Rotor Stator Sets for Plastering, Screed, Mortar & Industrial Pumps

At Putzparts, we supply a wide range of rotor stator sets, rotors and stators for progressive cavity and screw pump systems used throughout the construction and industrial sectors.

Our range includes more than 80 different rotor and stator models for plastering machines, mixing pumps, mortar pumps, screed pumps, grouting equipment, refractory applications, 3D concrete printing and other material conveying systems.

Choose from popular rotor stator models including D6-3, D5-2.5, D7-2.5, D8-1.5, D8-2, 2L6, R7-1.5, R7-3, R8-3, 7515, 2L8 and many more.

Many models are available in different versions to suit specific machines, materials and operating requirements.

Can't find the rotor stator you need? Contact us with your machine model or existing pump designation and we will help you identify the correct set.

Rotor Stator Pumps: How They Work

How a Rotor Stator Pump Works

This video illustrates the operating principle of a progressive cavity pump and shows how the rotor and stator work together to continuously move material through the pump.

A rotor and stator form the central pumping element of a progressive cavity pump, also commonly referred to as a screw pump.

The metal rotor rotates inside an elastomer stator. Their matching geometry creates sealed cavities that move continuously through the pump as the rotor turns. This allows material to be conveyed with a controlled and consistent flow.

Rotor stator technology is particularly suitable for pumping viscous and abrasive materials commonly encountered in construction and industrial applications.

Depending on the rotor stator model, different combinations of output, pressure and maximum grain size can be achieved.

Rotor Stators for Different Applications

The correct rotor stator depends heavily on the material being pumped and the required output and pressure.

Our rotor stator range covers applications including:

• Plastering and rendering
• Mortar pumping
• Self-leveling and liquid screed
• Grouting
• Refractory materials
• Geopolymer materials
• 3D concrete printing
• Special mortars and construction materials
• Industrial material conveying

Different applications require different pump geometries, dimensions and stator compounds. Selecting the correct rotor stator is therefore important for achieving reliable output and good service life.

Rotor Stators for Leading Machine Manufacturers

Many rotor stator sets can be used across multiple machines and manufacturers when the relevant dimensions and technical characteristics match.

Our range includes rotor stators suitable for machines from manufacturers such as:

• PFT
• m-tec
• Putzmeister
• Ülzener
• Turbosol
• Brinkmann
• and other manufacturers of mixing and conveying equipment

Popular applications include machines such as the PFT G4, m-tec Duo Mix, Putzmeister MP25 and numerous other plastering, mixing and conveying pumps.

When selecting a replacement, do not rely on the machine manufacturer alone. Always check the actual rotor stator specification and compatibility.

How to Choose the Right Rotor Stator

Several technical characteristics determine whether a rotor stator is suitable for your machine and application.

Rotor Stator Model

The easiest starting point is the existing pump designation, such as D6-3, D8-2, 2L6 or R7-1.5.

If you know the exact model currently installed in your machine, search for the same designation in our shop.

Stator Diameter and Length

The physical dimensions of the stator must be compatible with the machine and pump configuration.

Rotor Head and Connection

The rotor connection must fit the machine's drive system. Two rotor stators with similar pumping characteristics are not necessarily interchangeable if the rotor heads differ.

Direction of Rotation

The required direction of rotation must correspond with the machine.

Output

Rotor stator models are available with very different conveying capacities. Select the pump according to the output required for your application.

Maximum Grain Size

The material and maximum aggregate or grain size must be suitable for the selected rotor stator.

Rubber Hardness

Stators are available in different elastomer compounds and hardnesses. Rubber hardness affects the characteristics of the pump and should be selected according to the material, required pressure and application.

If you are unsure which model is correct, send us the machine model, current rotor stator designation and, if possible, photos or dimensions. We can help identify the appropriate replacement.

Maintenance-Free and Adjustable Stators

Different stator designs are available depending on the rotor stator model and application.

Maintenance-Free Stators

Maintenance-free stators are designed to operate without manual retensioning. After installation, no additional adjustment of the stator is required.

They provide a straightforward solution where simple installation and operation are priorities.

Adjustable Stators

Adjustable or clampable stators allow the stator to be retensioned as wear develops.

Depending on the design, these may feature an integrated clamp or a slotted stator used with an external clamp.

Retensioning can compensate for wear and help restore pumping pressure during the usable life of the stator.

The correct design depends on the rotor stator model, machine and application.

Rotor Stator Pressure and Wear

Rotor stators are wear parts. Their service life depends on several factors, including:

• Pumped material
• Abrasiveness
• Grain size
• Operating pressure
• Pump speed
• Stator compound
• Correct setup and adjustment
• Cleaning and operating conditions

A decline in conveying pressure or output can indicate increasing wear.

Common signs of rotor stator wear include loss of pressure, reduced output, inconsistent or pulsating material flow and visible deterioration of the stator rubber.

Replacing worn components before complete failure can help avoid unnecessary downtime and maintain consistent pumping performance.

Frequently Asked Questions About Rotor Stator Sets

What is a rotor stator pump?

A rotor and stator are the primary pumping elements of a progressive cavity or screw pump. A metal rotor rotates inside an elastomer stator, creating moving sealed cavities that transport material through the pump.

This pumping principle is widely used for plaster, mortar, screed, grout and other viscous materials.

How do I know which rotor stator fits my machine?

Start with the designation of the rotor stator currently installed, such as D6-3, D8-2 or 2L6.

You should also check the stator dimensions, rotor connection, direction of rotation and machine compatibility. Similar-looking rotor stators are not always interchangeable.

If you are unsure, send us your machine model and the details of your existing rotor stator.

Can the same rotor stator be used in different machines?

Yes. Many rotor stator models are used by several machine manufacturers.

Compatibility depends on the rotor stator dimensions, rotor head, direction of rotation and other technical characteristics rather than the machine brand alone.

What is the difference between a maintenance-free and an adjustable stator?

A maintenance-free stator does not require retensioning during operation.

An adjustable or clampable stator can be retensioned as it wears. Depending on the model, the clamp may be integrated into the stator or fitted externally.

Both designs have advantages depending on the machine, material and operating conditions.

How long does a rotor stator last?

There is no fixed operating life for a rotor stator.

Wear depends on the pumped material, abrasiveness, grain size, operating pressure, speed, stator compound and working conditions. For this reason, rotor stators should be monitored according to their performance rather than replaced according to a fixed time interval.

What are the signs of a worn rotor stator?

Typical signs include:

• Reduced pumping pressure
• Lower output
• Pulsating or inconsistent material flow
• Increasing difficulty conveying the material
• Visible stator rubber wear or damage

A significant loss of pressure is often one of the clearest indications that the rotor stator is approaching the end of its useful life.

Should I replace the rotor and stator together?

In many cases, replacing the rotor and stator as a matched set provides the best pumping performance.

Installing a new stator together with a heavily worn rotor can result in an imperfect fit and may reduce the performance or service life of the new stator.

The condition of both components should therefore be checked when replacement is required.

What rubber hardness should I choose?

The appropriate stator compound and rubber hardness depend on the pumped material, required pressure and operating conditions.

Different rotor stator models may therefore be offered with different stator compounds or hardnesses. If you are unsure, tell us what material you are pumping and which machine and rotor stator you currently use.

What do rotor stator codes such as D6-3 or 2L6 mean?

Rotor stator designations identify specific pump geometries and configurations. They are useful for identifying the correct replacement, but the designation system is not identical across every rotor stator family.

For replacement purposes, the safest approach is to match the complete model designation and confirm the relevant dimensions and connection.

Can you help me identify an unknown rotor stator?

Yes. If you cannot identify your existing rotor stator, send us the machine manufacturer and model, photos of the rotor and stator, visible markings and relevant dimensions.

Our team will help you determine the appropriate replacement.

Need Help Finding the Right Rotor Stator?

With dozens of rotor stator models available, selecting the correct pump set is not always straightforward.

If you cannot find the model you need or are unsure about compatibility, contact the Putzparts team. We are happy to assist with rotor stator identification and technical questions.