The Caleffi 501502A is a MAXCAL Automatic Air Vent 3/4" NPT Female. Replacement or field-installed automatic air vent for flanged Caleffi separators, where it is isolated by a NA39589 shut-off ball valve.
Supplied as an individual service or field-installed component for Caleffi hydraulic separator, HydroCal and SEP4 installations. It is not a standalone separator.
Technical Specifications
| Inlet Connection | 3/4" NPT female |
| Exhaust Connection | 3/8" straight female |
| Maximum Working Pressure | 230 psi (16 bar) |
| Maximum Discharge Pressure | 90 psi (6 bar) |
| Maximum Discharge Rate | 9 SCFM (4.5 l/s) |
| Working Temperature Range | -4 to 250 °F (-20 to 120 °C) |
| Body and Cover Material | Forged brass |
| Filter, Stem, Float, Spring | Stainless steel |
| Mechanism Seal | VITON |
| Seals | Peroxide-cured EPDM |
| Product Type | Air Vent |
Specifications on this page are taken from the Caleffi North America documents linked below. Last verified July 2026.
Documentation
Related Products
- Caleffi NA39589 : Ball Valve 3/4" Female-Female
- Caleffi 502343A : VALCAL Automatic Air Vent 1/2" NPT Male with Check Valve and Hygroscopic Cap
Frequently Asked Questions
What is the Caleffi 501502A used for?
Replacement or field-installed automatic air vent for flanged Caleffi separators, where it is isolated by a NA39589 shut-off ball valve. It is supplied as an individual service or field-installed component.
Is the Caleffi 501502A a complete separator?
No. The 501502A is an air vent that is fitted to or supplied with a Caleffi separator. It does not provide hydraulic, air, dirt or magnetic separation on its own.
- Type:
- Air Vent
- Product Line:
- Separator Accessories
- Accessory Category:
- Air Vent
- Body Material:
- Forged Brass
- Connection Type:
- NPT Female
- Connection Size:
- 3/4 inch
- ASME Code Stamped:
- No
