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MONO Rubber Progressive Cavity Pump Rotor and Stator Replacement
Product Details
Model NO.:
Stator
Pump Package:
Carton And Wooden Cases
Testing:
Dynamic Balancing
Types Of Welding Parts:
OEM/ODM
Material Standard:
ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct
Material:
Sbbpf®, Epbpf®, VI, CB, PTFE, Eh, Vn
Certificate:
ISO9001:2015, ISO14001:2004
Mould:
Investment Casting Mould, Sand Casting Mould
Pump Model.:
Nm011by02s12b, Nm021by02s12b Nm031by02s12b, Nm038b
Suitable Brand:
MONO
Transport Package:
Carton And Wooden Cases
Specification:
According To The Drawings
Trademark:
HydroBlue
Origin:
China
HS Code:
84139100
Production Capacity:
10, 000 Tons Per Year
Highlight:
Rubber Netzsch screw pump rotor
,Progressive cavity pump stator replacement
,Netzsch pump parts with warranty
Payment & Shipping Terms
Minimum Order Quantity
1
Price
50
Product Description
MONO Stator & Rotor – Matching, Quality & How to Order
About Dongguan HydroBlue Co., Ltd.
DONGGUAN HydroBlue CO.,LTD. is an innovation-led enterprise delivering comprehensive technical solutions in fluid machinery, fluid engineering, industrial automation, and frequency conversion technologies. Our cross-functional engineering team of 8 professionals in fluid engineering, electrical engineering, and electronic engineering blends academic research capabilities with agile manufacturing. Partnerships with Jiangsu University, Chinese Academy of Sciences, and Guangdong University of Technology keep our hydraulic design and surface coating capabilities at the leading edge internationally. Jiangsu University National Research Center of Pumps contributes to rotor-stator interference degradation modeling and seal line pressure distribution analysis for MONO pump element reliability; Chinese Academy of Sciences develops advanced hard chrome bath chemistry and HVOF spray process parameters for coating durability; Guangdong University of Technology integrates automated rotor-stator match measurement and cavity seal line verification into our quality assurance process.
Send us your pump model and stator & rotor requirements — our technical team will cross-check compatibility and respond with a professional recommendation.
OUR BRANDS & SERVICES
Our brand was established to deliver integrated technical solutions in the fluid machinery and engineering sectors. Backed by a complete portfolio of specialized technologies and product lines, we offer clients expert technical consultation, commercial support, and bundled product solutions — from pumps and frequency converters to servo drives, PLC-HMI, industrial control cabinets, motors, mechanical seals and assemblies, couplings, gearboxes, and full-cycle engineering services (overseas on-site 3D scanning reverse molding of pump replacement parts and field equipment debugging by our dispatched engineers internationally).
Stator & Rotor Matching Guide
|
Match Condition |
Performance Impact |
Visual / Measurable Sign |
Recommended Action |
|---|---|---|---|
|
Correct interference fit |
Rated flow, rated pressure, minimal slip |
Pump operates at nameplate performance; liner wear pattern even along stator length |
Continue normal operation; monitor flow rate as part of routine maintenance |
|
Excessive interference |
High starting torque, rapid liner wear, overheating |
Hard to rotate pump shaft by hand; stator liner shows accelerated wear at suction third |
Verify rotor-stator match dimensions; reduce rotor coating thickness in next set |
|
Insufficient interference |
Low flow, poor self-priming, pressure below spec |
Pump fails to prime; slip increase at higher discharge pressure |
Replace with correctly matched set; worn rotor or stator liner may be salvageable individually |
|
Worn rotor + worn stator |
Progressive flow loss, erratic pressure delivery |
Both rotor coating and stator liner show visible wear; clearance measured beyond acceptable range |
Replace both as a matched set; running mismatched new/used elements accelerates new component wear |
Quality Inspection Points
|
Component |
Inspection Parameter |
Method |
Acceptance |
|---|---|---|---|
|
Stator shell |
Length, flange OD, shell ID, end squareness |
Caliper, CMM, height gauge |
±0.5 mm; squareness ≤ 0.1 mm |
|
Stator liner |
Helix double pitch, lead, bore dims |
Internal helical CMM |
±0.15 mm pitch; ±0.2 mm lead |
|
Stator liner |
Durometer hardness, bond integrity |
Shore A durometer, ultrasonic bond test |
±5 Shore A; bond ≥ 5 MPa |
|
Rotor shaft |
Shaft journal OD, runout, keyway |
Micrometer, V-block + dial indicator |
H6 tolerance; TIR ≤ 0.05 mm |
|
Rotor helix |
Single helix pitch, lead, profile, surface finish |
External CMM, profilometer |
±0.1 mm pitch; Ra ≤ 0.8 μm |
|
Rotor coating |
Coating thickness, hardness |
Eddy current, microhardness |
Per spec; ≥ 95% of surface area |
|
Match check |
Interference clearance at match point |
Rotor OD + stator ID verify |
Per MONO model spec |
How to Order
- MONO Pump Model & Size Code — Identifies the correct stator and rotor helix geometry, interference range, and flange configuration
- Assembly Type — Complete matched set (stator + rotor), stator only with existing rotor, or rotor only with existing stator
- Stator Liner Material — NR, NBR, HNBR, EPDM, or FKM based on fluid chemistry, temperature, and abrasiveness
- Rotor Material & Coating — Chrome steel (standard), 316L SS, 17-4PH, duplex; hard chrome (standard), HVOF, Stellite, or ceramic
- Certification Requirement — Standard industrial, FDA-compliant, or WRAS-approved for potable water
- Quantity — Single set (one pump) or multiple sets for fleet standardization
- Delivery — 20–40 days after deposit; coated rotors and HNBR/FKM stators 25–45 days
Payment: 70% TT in advance, balance against copy of B/L. Small orders via PayPal or Western Union.
FAQ
Q1: Can I replace only the rotor on a MONO pump and reuse the old stator?
A: Yes, if the old stator liner is in good condition without excessive wear, swelling, or bond failure. The new rotor must have the correct OD to match the existing stator's worn ID — a new rotor with standard OD may have excessive interference in a used stator. We recommend measuring the used stator bore and advising us of the dimensions so we can select or adjust the rotor OD accordingly.
Q2: How is the interference fit between the rotor and stator determined for different fluids?
A: The interference fit is set based on the pumped fluid's lubricity and temperature. For non-lubricating fluids (water, wastewater) a higher interference is used to maintain seal line contact. For lubricating fluids (oil) a lower interference is sufficient. For high-temperature service, the interference must account for differential thermal expansion between the steel rotor and the elastomer liner. We apply the standard MONO interference curve by pump model and adjust for the specific fluid conditions you specify.
Q3: Can your MONO stator and rotor be used as direct replacements for other PCP brands like SEEPEX or NETZSCH?
A: The stator and rotor geometry (pitch, lead, eccentricity, interference range) is specific to each PCP brand and model. MONO pumping elements are not interchangeable with SEEPEX or NETZSCH elements without significant pump modification. We recommend ordering the stator and rotor matched to your specific pump brand and model for guaranteed performance.
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Contact Us at Any Time
Room 1904, Building 1, Zhongtang Tianan Digital City, No.89 Jinyuan Road, Zhongtang Town,Dongguan City, Guangdong Province, China.
