Description
The D-025 SB is a complete package that combines the reliable and efficient properties of the A.R.I. D-025 wastewater air valve with the added feature of a sub-surface valve that can be buried below ground. A specially designed shut-off valve - situated at the base of the D-025 SB assembly allows operation from ground level. The shut-off valve is equipped with a safety mechanism enabling disconnection and removal of the D-025 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.

Main Features
• A combination air valve for wastewater, with a large air/vacuum orifice and a small automatic air release orifice, integrated into one body.
• The air valve’s inlet diameter is 3”.
• Pipe connections: 3” threaded (BSP/NPT) or flanged, in accordance with BS-10 1947, BS 4504 (DIN-2501), ASA standards.
• The D-025 SB integral, flat, quarter-turn, knife shut-off valve hasa 3” full bore passage.
• The shut-off valve is operated from the surface.
• Easy and efficient back flushing, for cleaning, can be achieved while the air valve is in its sub-surface housing.
• All connections are quick connections, to facilitate handling and maintenance operations flushing (inlet & outlet) connections and adaptor connected to the shut-off valve).
• Safety elements: Disengaging the air valve is safeguarded, unless the shut-off valve is in “closed” position, and the internal pressure is released.
• All parts are corrosion resistant: Metal parts - made of St.St.316, Composite material parts – made of Nylon, PE, PVC.
• The air valve’s body and base are made of reinforced Nylon.
• Working Pressure Range: 3-150 PSI.
• Working Temperature: 140° f Maximum instantaneous working temperature: 194° f.

Options
• Two Different installation lengths: 31.5 Inch, 39.5 Inch.
• Air valve made of Reinforced Nylon
• Addition One Way attachments (optional): One Way In, One Way Out, Slow release (Anti- Shock).

Ordering
Upon ordering, please specify: model, size, working pressure, threads/flanges standard and type of liquid.

More information:


Data sheet (400 KB)