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MOYNO

MOYNO is a brand of progressive cavity (PC) pumps, a technology originally developed by the company in the 1930s. The brand is owned by Robbins & Myers, Inc., and its product line is centered on positive-displacement pumps that use a single helical rotor turning inside a double-helix stator. This design, often referred to as a wobble stator pump, enables the handling of fluids with high viscosity, solids content, or shear-sensitive characteristics. MOYNO pumps are used across industrial, municipal, and commercial applications, including water and wastewater treatment, chemical processing, food and beverage production, and oil and gas operations. The product families supplied by 3G Electric include motorized progressive cavity pumps (direct-drive AC motor, cast iron housing, Buna-N elastomers, stainless steel rotor), bare-shaft progressive cavity pumps (same materials, mechanical seal with carbon face), and repair kits containing stators, flex joints, and seals. The pumps are rated for water service and are available in multiple frame sizes and flow capacities. Construction materials—cast iron body, Buna-N stator, stainless steel rotor—are selected for corrosion resistance and compatibility with a range of non-aggressive fluids. The wobble stator design provides a continuous, non-pulsating flow, which is advantageous for metering and transfer duties. 3G Electric stocks MOYNO pumps and repair kits in multiple configurations, including models with integrated motors and bare-shaft units for custom drive arrangements. The repair kits are specific to pump model numbers (e.g., 35601, 35651) and include the stator, which is the primary wear component in progressive cavity pumps. 3G Electric supports global procurement with logistics for industrial equipment, ensuring that replacement parts and complete pump assemblies are available for maintenance schedules and new installations. The brand’s long history in positive-displacement pumping means that specifications, dimensions, and performance curves are well-documented, allowing engineers to select the correct pump for given flow rate, pressure, and fluid properties. For buyers, the key technical considerations are rotor-stator fit, material compatibility, and seal type—all of which are addressed in the product specifications provided by 3G Electric.

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About MOYNO

MOYNO is a brand of progressive cavity (PC) pumps, a technology originally developed by the company in the 1930s. The brand is owned by Robbins & Myers, Inc., and its product line is centered on positive-displacement pumps that use a single helical rotor turning inside a double-helix stator. This design, often referred to as a wobble stator pump, enables the handling of fluids with high viscosity, solids content, or shear-sensitive characteristics. MOYNO pumps are used across industrial, municipal, and commercial applications, including water and wastewater treatment, chemical processing, food and beverage production, and oil and gas operations. The product families supplied by 3G Electric include motorized progressive cavity pumps (direct-drive AC motor, cast iron housing, Buna-N elastomers, stainless steel rotor), bare-shaft progressive cavity pumps (same materials, mechanical seal with carbon face), and repair kits containing stators, flex joints, and seals. The pumps are rated for water service and are available in multiple frame sizes and flow capacities. Construction materials—cast iron body, Buna-N stator, stainless steel rotor—are selected for corrosion resistance and compatibility with a range of non-aggressive fluids. The wobble stator design provides a continuous, non-pulsating flow, which is advantageous for metering and transfer duties. 3G Electric stocks MOYNO pumps and repair kits in multiple configurations, including models with integrated motors and bare-shaft units for custom drive arrangements. The repair kits are specific to pump model numbers (e.g., 35601, 35651) and include the stator, which is the primary wear component in progressive cavity pumps. 3G Electric supports global procurement with logistics for industrial equipment, ensuring that replacement parts and complete pump assemblies are available for maintenance schedules and new installations. The brand’s long history in positive-displacement pumping means that specifications, dimensions, and performance curves are well-documented, allowing engineers to select the correct pump for given flow rate, pressure, and fluid properties. For buyers, the key technical considerations are rotor-stator fit, material compatibility, and seal type—all of which are addressed in the product specifications provided by 3G Electric.

Common Applications

  • Water and wastewater treatment — MOYNO motorized progressive cavity pump (model 33359) for sludge transfer
  • Chemical processing — MOYNO bare-shaft progressive cavity pump (model 34401) for metering viscous additives
  • Food and beverage production — MOYNO wobble stator pump (model 35601) for pumping shear-sensitive syrups
  • Oil and gas operations — MOYNO progressive cavity pump (model 33201) for crude oil transfer with solids
  • Industrial manufacturing — MOYNO pump repair kit (part 3119123000) for maintaining pump model 35651 in coolant systems
  • Municipal water supply — MOYNO motorized pump (model 34459) for raw water intake and transfer

Frequently asked questions

Common questions about MOYNO from 3G Electric.

What is the operating principle of a MOYNO progressive cavity pump?

A MOYNO progressive cavity pump uses a single helical rotor that rotates inside a double-helix stator. As the rotor turns, cavities form between the rotor and stator and progress from the suction side to the discharge side, creating a continuous, non-pulsating flow. This design allows the pump to handle viscous fluids, slurries, and shear-sensitive materials. The wobble stator refers to the stator’s elastomeric material that deforms to accommodate the rotor’s eccentric motion.

What materials are used in MOYNO pump construction for the models supplied by 3G Electric?

The MOYNO pumps stocked by 3G Electric feature a cast iron pump body, a Buna-N (nitrile) stator, and a stainless steel rotor. The mechanical seal uses a carbon face. These materials are suitable for water service and many non-aggressive industrial fluids. Buna-N provides good resistance to oils, fuels, and moderate chemicals, while stainless steel offers corrosion resistance. Cast iron provides structural strength and wear resistance.

What is included in a MOYNO pump repair kit from 3G Electric?

MOYNO pump repair kits supplied by 3G Electric typically include a stator, and may also include a flex joint, seal, and other wear components. For example, kit part number 3119033000 includes a stator, flex joint, and seal. The exact contents vary by kit model number. These kits are designed to restore pump performance by replacing the stator, which is the primary wear element in progressive cavity pumps.

How do I select the correct MOYNO pump repair kit for my existing pump?

To select the correct MOYNO repair kit, match the kit’s compatible manufacturer model number to your pump’s model number. For instance, kit 3119123000 is compatible with model 35651, and kit 3119033000 is compatible with model 35601. The kit part number and compatible model numbers are listed in the product specifications. If you have the pump’s serial number or original part number, cross-reference it with the kit’s compatible manufacturer model number.

What is the difference between a motorized MOYNO pump and a bare-shaft MOYNO pump?

A motorized MOYNO pump includes a direct-drive AC motor mounted to the pump, providing a ready-to-run assembly. A bare-shaft MOYNO pump has no motor and requires a separate drive system, such as a motor and coupling or a belt drive. Bare-shaft pumps offer flexibility for custom installations where the motor speed or mounting configuration must be tailored to the application. Both types use the same progressive cavity pumping mechanism.

Can MOYNO pumps handle fluids with solids or abrasives?

Yes, MOYNO progressive cavity pumps are designed to handle fluids containing solids, abrasives, and fibrous materials. The continuous cavity progression minimizes shear and allows particles to pass through without clogging. The Buna-N stator provides some resilience to abrasive wear, but for highly abrasive fluids, alternative stator materials may be recommended. The pumps are rated for water service but are commonly used in sludge, slurry, and wastewater applications.