Teffiko screw pumps are widely used in chemical industry, sewage treatment, food slurry and other working conditions thanks to their stable conveying performance. However, even premium equipment requires standardized operation and maintenance. Proper maintenance of screw pumps directly determines service life, conveying efficiency and failure rate. Starting from the three core operational links of start‑up, operation and shutdown, this article provides clear maintenance cycles and definite answers to what oil should be filled into Teffiko screw pumps, helping users maintain the equipment and reduce unplanned downtime.
Many screw pump failures do not occur during continuous operation, but stem from non‑standard operations. To maintain a screw pump well, the first priority is to standardize the complete operating procedures for start‑up, operation and shutdown.
Note: When the bypass valve is open, the medium circulates and throttles inside the pump. Prolonged circulation will cause medium temperature rise, and in severe cases lead to high‑temperature deformation of the pump body. This risk needs close attention when operating Teffiko screw pumps.
| Cycle | Key Maintenance Points |
|---|---|
| Daily | Check gearbox oil level when the pump is stopped; replenish oil to the centre of the oil sight gauge if oil level is insufficient. Listen for abnormal noise and vibration from the pump body. Inspect leakage during pump operation (a small stable leakage is permissible for mechanical seals). |
| Weekly | For pumps shut down for more than one week, open inlet and outlet valves and jog the motor several times. Test smooth opening and closing of inlet‑outlet pipeline valves. |
| Quarterly | Check for loose foundation nuts and compression bolts of the equipment. Replace gear oil once every three months. |
| Annual |
Re‑verify coupling alignment accuracy. Test pump flow, pressure and power against nameplate parameters. If performance degrades significantly, disassemble the pump for overhaul and replace damaged parts. No disassembly is required if performance meets specifications. |
Important distinction: No additional lubricating oil is generally required for the medium‑conveying area inside the pump chamber; the conveyed medium itself provides cooling and lubrication. Lubricating grease or oil shall be filled for bearings, transmission gearboxes and mechanical seal assemblies.
1. Bearings — apply No.3 general lithium‑based grease once a month
For rolling bearings, No.3 general lithium‑based grease is recommended, to be filled once a month to ensure bearing lubrication. Avoid over‑greasing which may cause overheating.
2. Gearbox — industrial gear oil, replace according to cycles
3. Mechanical seal oil — replenish as required, replace every six months
Oil‑selection reminders
❌ Adding engine oil into the pump chamber: this will contaminate conveyed media and damage sealing components. Strictly forbidden.
❌ Delaying gear oil replacement: lubrication performance degrades substantially after oil oxidises or accumulates impurities.
❌ The more lubricating oil the better: excessively high oil level causes churning‑induced overheating; insufficient oil level results in inadequate lubrication.
❌ Continuing operation after dry‑running failure: shut down the pump immediately once dry‑running occurs, and inspect stators and seal assemblies.
The core of screw pump maintenance lies in standard start‑stop operations, periodic inspection and maintenance, as well as selecting correct oil products and performing timely oil changes. Key points for oil filling: apply No.3 lithium‑based grease to bearings monthly; replace industrial gear oil for gearboxes on schedule; maintain proper oil level for mechanical seal oil and replace it every six months. Adherence to standardized maintenance can sustain the performance advantages of Teffiko screw pumps, extend equipment service life, cut maintenance costs and guarantee stable conveying on production lines.
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