minimum for the application (typically 10–15% below new condition), the stator is replaced as a complete assembly

1. NETZSCH Pump Model & Size Code — The pump series (Nemo, Tornado, etc.) and size code (e.g., NM038 or TN038) determine the stator geometry and dimensions
2. Stator Geometry — Head configuration (single/double), pitch length, and lead direction (right-hand or left-hand helix)
3. Elastomer Material — Confirm fluid type, temperature, and chemical environment for correct compound selection
4. Shell Material — Standard carbon steel shell or upgrade to stainless steel for corrosive fluid service
5. Certification Requirement — Standard industrial grade, FDA-compliant, or 3A sanitary certified as required
6. Quantity — Single replacement or bulk order; stators for identical pump models can be produced in repeat batches
7. Delivery — 20–40 days after deposit; longer lead time for custom elastomer compounds and stainless shells

Payment: 70% T/T deposit, balance against copy of B/L.