Hydra/PowrTex part 432-644 is a replacement ferrule used in fluid connections on compatible Hydra M, Hydra Pro Super, and PowrTex 15:1 equipment. It compresses around tubing to create a leak‑tight seal when used with a fitting nut. Replacing a worn, cracked, or damaged ferrule restores leak‑free operation and prevents fluid loss or contamination.
| Part Number | 432-644 |
|---|---|
| Part Description | Ferrule |
| Brand | Hydra / PowrTex |
| Fits | Select Hydra and PowrTex 15:1 models (see long description) |
| Condition | New |
The 432-644 Ferrule is a precision component used in compression‑type tube fittings on compatible Hydra M, Hydra Pro Super, and PowrTex 15:1 equipment. When the fitting nut is tightened, the ferrule compresses onto the tubing, creating a strong, leak‑proof seal that withstands high pressure and vibration.
Over time, ferrules can become worn, cracked, or lose their grip due to repeated assembly/disassembly, thermal cycling, or overtightening. A damaged ferrule may cause leaks, pressure drops, or complete fitting failure. Replacing it with a new 432-644 ferrule restores a reliable seal and ensures safe, efficient operation of your fluid system.
| Creates leak‑tight seal | Compresses onto tubing to prevent fluid escape |
|---|---|
| Withstands pressure | Maintains seal under high operating pressures |
| Resists vibration | Holds tubing securely even with machine movement |
| Allows disassembly | Can be reused if not over‑tightened, but replacement is recommended for reliability |
| Visible damage | Cracks, splits, or deformation of the ferrule |
|---|---|
| Leakage | Fluid seeping from the fitting |
| Loss of grip | Tubing can be pulled out of the fitting |
| Overtightened | Previous over‑tightening may have work‑hardened the ferrule, reducing sealing ability |
| Disassembly | Whenever a connection is broken, replacing the ferrule ensures a fresh seal |
Part 432-644 is compatible with the following models. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Model | Component |
|---|---|
| Hydra M 2000™ 433-860 | 432-644 Ferrule |
| Hydra M 2000™ 433-861 (55 gal.) | 432-644 Ferrule |
| Hydra M 4000™ 433-800 (roofer model) | 432-644 Ferrule |
| Hydra M 4000™ 433-801 (painter model) | 432-644 Ferrule |
| Hydra M 4000™ 433-802 (55 gal.) | 432-644 Ferrule |
| Hydra Pro Super™ 433-810 | 432-644 Ferrule |
| Hydra M and Hydra Pro 2000_4000 | 432-644 Ferrule |
| PowrTex 15:1 | 432-644 Ferrule |
When replacing a ferrule, inspect these related components to ensure a complete and reliable repair.
The nut that compresses the ferrule may have damaged threads or be worn. Replace if necessary.
Inspect the tubing for scoring, kinks, or cracks. Cut back to undamaged section before installing new ferrule.
The fitting body may have worn sealing surfaces. Replace if damaged or corroded.
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