The Caleffi 501502A is a MAXCAL® Automatic air vent 3/4" NPT Female for Caleffi hydraulic separator systems. It is supplied as a service or field-installed component and is not a standalone separator.
Best for service replacement and field completion of existing Caleffi separator installations.
Specifications sourced from Caleffi NA technical literature, 2025 revisions.
Key Features
Low-Velocity Separation Chamber
An enlarged internal chamber drops fluid velocity so entrained air rises and heavier particulate settles, both continuously removed in service.
Blowdown Drain and Air Vent
An integral brass blowdown valve clears collected sediment and an automatic air vent discharges separated air without shutting the system down.
Technical Specifications
| Connection Size | 4" |
| Connection Type | NPT |
| Separation Functions | System accessory |
| Maximum operating pressure | 230 psi |
| Maximum air discharge pressure | 90 psi |
| Medium temperature range | -4 - 250 deg F |
| Maximum discharge rate | 9 SCFM |
| Material | brass |
| Product Family | Accessories |
| Shipping Weight | 7.0 lb |
Documentation
Design Resources
Related Products
- Caleffi NA39588 : Ball Valve 1-1/4" Female-Female
- Caleffi NA39589 : Ball Valve 3/4" Female-Female
- Caleffi F0000435 : Magnet/drywell for 2" and 2-1/2" SEP4
- Caleffi NA10778 : Bracket for 1" and 1-1/4" union 548/5495
Frequently Asked Questions
What size connection does Caleffi 501502A have?
It is supplied with 4" NPT connections. Sizing should be based on system flow rate rather than pipe size alone; other sizes in the Accessories family are listed under Related Products.
What is the warranty on Caleffi 501502A?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of purchase. ZOT Supply is an authorized Caleffi distributor.
- Product Family:
- Accessories
- Separation Functions:
- System Accessory
- Connection Type:
- NPT
- Connection Size:
- 4 inch
- ASME Code Stamped:
- No
- Max Operating Pressure:
- 230 psi
- Medium Temperature Range:
- -4 - 250 deg F
- Body Material:
- brass
- Air Discharge Rate:
- 9 SCFM
