Product Description
FTI DB Series Sealless Centrifugal Pumps
The FTI DB Series Sealless Centrifugal Pumps are horizontal, flooded-suction magnetic-drive pumps designed for corrosive chemical transfer and circulation. Therefore, the range provides dependable fluid handling without relying on a conventional mechanical shaft seal.
Finish Thompson offers models from DB3 through DB22 in polypropylene or PVDF construction. Across the complete DB pump range, published performance extends to approximately 837 lpm of flow and 61.3 metres of head.
DB Series Magnetic-Drive Pump Design
The FTI DB pump uses two magnetic assemblies to transfer motor power through a solid containment barrier. Consequently, no rotating shaft passes through the process-liquid casing.
This sealless arrangement removes the mechanical seal and its associated leakage point. Moreover, it can reduce seal maintenance, chemical emissions and unplanned downtime when the pump is correctly selected and operated.
Key Features and Benefits
The Finish Thompson DB range provides:
- Sealless magnetic-drive construction
- Flooded-suction centrifugal operation
- Flow range from approximately 1 to 837 lpm
- Maximum head up to 61.3 metres
- Working pressure up to 6.2 bar
- Hydraulic efficiency up to 70%
- Viscosity capability above 150 cP
- Specific-gravity capability above 1.8
- Polypropylene or PVDF construction
- Neodymium magnets on every model
- Replaceable shaft and bushing
- NEMA and IEC motor compatibility
- Horizontal or selected vertical installation
- Back pull-out maintenance design
- Five-year warranty
- CE, UKCA and EAC certification
- ATEX options on suitable configurations
Together, these features allow the FTI DB Series Sealless Centrifugal Pumps to support varied chemical duties while improving containment, operating efficiency and service access.
Polypropylene and PVDF Chemical Pumps
Polypropylene DB pumps handle compatible liquids at temperatures up to approximately 82°C. Alternatively, PVDF configurations support temperatures up to approximately 104°C and provide different chemical-resistance properties.
Therefore, engineers can choose the construction according to liquid concentration, operating temperature and compatibility requirements.
However, neither thermoplastic material suits every chemical. Consequently, the complete fluid composition and operating conditions must be reviewed before selecting the pump.
Efficient Flooded-Suction Performance
The Finish Thompson magnetic-drive pump range is designed for flooded-suction installations where liquid naturally flows towards the pump inlet.
As a result, the casing remains supplied with liquid during normal operation. Moreover, the hydraulic design provides operating efficiency up to 70%, which can help reduce unnecessary motor power and lifecycle energy costs.
The selected DB Series pump should operate close to its best-efficiency region. Therefore, users should compare the system curve with the model-specific performance curve rather than selecting only by connection size.
Run-Dry Capability with Carbon Bushings
Suitable FTI DB Series Sealless Centrifugal Pumps can tolerate extended dry running when fitted with a compatible carbon bushing.
Consequently, the pump may withstand certain temporary loss-of-liquid events better than configurations that depend entirely on process-liquid lubrication.
However, run-dry capability does not remove the need for correct monitoring and operating procedures. Facilities should still minimise unnecessary dry running and verify that all selected internal materials suit the application.
DB Pump Models and Hydraulic Coverage
The range includes:
- DB3
- DB4
- DB5
- DB5.5
- DB6
- DB6H
- DB7
- DB8
- DB9
- DB10
- DB11
- DB15
- DB22
Smaller DB magnetic-drive pumps suit moderate circulation and transfer duties. Meanwhile, larger models provide substantially greater hydraulic capacity.
For example, the DB7 reaches approximately 15.8 m³/h at 2,900 RPM, whereas the complete range extends to approximately 50.2 m³/h or 837 lpm.
Therefore, each model should be selected from its individual performance curve at the required flow, head and motor speed.
Connection and Motor Configurations
Depending on the selected model, process connections may include:
- NPT threaded connections
- BSP threaded connections
- Flanged connections
- Union connections
Moreover, the close-coupled design mounts to compatible NEMA or IEC motor frames. The Easy Set outer-drive system also allows installation without dismantling the complete pump assembly.
Consequently, commissioning, motor replacement and future servicing can be more straightforward.
Back Pull-Out Pump Maintenance
The FTI DB Series Sealless Centrifugal Pumps use a back pull-out arrangement that provides access to internal components without unnecessarily disturbing the casing or connected pipework.
In addition, replaceable shafts and bushings allow technicians to renew principal wear components instead of replacing the complete pump.
As a result, planned maintenance can require less downtime and lower spare-parts expenditure.
FTI DB Series Applications in India
The sealless centrifugal pump range may support applications across India such as:
- Chemical processing
- Electroplating and anodising
- Water and wastewater treatment
- Pulp and paper operations
- Heat-exchanger circulation
- Circuit-board manufacturing
- Metal finishing
- Industrial scrubber systems
- Acid and base transfer
- Chemical dosing-system circulation
- General industrial processing
For example, a PVDF DB pump may circulate a compatible aggressive chemical in an electroplating system. Similarly, a polypropylene magnetic-drive pump may support suitable water-treatment or scrubber duties.
Selecting the Correct FTI DB Pump
Correct pump selection depends on:
- Required flow and total dynamic head
- Chemical name and concentration
- Liquid temperature
- Viscosity and specific gravity
- Available NPSH
- Construction material
- Shaft and bushing materials
- Connection standard
- Motor voltage and frequency
- Hazardous-area requirements
Therefore, users should configure the FTI DB Series Sealless Centrifugal Pumps around the complete hydraulic and chemical duty.
Otherwise, incompatible materials, inadequate inlet conditions or an incorrect operating point may reduce flow, efficiency and component life.
Why Choose Finish Thompson DB Pumps?
Finish Thompson DB pumps combine sealless containment, corrosion-resistant thermoplastic construction and efficient magnetic-drive operation.
Moreover, the broad model range supports smaller chemical systems as well as higher-capacity industrial duties. As a result, the DB Series provides a practical solution for facilities across India requiring dependable, low-maintenance and leak-resistant chemical transfer.
Product Enquiries in India
The FTI DB Series is presented through Pumps Bharat for chemical processing, electroplating, water treatment, metal finishing, scrubber circulation, pulp and paper, and general industrial chemical-transfer applications across India.
When submitting an enquiry, please provide the chemical, concentration, temperature, required flow, total head, specific gravity and connection requirements. With this information, the available DB pump models, materials and motor configurations can be evaluated against the application requirements.