D-020SB | Underground Air Valve
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Description
The D-020 SB is a complete product package that combines the reliable and efficient properties of the A.R.I. D-020 combination air valve for wastewater with the added feature of a sub-surface valve that can be buried below ground. A specially designed horizontal sliding disc valve - situated at the base of the D-020 SB assembly - allows for the air valve disconnection and maintenance from ground level. This shut-off valve is equipped with a safety mechanism enabling disconnection and removal of the D-020 air valve from its sub-surface housing, even when the system is under pressure. Since service and maintenance operations of the unit are performed entirely from the surface, there is no need for safety considerations associated with confined space entry.
Product Features
- Complete product package that combines the A.R.I. D-020 combination air valve for wastewater with the added feature of a sub-surface valve that can be buried below ground.
- Underground air valve system replaces need for manholes and reduces installation costs.
- Service and maintenance operations of the unit are performed entirely from the surface, therefore, no need for safety considerations associated with confined space entry.
- Combines the features of both an air & vacuum valve and an air release valve.
- Shut-off valve is equipped with a safety mechanism enabling removal of the D-020 air valve from its sub-surface housing, even when the system is under pressure.
- Low installation costs, low maintenance costs, safe, reliable and efficient operation.
- Pipe connections: 3” threaded or flanged, in accordance with all standards.
Materials and Corrosion Protection
- Lower air valve body: Stainless Steel SAE 316 or Steel DIN St.37.
- Cover and upper air valve body: high-strength corrosion- resistant composite materials or Stainless Steel SAE 316.
- All operating parts are made of corrosion- resistant materials.
Application Range
- Working pressure range: 0.2 – 16 bar.
- Maximum operating temperature: 60°C.
- Maximum intermittent temperature: 90° C.
- Two different installation lengths:
- - 800mm tube; complete system length: 975 mm.
- - 1000mm tube; complete system length: 1175 mm.
- For underground installation on wastewater, water treatment and industrial systems in areas of frost or under roads, buildings etc.