• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.
Automatic Air Valve Sewage

Dutco Tennant LLC is a long-established supplier of valves and equipment for potable water and wastewater management in the Middle East and GCC region. For the last four decades, we have participated in numerous projects to supply potable water and wastewater products which have been designed using innovative and cutting edge technology. We supply best in class potable and sewage treatment products that help in production, distribution, and conservation of clean, drinkable water. Apart from that we also specialize in supplying equipment for wastewater collection, storage, treatment and disposal to the environment.

To meet the challenges of wastewater in the Middle East and GCC region, Dutco Tennant LLC offers latest, sewage solutions. We are experts at providing a different kind of solutions for the wastewater, sludge, and waste. If you are looking for any such solution, please allow us to provide a tailored solution to meet your exact requirements. Our product supplies include products like valves for sewage such as Gate valves, Check valves, Control valves, Butterfly valves, Air Release valves, Plug valves, Flap valves, Irrigation products, STP related materials, DI Pipes & Fittings, Pipeline Accessories, and Penstocks. Equipment such as screens, odor control units, grit removal equipment, custom made clarifiers, vortex drop pipes, sludge thickeners are some of our core STP related materials supplies. We offer products made with special design and construction to manage the corrosive and abrasive nature of the fluids.

It is important for a sewage water piping system to operate under stable condition. If air gets into sewage water transport systems it can have negative effects on the operations such as flow decrease, pressure variations, water hammer effects, and pumps going dry. Air pressure relief valve is "small orifice valves," which are usually fitted at the uppermost point on a pipeline to constantly release unwanted air from wastewater pipelines to defend against the unwanted rush and maintain system efficiency. Sewage air valves are intended to discharge trapped air from a piping system while the system is running and is under pressure. The capacity of the valve and pressure rating is dependent on the orifice’s diameter in the cover.

When the liquid is pumped through the system at startup, the initial air inside the piping is pushed into the air vent by the pressure of the flow. The float remains in the lower part of the air vent which allows the valve to remain open and continuously discharge air. The float rises with the rising liquid and closes the valve.

Automatic air valve, Air release valve, and Small orifice

Automatic air valve, Air release valve and Small orifice air valve continuously release small quantities of air when the system is pressurized. The water transmission systems usually have air inside which naturally rise and tend to accumulate at high points, the accumulated air has to be exhausted by automatic air release valves, and for air exhausting air release valve has a float and compound level mechanism enough to pull the button away from the orifice at standard internal working pressure.

Material Specification

  • Body, Cover : Ductile Iron /Cast Iron
  • Float(s) : Stainless Steel
  • Orifice balls : Stainless Steel/ ABS Plastic
  • Internal, external bolts, nuts : Stainless Steel
  • Guides, seat ring, guide ring : ABS Plastic
  • Sizes : DN50 – DN200
  • Pressure rating : PN10/16/25/PN40
  • Hydraulic Test : 1.1xPN for Seat & 1.5xPN for Body
  • Coating : Nontoxic Epoxy Internally & Externally