D-040 LP | Combination Air Valve for Low Pressure
Description
The D-040 LP 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.
What is a low pressure air valve?
The low pressure air valve sealing mechanism is built with a very soft and sensitive seal. On one hand, it enables the full and effective discharge of air and, on the other hand, the air valve will close and seal tightly when water fills the valve, even if the water pressure is particularly low. Most other air valves are built so that it takes a higher minimum sealing pressure to effectively seal the valve. The A.R.I. air valve requires a minimum water pressure of just 0.2 bar to effectively seal. Low pressure air valves are designed to prevent water leaks through the discharge orifice of the air valve.
Main Features
- Working pressure range: 0.05 - 6 bar.
- Testing pressure: 10 bar.
- Maximum working temperature: 60° C.
- Maximum intermittent temperature: 90° C.
Note: For applications requiring a working temperature above the maximum stated or below 50 C., please consult first with the A.R.I. Applications Engineering Dept.
- Reliable operation reduces water hammer incidents.
- Dynamic design allows for high capacity air discharge while preventing premature closure.
- Lightweight, small dimensions, simple and reliable structure.
- The discharge outlet enables the connection of a vent/drain pipe.
- The large size of the automatic air release orifice relative to the air valve body:
- Discharges air at high flow rates.
- Lessens the danger of its obstruction by debris.
- Enables the usage of the rolling seal mechanism, making it less sensitive to pressure differentials than a direct float seal.
- The body is made of high-strength composite materials and all operating parts are made of specially selected, corrosion- resistant materials.
- Due to its light weight, the valve may be installed on plastic piping systems, as well as other lightweight piping systems.
Valve Selection
- Connection size: 1/2", 3/4”, 1”, 2"
- Available with NPT or BSPT threaded male connections.
- Optional ball valve tap: BSPT or NPT male connection.
Note
For best suitability, it is recommended to send the fluid chemical properties along with the valve request.
Upon ordering, please specify: model, size, working pressure, thread and flange standard and type of liquid.