D-040LP | Combination Air Valve "BARAK"


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The D-040LP Combination Air Valve is a low pressure air valve. The 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.

The D-040 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 apipeline or piping system. This valve will open to relieve negative pressures whenever water column separation occurs.

Product Features

  • Combines the features of both an air & vacuum valve and an air release valve.
  • Triple function:
    • Air & vacuum component discharges large volumes of air during filling of the system.
    • Air & vacuum component admits large volumes of air during drainage and at water column separation.
    • The air release component releases entrapped air in pressurized systems.
  • Dynamic design allows for high velocity air discharge while preventing premature closure.
  • Innovative rolling seal mechanism.
  • Available in sizes: 1/2", 3/4", 1", 2" threaded male connections, NPT or BSPT.

Materials and Corrosion Protection

  • The body is made of high-strength composite materials.
  • All operating parts are made of specially selected, corrosion- resistant materials.

Application Range

  • Working pressure range: 0.05-6 bar.
  • Maximum operating temperature: 60°C.
  • Maximum intermittent temperature: 90° C.
  • For low pressure systems.


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Last Updated on: Thursday, 01 August 2019