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Air vent valve is an indispensable auxiliary component in pipeline system, widely used in boilers, oil and gas, water supply and drainage pipelines. Because water is usually dissolved with a certain amount of air, and the solubility of air decreases with the increase of temperature, so that in the process of water circulation, the gas gradually separates from the water, and gradually gathers together to form large bubbles or even gas columns. Because of the water supplement, there are often gas produced. The air vent valve is often installed at the commanding point or elbow to eliminate excess gas in the pipeline, improve the efficiency of pipe road use and reduce energy consumption.

25 years of experience

Zhejiang Huibo Valve Technology Co., Ltd.

Zhejiang Huibo Valve Technology Co., Ltd. is a leading Wholesale Air Vent Valve Manufacturers and Air Vent Valve Factory in the valve industry, with more than 25 years of experience, specializing in the field of HAVC system parts and brass valves. Huibo Valve has its own factory, which is located in Yuhuan County, Zhejiang Province, the hometown of brass valves in China.Now as the top manufacturer of high quality HAVC system parts and brass valve, our main products cover brass manifold, stainless steel manifold, thermostatic radiator valve, manual radiator valve,balance valve, motorized valve, air vent, ball valve, gate valve, gas valve, check valve, brass fittings and so on with more than 40 series and 2000 varieties.



Industry Knowledge Extension

The working principle of Air Vent Valve
Air vent valves, also known as air release valves or air bleed valves, are used in plumbing and heating systems to remove air trapped within the system. The working principle of an air vent valve involves the automatic release of air while preventing the escape of water or other fluids. Here's a brief explanation of how air vent valves work:
Location: Air vent valves are typically installed at high points or near the top of the system where air tends to accumulate. These high points can be found in heating systems, water distribution pipes, or other closed-loop systems where air pockets may form.
Valve Mechanism: Air vent valves consist of a body housing, a float mechanism, and a valve orifice. The float mechanism is designed to rise when it encounters air and fall when it encounters water or fluid. The valve orifice is usually equipped with a small float-controlled ball or a similar mechanism.
Air Release: As air accumulates in the system, it rises to the top and reaches the air vent valve. The float mechanism detects the presence of air and rises, opening the valve orifice. This allows the trapped air to escape from the system, as air is lighter than water or other fluids.
Water Sealing: When the air vent valve releases air, the float mechanism falls under the weight of the water or fluid, closing the valve orifice. This prevents the escape of water or fluid through the valve.
Continuous Operation: Air vent valves are designed to operate automatically and continuously. As long as there is air trapped in the system, the float mechanism will rise and open the valve orifice to release the air. Once the air is released, the float mechanism falls, closing the valve and preventing the entry of water or fluid.
Pressure and Temperature Considerations: Air vent valves are typically designed to handle specific pressure and temperature ranges. It's important to select the appropriate air vent valve for the system based on these factors to ensure proper operation and avoid any potential issues.
The working principle of air vent valves allows for the efficient removal of air from plumbing and heating systems. By eliminating air pockets, the valves help prevent airlocks, ensure proper flow, and maintain system efficiency. Regular maintenance and inspection of air vent valves are essential to ensure their effective operation and prevent any potential blockages or malfunctions.

How to Use Air Vent Valve?
Using an air vent valve is a relatively straightforward process. Here's a step-by-step guide on how to use an air vent valve in a typical plumbing or heating system:
Locate the Air Vent Valve: Identify the air vent valve in your system. It is usually positioned at a high point or near the top of the system where air tends to accumulate, such as on radiators, near boilers, or on water distribution pipes.
Prepare the System: Ensure that the system is pressurized and that the water or fluid is flowing. If the system is not pressurized or there is no flow, the air vent valve may not function properly.
Opening the Air Vent Valve: Some air vent valves have a manual screw or knob that needs to be turned counterclockwise to open the valve. Use a screwdriver or a wrench, if necessary, to rotate the knob or screw and open the valve.
Air Release: As you open the air vent valve, you may hear a hissing sound as the trapped air begins to escape. Allow the valve to remain open until the air is completely released. You may notice water or fluid spurting out initially as the air is pushed out.
Closing the Air Vent Valve: Once the air has been released and water or fluid starts to flow steadily from the valve, it's time to close the valve. Rotate the manual screw or knob clockwise to close the valve. Be careful not to overtighten the valve.
Check for Leaks: After closing the air vent valve, check the surrounding area for any leaks. Ensure that the valve is tightly closed and that there are no water or fluid leaks from the valve or the connecting pipes.
Regular Maintenance: It's important to regularly inspect and maintain the air vent valve to ensure its proper operation. Check for any signs of blockages, corrosion, or damage. Clean the valve if necessary to remove any buildup or debris that could hinder its function.
Remember, the specific steps may vary depending on the type and design of the air vent valve in your system. Always consult the manufacturer's instructions or seek professional guidance if you're unsure about the proper usage of a specific air vent valve or if you encounter any difficulties during the process.