The Teffiko progressive cavity pump is a positive‑displacement conveying equipment. It consists of an eccentric helical rotor mated with a double‑helical surface bushing (stator) to form closed cavities for medium displacement. It features stable pulsation‑free flow, low shear force, strong self‑priming capacity and broad medium compatibility. It is especially suitable for conveying high‑viscosity media, media containing hard particles, fibrous materials and shear‑sensitive substances prone to tearing. Unlike centrifugal pumps, progressive cavity pumps do not rely on high‑speed impeller agitation. The medium undergoes no violent churning or vortexing, and its original properties can be fully preserved. It is widely applied in complex conveying scenarios such as sewage and sludge, industrial slurries, food pastes and viscous chemical liquids. Meanwhile, the pump boasts a compact structure with few components, enabling easy disassembly, assembly and maintenance, even for novice operators.
The core operating structure of a progressive cavity pump comprises a single‑thread helical rotor paired with a double‑helical rubber stator. Their unique geometric configuration forms independent closed medium chambers. During operation, the motor drives the pump shaft, causing the rotor to rotate about its own axis while rolling along the inner surface of the stator, continuously generating successive sealed chambers. For each full rotation of the rotor, the medium advances by one pitch. With continuous rotor rotation, the medium is axially and evenly pushed from the suction end to the discharge end via helical propulsion. Throughout the conveying process, internal flow velocity remains low and chamber volume stays constant, free of vortices and agitation, delivering stable pressure and fundamentally preventing medium degradation and emulsification.
Important Prohibition: Progressive cavity pumps are strictly forbidden to run dry. Under dry‑running conditions, the rotor and stator lack lubrication and cooling from process medium. Friction rapidly generates high temperature, which readily scorches, cracks and ages the rubber stator. This constitutes the primary cause of equipment damage and shortened service life.
The rotor is a metallic eccentric helical shaft and the core power‑generating moving component of the equipment. Commonly used industry materials include 304 stainless steel, 316 stainless steel, hard‑chrome plating and wear‑resistant alloys to suit various corrosive and abrasive working conditions. The machining precision and surface wear resistance of the rotor directly determine pump flow stability, conveying accuracy and overall service life. Wear‑reinforced rotors are preferred for long‑term conveyance of abrasive media such as mud and hard‑particle‑laden fluids.
The stator is a rubber bushing with an internal double‑helical profile. It represents the most critical and most consumable key component of the progressive cavity pump, and also the core part enabling the pump to handle complex media. Leveraging the properties of various elastic rubber materials, progressive cavity pumps possess conveying capabilities unavailable to conventional pump types, reliably transporting high‑viscosity fluids, fluids with suspended hard particles and fibrous‑laden complex media. Different rubber materials are matched to defined working conditions:
It mainly transmits eccentric torque and connects the front drive shaft to the rear rotor, serving as the core hub for power transmission. During equipment operation, this assembly is continuously subjected to alternating loads. Wear accelerates when conveying media containing solid particles and impurities, making it a key focus for routine equipment inspection and maintenance.
The pump casing provides medium containment and sealing protection. Inlet and outlet flanges comply with standard pipe installation requirements. The drive assembly consists of a motor and a reducer, supporting fixed‑speed operation, stepless speed regulation and multi‑speed variation. Rotational speed can be flexibly adjusted to precisely control conveying flow and satisfy diverse production requirements.
Hydraulic anti‑reverse‑rotation technology is a specialized core technology addressing safety hazards caused by high‑speed rod string reverse rotation upon pump shutdown or pump seizure for progressive cavity pumps. During shutdown or pump seizure of conventional progressive cavity pumps, torsional potential energy stored within the rod string and pressure differential between tubing and casing release rapidly, triggering high‑speed reverse rotation of the rod string. Enormous instantaneous torque is generated, which may easily bend or fracture polished rods, cause rod‑string disconnection, lead to high‑speed fragmentation and ejection of belt pulleys, damage surface equipment and even result in personal safety accidents.
This technology relies on an independent hydraulic anti‑reverse‑rotation device for safe torque release without manual intervention. When the main shaft develops a reverse‑rotation tendency after shutdown, hydraulic brake caliper pistons inside the device extend automatically, pushing friction pads to clamp the brake disc, rapidly reducing system pressure and restraining reverse‑rotation speed. After brake caliper pressure subsides, the main shaft rotates slightly backward, the gear pump restarts operation and the brake caliper clamps the brake disc again. Through a flexible “clamp‑release‑cyclic braking” mode, reverse‑rotation torque of the main shaft is gradually reduced to zero to completely eliminate safety risks.
Core technical advantages: Built‑in one‑way constant‑pressure unloading mechanism, large braking torque, smooth braking and favorable heat‑dissipation performance for automatic residual‑torque release. The device adopts an independent modular structure. No modification to the main pump body is required; retrofitting can be performed directly on existing drive equipment, featuring simple operation, low reconstruction cost and superior compatibility.
1. No dry startup: Fill the pump chamber with medium before startup to achieve lubrication and cooling, and prevent thermal burnout failure of the stator.
2. Reasonable rotational‑speed control: Higher rotational speed yields greater flow rate yet accelerates wear of rotors, stators and universal joints. For abrasive‑medium conveyance, operate at a reasonable low‑speed range to extend equipment service life.
3. Periodic special‑purpose inspection: Focus on monitoring operating conditions of universal joint drive assemblies, mechanical seals and braking devices. Timely identify hazards such as wear, leakage and braking failure.
4. Shutdown maintenance and cleaning: For long‑term equipment shutdown, thoroughly flush the interior of the pump chamber to prevent medium solidification and caking that would block chambers or corrode components.
5. Timely replacement of consumable parts: Obvious drop‑offs in flow rate and pressure are mostly caused by wear and aging of rotors and stators. Replace components promptly to guarantee equipment operating accuracy.
