Finish Thompson DB9P DB9 Magnetic Drive Pump end
Finish Thompson builds the DB9P as a DB9 sealless magnetic drive pump end in glass fiber reinforced polypropylene. 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.
Removing the seal removes the usual failure mode. On a conventional pump the seal is what weeps, what needs flushing and what puts the pump back on the bench, and none of that applies here. The wetted parts are glass fiber reinforced polypropylene with a carbon 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 180 degrees F.
Key Features
- Sealless magnetic drive with no shaft seal and no leak path
- Glass fiber reinforced polypropylene wetted construction
- Carbon 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: DB9P
- Series: DB9
- Type: Sealless magnetic drive centrifugal pump end
- Wetted Material: Glass fiber reinforced polypropylene
- Bushing: Carbon
- Shaft: Ceramic
- Elastomers: Viton FKM
- Maximum Working Pressure: 80 psi
- Maximum Temperature: 180 degrees F
- Motor Frame: 56C
- Condition: New
Frequently Asked Questions
Q: How is the pump serviced?
It is a back pull out design, so the wet end comes apart without disturbing the piping or unbolting the motor.
Q: What decides the maximum temperature?
The housing material and the fluid together, with polypropylene rated to 180 degrees F and PVDF to 220 degrees F, lowered by whatever is being pumped.
Q: Why choose PVDF over polypropylene?
PVDF handles oxidizers, bleach, strong acids and higher temperatures that polypropylene cannot, at a higher cost.
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.
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.
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