Automatic operation of air vent valves is based on a float ensuring a tight seal: valve opening and closing is determined by the movement (up-down) of the float. When there is air in the valve, the force of the float weight acts on the lever which is integral with the disc, thus causing it to move down. In this situation the seat is free and allows the air to be vented out of the . As the fills with water, the air trapped in the water circuit is pushed out through the valves. As soon as all the trapped air is discharged, the water entering the tank pushes the float up. As a result, the lever causes the disc to press against the seat, thus sealing the and preventing the heat carrier fluid from flowing out. The design of this device enables air to be discharged from the automatically while it is being emptied. The operation of the check valve is based on a spring-loaded device, which is sensitive to pressure and ensures pressure-tightness by means of EPDM O-rings when there is no air vent valve.

The reliability of the air vent valves is ensured by a Series of tests carried out on 100% of products to check that the body and its components are watertight.

Automatic air vent

In forging brass

Max. working pressure: 10 bar

Max. discharge pressure: 2.5 bar

Max. working temperature: 110℃

• Technical Specification

• Company introduction

XuanAnJu company was established in 2002 and renamed to XuanAnJu HVAC Technology Co., ltd in 2017. It is specified in manufacturing various Thermostatic Radiator Valves, Radiator Valves and other brass fittings. Thermostatic Radiator Valve are mainly use in central HVAC and floor HVAC s. The product can regulate hot water flow rate to control room temperature. It has been applying widely in many key energy saving and environmental protection projects.

Our company has passed ISO9001 quality management in 2003 and got EN215 certification in 2011. It is equipped with various testing and inspecting equipments to guarantee the quality of our products. The products that produced by our company all meet the requirements of our customers.

• FAQ

Q: How long is your product guarantee period?
A: We have three-year guarantee.

Q: What is your MOQ?
A: For OEM product we have different MOQ for various product, and for ODM product we do not have MOQ because we will deliver the products from our stock in warehouse.

Q: Can you accept OEM?
A: We can do OEM but we require a certain MOQ.

Q: How long is your delivery time?
A: For the items if we have enough stocks, we can send to you immediately. For mass production, we can promise 30-45 days.​

Tag: BSP Automatic Air Vents,1/2 Inch Automatic Air Vents,2.5 bar Automatic Air Vents