Close-Coupled Rotary Lobe Pump

The TRA series sanitary close-coupled rotary lobe pump is a high performance positive displacement pump built for viscous fluid processing. This specialized machine transfers high viscosity materials, delicate emulsions, and fluids containing small soft solids safely. The series delivers a gentle, low shear pumping action that preserves product integrity across every single batch.

Sanitation drives the core mechanical design of this pumping equipment. The entire manufacturing series complies with United States Three-A hygienic standards and European CE safety certifications. Its internal flow path completely eliminates dead spaces or blind corners where bacteria could accumulate over time. This strict structural design satisfies global Good Manufacturing Practice and Food and Drug Administration requirements.

Advanced Integrated Monoblock Structural Architecture

The TRA series utilizes an optimized monoblock architecture engineered to maximize mechanical stability and spatial efficiency. In this advanced configuration, the pump housing and the gear drive are rigidly joined into a single, unified structural framework. This layout eliminates secondary shaft transmission components and external baseplate mounting complications entirely.

Compact Dimensional Footprint: The engineered consolidation shortens the overall physical length of the equipment by one hundred to two hundred and fifty millimeters. This compact design allows process engineers to install the pumping assembly easily within crowded production skids or confined factory floor spaces.

Enhanced Shaft Rigidity: The structural layout shortens the physical distance between the heavy duty drive bearings and the non contacting rotor mesh. This engineering design significantly minimizes rotor shaft deflection during continuous high pressure operations.

Vibration and Noise Suppression: Eliminating shaft flex prevents localized harmonic vibration and lowers operational running noise drastically. This mechanical stability ensures smooth torque delivery and reduces structural stress across the entire pump frame.

Optimized Mechanical Efficiency: The direct inline assembly reduces transmission friction and internal sliding losses. This optimization ensures maximum power transfer from the motor to the fluid medium, lowering energy consumption under heavy loads.

Extended Component Service Life: The elimination of runtime deflection protects internal elastomers and mechanical seals from uneven physical wear. This development extends the operational life of wear components and reduces routine plant maintenance costs.

Surface Finishing and Environmental Safety

Traditional industrial pumps rely on exterior painting or protective coatings to prevent oxidation in wet factory environments. However, rigorous clean in place washdowns and aggressive sanitization chemicals cause these paints to blister, chip, and peel over time. Flaking paint layers create a severe product contamination risk in high purity processing environments.

The TRA series eliminates this environmental hazard by using a complete mirror polished stainless steel exterior cladding. The smooth, continuous exterior surface possesses no crevices or paint layers that can degrade during daily facility washdowns. This structural refinement ensures the exterior of the pump remains as clean and sterile as the interior process path.

Drive Options and Speed Regulation

Different fluids require specific rotational speed strategies to ensure steady volumetric displacement. The product family offers multiple drive configurations to match distinct manufacturing layouts:

The TRA Basic Configuration: This model utilizes a manual mechanical step less speed variator, allowing factory operators to adjust flow rates directly on the plant floor. This model comes equipped with a protective stainless steel shroud to shield the drive mechanism.

The TRA Automated Configuration: This specific setup operates alongside an external variable frequency drive. The configuration provides wide range speed control and integrates easily with centralized programmable logic controllers.

The TRA -Ⅰ High Torque Configuration: This model employs a six pole motor designed specifically for frequency inverter control. It delivers high torque at low rotational speeds to transport dense materials without slipping.

The TRA -Ⅲ Custom Configuration: This heavy duty unit features a top mounted conical feed hopper that uses gravity to force heavy pastes into the rotor mesh. The configuration features a protective stainless steel cover and can be installed on a mobile stainless steel utility cart for multi station operation.

Frame Sizes and Volumetric Performance Ranges

The product line spans sixteen distinct frame sizes designated from frame zero five up to frame fifteen to match specific plant capacities:

Low Capacity Frame Zero Five: This micro unit delivers a nominal displacement of zero point zero two eight liters per revolution. Operated within a standard range of two hundred to one thousand revolutions per minute, it achieves a flow rate from three hundred and thirty to sixteen hundred and fifty liters per hour under a maximum discharge pressure of zero point six megapascals through diameter twenty millimeter ports.

Medium Capacity Frame Six: This mid range model provides zero point two seven seven liters per revolution, generating up to fifteen thousand liters per hour using standard diameter fifty millimeter connections.

Medium Capacity Frame Eight: This unit increases displacement to zero point quarter six five liters per revolution, sustaining flow rates up to twenty two thousand five hundred liters per hour with an enhanced discharge pressure capability of zero point nine megapascals.

High Capacity Frame Eleven: This large scale model features a displacement of one point two eight liters per revolution, utilizing diameter eighty millimeter connections to deliver up to forty six thousand liters per hour.

Maximum Capacity Frame Fifteen: This heavy duty unit provides a massive displacement of five point three liters per revolution. Operating at speeds between two hundred and four hundred revolutions per minute, it achieves a maximum volumetric capacity of one hundred and twenty seven thousand two hundred liters per hour while managing a maximum discharge pressure of one point five megapascals through diameter one hundred and fifty millimeter ports.

Material Selection and Engineering Configuration

Proper pump specification depends on a thorough evaluation of the fluid properties and process variables:

Wet End Metallurgy Selection: The pump casing and internal rotors are available in grade three hundred and four stainless steel for general food processing, or grade three hundred and sixteen L stainless steel for corrosive chemical or sterile pharmaceutical applications. The system accommodates dynamic fluid viscosities ranging from zero point two centipoise up to one hundred thousand centipoise.

Mechanical Sealing Face Materials: Single mechanical seals work effectively for clean fluids, while double mechanical seals with external liquid flushing protect the system when handling crystallizing or hazardous liquids. Seal faces are available in hard alloy, silicon carbide, industrial graphite, or high purity ceramics.

Elastomer Thermal Resilience Matrix: Internal O rings must withstand the process operating temperatures, which span from negative twenty to one hundred and fifty degrees Celsius, with short term sterilization thresholds reaching one hundred and eighty degrees Celsius. Elastomer options include fluoroelastomers, silicone, ethylene propylene diene monomer, and polytetrafluoroethylene.

Process Piping Integration Methods: Process piping integration is completed using sanitary quick release tri clamps, male gas threads, industrial flanges, or orbital welded connections to ensure zero leakage.