Seepex® MD Series Pump Parts
Model-based replacement rotors, stators, drive shafts, coupling components, joint parts and seals for supported Seepex® MD metering pumps.
MD replacement selection begins with the complete pump model, stage configuration and required component. Photographs and accurate dimensions help confirm low-flow pumping-element and drive details.
Replacement Parts for Seepex® MD Metering Pumps
Seepex® MD pumps are associated with controlled low-flow metering and dosing service. Their progressive cavity pumping principle provides nearly pulse-free positive-displacement flow, but the small pumping-element geometry makes correct model, stage and dimensional identification especially important.
The rotor and stator must operate as a matched dimensional system. Internal wear, elastomer changes, corrosion or an incorrect interference relationship can affect slip, starting torque, repeatability and pressure capability.
ACCA reviews supported MD replacement components using the complete model, component type, dimensions, photographs and service conditions. A drawing or sample may be requested for uncommon, modified or legacy configurations.
Seepex® MD Model Coverage
These model designations represent common MD metering configurations reviewed within the aftermarket market. Final availability and fit must be confirmed for the complete model and component requested.
Very-Low-Flow MD Models
Small pumping elements used where controlled dosing and repeatability are important.
Low-Flow MD Models
Metering sizes that may be supplied in different stage and material configurations.
Additional MD Configurations
Other MD, MDF, MDC, MDT and related constructions are reviewed individually using complete model and dimensional information.
MD Replacement Components
Metering Rotors
Replacement rotors reviewed for model, stage geometry, material, coating, dimensions and surface condition.
Metering Stators
Replacement stators selected around model, geometry, elastomer, process fluid, temperature and pressure.
Drive Shafts
Replacement shafts confirmed from complete model, connection details, critical dimensions and seal surfaces.
Coupling Components
Coupling rods, pins, bushings, sleeves, retainers and related torque-transmission components.
Joint Components
Joint sleeves, seals, O-rings and associated wear items reviewed for the installed construction.
Mechanical Seals
Seal components evaluated around shaft dimensions, seal arrangement, fluid, temperature and pressure.
Packing Components
Packing and gland components reviewed when the installed MD construction uses a packed arrangement.
Casing Components
Supported suction, discharge and related casing items evaluated using model and dimensional information.
Special and Legacy Parts
Uncommon components evaluated using photographs, accurate measurements, drawings or physical samples.
MD Rotor and Stator Selection
| Selection Item | Information Needed | Why It Matters |
|---|---|---|
| Complete MD model | Every letter, number and suffix | Separates size, geometry, stages and construction variants |
| Stage configuration | Complete model suffix and pumping-element information | Affects pressure capability and rotor/stator length |
| Rotor construction | Material, coating, dimensions and condition | Affects corrosion, wear and rotor-stator interference |
| Stator elastomer | Known compound, fluid, temperature and cleaning chemistry | Affects compatibility, swelling, hardness and service life |
| Flow requirements | Required flow, speed range and application | Supports review of metering performance and installed geometry |
| Seal arrangement | Photographs, shaft dimensions and seal details | Distinguishes mechanical-seal and packed configurations |
How to Request Seepex® MD Parts
Provide every letter, number and suffix shown in the MD designation.
State whether the request is for a rotor, stator, shaft, coupling part, joint item, seal or another component.
Include full-length and close-up views of connections, ends, seal surfaces and distinguishing features.
Provide overall length, diameters, connection measurements and other available critical dimensions.
Include fluid, temperature, pressure, speed, cleaning agents and known material requirements.
Typical MD Metering Applications
Polymer Feed
Controlled transfer and dosing of polymer solutions used in water and wastewater treatment.
Chemical Dosing
Low-flow delivery of process chemicals, additives, reagents and treatment chemicals.
Viscous Additives
Metering of oils, resins, coatings, adhesives and other viscous products.
Food Ingredients
Dosing of syrups, concentrates and shear-sensitive ingredients where materials are suitable for the service.
Pulp and Paper Additives
Controlled feed of starches, dyes, retention aids, coatings and process chemicals.
Industrial Process Feed
Repeatable low-flow delivery for production, treatment and blending processes.
Frequently Asked Questions
What information identifies a Seepex® MD replacement part?
Send the complete MD model, component required, clear photographs and critical dimensions. Include operating and material information when requesting a rotor, stator or seal.
Does the numeric MD size identify the complete part?
No. Stage configuration, material, joint construction, seal arrangement and dimensions can vary. Provide the full model designation.
What MD components can ACCA supply?
Supported components may include rotors, stators, drive shafts, coupling and joint parts, seals, packing components and selected casing items.
Why must an MD rotor and stator be evaluated together?
Their dimensional relationship controls sealing, slip, starting torque and metering performance. Wear or an incorrect match can reduce repeatability.
How is the correct MD stator elastomer selected?
Selection should consider the complete fluid, temperature, pressure, solids, cleaning chemistry and previous service history.
Can ACCA review a special or obsolete MD component?
Yes, when sufficient photographs, measurements, drawings or a physical sample are available to evaluate the required form, fit and function.
Return to the Seepex® Pump Parts hub for BN standard pumps, BT feed and hopper pumps, and special or legacy equipment.
Request Seepex® MD Series Pump Parts
Send the complete MD model, component required, photographs and available dimensions. ACCA will review the information required to confirm a supported replacement.
Complete MD model
Component required
Clear photographs
Critical dimensions
Fluid and operating details
MD size and stages
Pumping-element geometry
Component construction
Material requirements
Quotation requirements
Trademark Disclaimer: Seepex® is a registered trademark of its respective owner. References to Seepex® are used solely to identify compatible equipment. ACCA Pumps is an independent aftermarket manufacturer and is not affiliated with or endorsed by the trademark owner. Read the full disclaimer.