The automatic air inlet valve (adductor valve) allows entrance and emissions of large quantities of air during pipe emptying or depressions in water pipelines.
These vacuum relief valves shall be normally closed by means of a spring and open automatically only when the system pressure become negative, falling to approximately 0,02 bar below atmospheric pressure.
The immediate admission of air into the system valve shall be assured by having 10% more inflow area than the inlet area of the valve, preventing then from vacuum and limiting the vacuum pressure to the one calculated for the system. The double-sealing design (metal-metal and resilient) provides a “drop-tight” shut-off.
The air inlet valve incorporates a stainless steel screen and steel hood to avoid the entry of foreign particles.
Diameters / Flange connexions :DN50-DN500
Range : PN10, PN16 et PN25
Body : Ductile Iron EN GJS-500-7
Seat: Elastomer NBR/EPDM of high durability
Upper protection: Steel with screen in stainless steel.
Bolting: Internal in stainless steel A2 / External in galvanized steel
Coating: Non-toxic epoxy for drinkable water. Internal and external 200 microns thickness
Other material and special coating available upon request
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Model 12504 is a weight-loaded vacuum valve, suitable for beverage, food, pharmaceutical and chemical industries.
Due to their high throughput rate, these vacuum valves are capable of equalising large pressure differences for short periods of time. This is necessary at a high emptying rate or with hot or cold cleaning of the tank as well.
Low-maintenance stainless steel execution. Several options are available like CIP execution, pneumatic lifting with position reply and heating device.
Typical VS/oP valves are vacuum valves / vacuum breaker with spring with flange connection. They are designed to be mounted on the storage tanks and silos, in particular with powdery materials and granules.
All moving parts are located outside.
Soupape casse-vide VS/oP
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Some other type of vacuum valves may reach your need, feel free to contact us.
Application : Protection against the vacuum for storage tanks and silos
Settings : standard from -1 mbar up to -50 mbar; alternative settings contact us