Finish Thompson DB9V-T DB9 Magnetic Drive Pump end
The DB9V-T is a Finish Thompson DB9 sealless magnetic drive pump end built in carbon fiber reinforced PVDF. It is supplied as the pump end, ready to mount on a motor of the matching frame. There is no mechanical shaft seal anywhere in the design: the motor turns an outer magnet, and the field couples through a solid containment barrier to the magnet inside the impeller, so the only way out for the pumped fluid is the discharge port.
The absence of a seal is the whole point. It takes away the component that leaks, the flush water that goes with it and the seal spares that sit on the shelf waiting for the next failure. The wetted parts are carbon fiber reinforced PVDF with a PTFE bushing and a ceramic shaft, and the elastomers are Viton FKM. The unit is set up for a NEMA 56C motor frame. Maximum working pressure for this size is 80 psi, with the housing material setting the temperature ceiling at 220 degrees F.
Key Features
- Sealless magnetic drive with no shaft seal and no leak path
- Carbon fiber reinforced PVDF wetted construction
- PTFE bushing on a ceramic shaft
- Neodymium magnets for full torque in a compact coupling
- Back pull out design so the wet end is serviced without disturbing the piping
Applications
- Acid, caustic and solvent transfer where a leak cannot be tolerated
- Plating, etching, anodizing and metal finishing lines
- Water treatment, scrubber and filtration recirculation
- Laboratory, photo processing and chemical blending systems
- Replacing a sealed pump that keeps failing at the shaft seal
Specifications
- Brand: Finish Thompson
- Model: DB9V-T
- Series: DB9
- Type: Sealless magnetic drive centrifugal pump end
- Wetted Material: Carbon fiber reinforced PVDF
- Bushing: PTFE
- Shaft: Ceramic
- Elastomers: Viton FKM
- Maximum Working Pressure: 80 psi
- Maximum Temperature: 220 degrees F
- Motor Frame: 56C
- Condition: New
Frequently Asked Questions
Q: Is a strainer recommended on the suction?
It is worth fitting wherever solids are possible, since the clearances inside a magnetic drive wet end are small.
Q: Does a sealless pump still need a bushing check?
Yes. The bushing and the ceramic shaft are the only wearing parts in the wet end, and they set how long the pump runs before it needs attention.
Q: Can this pump be run dry?
Only briefly, and only with a carbon bushing fitted. Sustained dry running overheats the bushing and can damage the barrier.
Q: What happens if the discharge valve is closed while it runs?
The magnets decouple rather than the motor stalling, which protects the drive but generates heat that can weaken the magnet set.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct pump end before you order.
CLRMarine
