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AFC Water Air Release Valve
Derwent Industries combination water potable double orifice air release valves are made in accordance with AS 4956. The valves are also available in Anti Shock.
- Features:
- Ductile Iron body and bonnet to AS 1831:500-7
- Float & Internal components: 316 Stainless Steel
- Fasteners: 316 SS
- Double Orifice prevents air pocket from occuring, improving flow efficiency of the pipeline.
- Bolts where applicable are hot melt encapsulated for superior corrosion resistance in harsh environments.
- Fusion Bonded Epoxy coated to AS/NZS 4158 provides the valve excellent corrosion protection.
- External screen provides additional protection from insects and other wild life.
- During vaccuum the float will drop allowing air flow into the pipeline.
- Air Valves are available in Anti Shock.
- The anti shock device is installed to reduce the level of air being exhausted from the valve during filling, thereby reducing the impact of water hammer on the valve.
Applications:
The Derwent Industries Double Orifice Air Release valves are for clean water application, water transmission and irrigation applications, improving flow efficiency. The addition of Anti Shock, reduces impacts of water hammer.
Downloads
| Product Code | Description |
|---|---|
SIZE RANGE: | DN 50-300mm |
ALLOWABLE OPERATING PRESSURE: | 1600 kPa; 1.6 MPa |
MAXIMUM TEMPERATURE: | -10 to 80° C |
END CONNECTION: | Flanged to AS4087 |
FLOW MEDIA: | Clean Water |
MANUFACTURED TO: | AS/NZ 4020: 2005 |
STANDARDS MARK: | SMK41377 |
FAQ
What is the AFC Water Air Release Valve?
- The AFC Water Air Release Valve from Derwent Industries is a combination potable water air valve designed in accordance with AS 4956. It features a double orifice system that automatically expels trapped air pockets during system operation and allows air intake during vacuum conditions to prevent pipeline collapse.
What types of AFC Air Valves and anti-shock mechanisms are available?
Standard Double Orifice Air Release Valves: Automatically releases air pockets to maintain full pipeline flow efficiency.
Anti-Shock Air Release Valves: Features an integrated anti-shock device that controls and reduces the rate of air exhausted while filling the pipeline, protecting the system against destructive water hammer impacts.
What are the key applications for AFC Water Air Release Valves?
AFC Water Air Release Valves are designed for clean water systems across multiple industries, including:
- Water Transmission Pipelines: Optimizing fluid transport and preventing air pockets.
- Potable Water Supply Systems: Ensuring safe, clean drinking water transport compliant with AS/NZ 4020: 2005.
- Irrigation Infrastructure: Protecting agricultural water lines from vacuum locks and surge pressures.
What materials and protective features are used in construction?
- Body & Bonnet: High-strength Ductile Iron to AS 1831:500-7
- Float & Internal Components: Grade 316 Stainless Steel for maximum corrosion resistance
- Fasteners: Grade 316 Stainless Steel, with hot melt encapsulated bolts where applicable for harsh environments
- Coating: Fusion Bonded Epoxy coated to AS/NZS 4158 for long-term corrosion protection
- Wildlife Protection: Fitted with an external screen to prevent insects and wildlife from entering the valve.
