Product details
4491/AA Castel Filter Block Suitable for Filter 4421/C Castel
The Castel 4491/AA filter block is engineered for installation inside compatible 4421/C filter drier shells. It functions as a replaceable internal filtration element that removes moisture, acids, and solid particles from the refrigerant circuit. By replacing only the filter block instead of the complete shell, maintenance becomes more efficient while maintaining system protection and performance.
Key Benefits
Designed for 4421/C filter drier shells
Removes moisture and solid contaminants
Protects compressors and expansion devices
Replaceable internal element for easy servicing
Improves overall system reliability
Specifications
Brand: Castel
Model: 4491/AA
Product Type: Filter Block
Compatibility: Suitable for 4421/C filter shells
Application: Refrigeration and air-conditioning systems
Installation: Internal replaceable element
Applications
Commercial refrigeration systems
Industrial cooling installations
Cold storage facilities
HVAC systems using replaceable core filtration
FAQs
Is this a complete filter drier:
No, this is the internal filter block only. The shell is sold separately.
Which shell is this compatible with:
It is suitable for 4421/C filter drier shells.
What does this filter block remove:
It removes moisture, acids, and solid contaminants from the refrigerant.
Is it suitable for industrial use:
Yes, it is designed for commercial and industrial refrigeration systems.






