Combination Valves | Air Valves D-060 HF NS series
The D-060 HF NS series Combination Air Valve has the features of both an air release valve and an air & vacuum valve.The air release component is designed to automatically release small pockets of air to the atmosphere as they accumulate along a pipeline or piping system when it is full and operating under pressure.
The air & vacuum component is designed to automatically discharge or admit large volumes of air during the filling or draining of a pipeline or piping system. This valve will open to relieve negative pressures whenever water column separation occurs.
- Water pipelines with anticipated conditions of surge and water hammer.
- On the peaks of water pipelines with steep slopes.
- At the points of water pipelines where water column separation occurs.
D-060-C HF - additional applications
- Water pipelines vulnerable to vandalism and/or water theft.
- Water systems found in remote areas.
D-062 HF NS and D-065 HF NS - additional applications
- Water systems with pressure demands of 25 bar and 40 bar (D-062 HF NS and D-065 HF NS respectively).
The D-060 HF NS series Combination Non Slam Air Valve is a surge dampening, slam-preventing, 3-stage combination air valve. The air valve provides high capacity vacuum protection and, at the same time, efficient surge suppression.
At sudden drainage and/or water column separation (sudden pump trips or valve closure, for instance), the air & vacuum orifice admits air at high flow rates, thus preventing vacuum.
As the water column and/or pressure wave returns, large volumes of air are discharged at high velocities, raising the non-slam disc, partially closing the air & vacuum orifice and allowing air to exhaust slowly through the smaller orifice of the non-slam disc.
This slowly exhausting air pocket dampens the slam of the returning water column, thus suppressing the pressure surge.
As the water flow arrives at a much slower rate, dampened by the slower air discharge, it buoys up the main float, gently closing the air & vacuum component of the air valve.
The S-050-C, S-052, S-015 air release component continues releasing air while the pipeline and the air valve are pressurized.
Working pressure range:
D-060 HF NS: 0.2-16 bar
D-060-C HF NS: 0.2-16 bar
D-062 HF NS: 0.2-25 bar
D-065 HF NS: 0.2-40 bar
Testing pressure for the air valve is 1.5 times its working pressure.
Maximum working temperature: 60° C.
Maximum intermittent temperature: 90° C.
All main flow cross-sections are equal or greater than the nominal port area.
Aerodynamic design enables high flow rates of air both at intake and at discharge.
Reliable operation reduces water hammer incidents.
Dynamic design allows for high velocity air discharge while preventing premature closure.
Special orifice seat design: bronze and E.P.D.M. rubber, assures long-term maintenance free operation.
Screen protected outlet.
The upper screen is protected with a protective cover.
FBE coating, both interior & exterior, according to the international standard DIN 30677-2.
Air Release Component
Body made of high strength materials.
All operating parts are made of specially selected corrosion- resistant polymer materials.
Large sized air release orifice:
Dramatically reduces the possibility of obstruction by debris.
Discharges high air flow rates.
One size orifice for a wide pressure range (up to 40 bar), achieved by: A.R.I patented rolling seal mechanism.
Size Range: 2”- 10”
2” – 8” for model D-065 HF NS only
D-060 HF NS, for 16 bar
D-060-C HF NS is vandalism protected by a cast metal air release component body, made for 16 bar
D-062 HF NS is vandalism protected by a cast metal air release component body, made for 25 bar
D-065 HF NS, made for 40 bar
These valves are manufactured with flanged ends to meet any requested standard.
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