Description
Hoffman 401488 Model 79 Straight Water Main Vent Valve, 1/2" x 3/4", Cast Brass
Overview:
The Hoffman 401488 (Model 79) Straight Water Main Vent Valve is designed for hot, cold, or glycol water mains in hydronic systems and process applications with specific gravity greater than 0.7. Featuring a built-in check valve and pneumatic bell for moisture discharge, this vent includes a removable top tapped for a 1/8" NPT safety drain connection. The unit has 1/2" NPT female and 3/4" male straight shank connections for straightforward installation.
Features:
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Designed for hydronic water mains in process and heating/cooling systems
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Built-in check valve for system safety
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Pneumatic bell design for effective moisture discharge
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Removable top with 1/8" NPT safety drain connection
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Durable cast brass body for long service life
Specifications:
| Specification | Details |
|---|---|
| Product Type | Main Vent Valve |
| Model | 79 |
| Part Number | 401488 |
| Application | Hot, cold, glycol water mains |
| System Type | Hydronic (Water) |
| Connection Size | 1/2" NPT Female, 3/4" Male Shank |
| Body Pattern | Straight |
| Mount | Straight |
| Type | Built-in Check |
| Adjustability | Non-Adjustable |
| Material | Cast Brass |
| Max Pressure (Hydrostatic) | 200 psig |
| Max Operating Pressure | 75 psig |
| Temperature Range (F) | 140°F - 250°F |
| Min Temperature (F) | 140°F |
| Thread Type | NPT Female, Male |
