High Capacity Automatic Air Vent | 9380N Series | FNPT Cast Iron Body | 200 PSI CWP | 125 PSI WSP
High Capacity Automatic Air Vent | 9380N Series | FNPT Cast Iron Body | 200 PSI CWP | 125 PSI WSP
9380N Series Automatic Air Vents are designed for high-capacity air removal in large hydronic systems, ensuring reliable and efficient operation of boilers, chilled water loops, and HVAC piping networks. Built with a rugged ASTM A126 Class B cast iron body and stainless steel internals, these vents deliver long-lasting performance in demanding commercial environments.
Each vent features a stainless steel float mechanism that automatically releases trapped air without manual intervention. Rated for 200 PSI CWP and 125 PSI WSP, the 9380N maintains system efficiency and prevents corrosion, cavitation, and airlock in closed-loop systems.
Key Features & Benefits
- Heavy-Duty Cast Iron Design — Constructed from ASTM A126 Class B cast iron for strength and heat resistance in hydronic applications.
- Automatic Air Release Function — Stainless steel float valve provides continuous venting performance without maintenance or manual bleeding.
- Wide Operating Range — Handles water temperatures from 32 °F to 230 °F; for service above 212 °F, use only with treated anti-boil fluids.
- Corrosion-Resistant Internals — Features stainless steel float and bolts (AISI 304, ASTM A193 B8) plus EPDM gasket for long service life.
- FNPT Threaded Connections — Available in ½″, ¾″, and 1″ FNPT sizes for easy installation in hydronic and HVAC systems.
Pressure & Temperature Ratings
| Pressure Rating | Temperature Range | Media |
|---|---|---|
| 200 PSI CWP / 125 PSI WSP | 32 °F – 230 °F | Water (with additives above 212 °F) |
Dimensions & Weight
| Size | Thread (N) | A [in] | L [in] | H [in] | Weight [lb] |
|---|---|---|---|---|---|
| ½″ | ½ - 14 NPT | 5.03 | 3.74 | 6.10 | 9.48 |
| ¾″ | ¾ - 14 NPT | 5.03 | 3.74 | 6.10 | 9.48 |
| 1″ | 1 - 11.5 NPT | 5.03 | 3.74 | 6.10 | 9.70 |
Material Construction
| # | Component | Material | Specification |
|---|---|---|---|
| 1 | Body | Cast Iron | ASTM A126 B |
| 2 | Float | Stainless Steel | ANSI 304 |
| 3 | Bolt | Stainless Steel | ASTM A193 B8 |
| 4 | Gasket | EPDM | — |
| 5 | Cover | Cast Iron | ASTM A126 B |
| 6 | Vent | Brass | ASTM B124 C37700 |
Applications: Perfect for commercial hydronic loops, boiler air elimination, chilled water lines, and high-flow radiant heating systems.