An air valve is a device that automatically releases air...
Read Article >Air valves operate on a simple yet effective mechanism. Their primary role is to release trapped air or admit air into the water system, maintaining the right pressure and flow
Air valves are designed for use in water systems and are available with either a small or large orifice. Valves can also be supplied with a combination of both a small and large orifice.
Small orifice air valves automatically release accumulated air in pipelines during normal operation. Air can enter a pipeline in several ways through pump glands, leaking joints and are sometimes contained in the fluid itself.
This air accumulates at the high points of the system and may result in large pockets of air forming which seriously impedes the flow and increases pumping costs. By locating air valves at specific points in the system, ventilation of these air pockets is achieved.
Large orifice air valves allow automatic ventilation of the pipeline during filling and emptying. When filling, air is exhausted at a sufficiently high capacity to prevent restriction of the filling rate due to built up back pressure. When emptying, air is admitted to the pipeline at a rate sufficient to prevent high vacuum pressures developing
Contact one of our specialists about your specific needs. We aim to respond to your message on the same or next business day.
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Body Material |
Spheroidal Graphite Ductile Iron |
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Body Coating |
- |
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Trim |
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Pressure Range |
PN14-PN21 |
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Size Range |
DN25-DN50 |
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Flange Connection |
- |
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End Connection |
BSPF / AS4087 / AS2129 Table E&F / ANSI |
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Options |
- |
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Body Material |
Spheroidal Graphite Ductile Iron |
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Body Coating |
- |
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Trim |
Rubber - Cedar Core |
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Pressure Range |
PN14-PN21 |
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Size Range |
DN25-DN50-DN80 |
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Flange Connection |
- |
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End Connection |
BSPF / AS4087 / AS2129 Table E & F / ANSI |
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Options |
Epoxy Coating |
| Item | Details |
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Body Material |
Spheroidal Graphite Ductile Iron |
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Body Coating |
- |
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Trim |
Rubber - Cedar Core |
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Pressure Range |
PN14 |
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Size Range |
DN50 |
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Flange Connection |
BSPF |
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End Connection |
- |
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Options |
Epoxy Coating |
| Item | Details |
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Body Material |
Spheroidal Graphite Ductile Iron |
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Body Coating |
- |
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Trim |
Rubber - Cedar Core |
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Pressure Range |
PN14/PN21 |
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Size Range |
DN-50-DN80 / DN100-DN150 |
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Flange Connection |
- |
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End Connection |
AS4087 / AS2129 Table E & F / ANSI |
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Options |
- |
| Item | Details |
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Body Material |
Spheroidal Graphite Ductile Iron |
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Body Coating |
- |
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Trim |
Rubber - Cedar Core, EPDM, EPDM (PN21 on Request), EPDM (NBR on Request), Butyl, Gunmetal |
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Pressure Range |
PN14/PN21 |
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Size Range |
DN50-DN80-DN100-DN150 |
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Flange Connection |
AS4087 / AS2129 Table E & F / ANSI |
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End Connection |
- |
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Options |
Epoxy Coating |
Our commitment to industry to supply quality air valves, we have made these technical sheets available. If you need further information please make a technical enquiry.
When situated at strategic high points within the pipeline, John Valves’ air valves perform a vital function with remarkable efficiency. In their active state, these valves provide a clear passage for air to escape or enter, ensuring a stable and uninterrupted flow within the water system. This precise regulation of air optimises the flow and plays a crucial role in maintaining the desired pressure levels throughout the system.
In scenarios where the air has been appropriately vented or allowed in, the valves seamlessly return to their passive state, forming a tight seal that prevents unwanted air entry or escape.
This sealing capability is crucial for maintaining the overall efficiency and integrity of the water system, safeguarding against air-related issues such as pressure imbalances or vacuum conditions, which could otherwise lead to system inefficiencies or damages.
The durability and reliability of John Valves’ air valves are also noteworthy. These valves are engineered to endure challenging conditions, including fluctuating pressures, environmental elements, and diverse temperature ranges, which are a testament to robust construction and design.
This endurance, coupled with their crucial role in air regulation and ease of maintenance, makes John Valves’ air valves an indispensable asset in numerous applications, ranging from municipal water systems to industrial fluid management.
Discharge capacity is a pivotal feature of John Valves’ air valves, crucial for maintaining water system efficiency. It measures the volume of air an air valve can release or admit, impacting the system during filling, draining, and regular operation. Our air valves are engineered for high discharge rates, ensuring smooth system functionality by preventing back-pressure during filling and avoiding vacuum conditions during draining.
Whether a small orifice for continuous air release or a large orifice for handling high-volume airflow. They are optimised for peak performance under varying pressures and flow conditions. This adaptability not only boosts operational efficiency but also safeguards the system against pressure-related damages, extending the longevity of the pipeline network.
John Valves’ air valves deliver precise airflow management, ensuring water systems run smoothly and reliably.
John Valves’ air valves are essential in various industries and are known for their reliability and precision. These valves, from municipal water systems and wastewater treatment to agriculture and industrial processes, ensure efficient, safe fluid management. This introduction highlights how our air valves meet the unique challenges across various sectors, demonstrating their versatility and importance in enhancing operational efficacy.
Essential for managing air in city-wide water distribution networks, ensuring consistent water supply and system longevity.
Used to prevent air locks and ensure efficient wastewater processing.
Critical in agriculture for maintaining steady flow rates and preventing damage due to air entrapment.
Ideal for a variety of industries where precise fluid control is necessary, including chemical processing, mining, and paper manufacturing.
Ensures optimal performance of fire suppression systems by managing air within the pipelines.
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Read Article >If would like to know more, please get in touch and we’ll be happy to answer your questions.
A ball valve is a type of valve that uses a hollow, perforated, and pivoting ball to control the flow of fluids. It is opened when the ball’s hole is in line with the flow and closed when it is pivoted 90 degrees by the valve handle.
An air valve is used to automatically release air and gas from a pipeline system to optimize flow, prevent damage, and ensure efficient operation.
The main types include small orifice air valves for releasing small amounts of air during normal operations, large orifice air valves for handling large volumes of air during filling or draining, and combination air valves that perform both functions.
Air valves are vital for preventing air-related issues such as airlocks, pressure imbalances, and pipeline damage, ensuring smooth and efficient operation of water systems.
Yes, high-quality air valves like those from John Valves are designed to operate effectively under a range of pressures and in various environmental conditions, including corrosive or fluctuating temperature environments.
Air valves should be installed at strategic high points in the pipeline system and at critical locations where air is likely to accumulate or where vacuum conditions might occur.
The discharge capacity determines how much air the valve can release or admit within a specific time. Adequate discharge capacity is crucial for efficient system operation, preventing back-pressure buildup or vacuum conditions.
No, modern air valves are designed for easy maintenance. However, regular inspection and timely servicing are recommended to ensure optimal performance.
Absolutely; air valves are versatile and can be used in a variety of industrial applications, including chemical processing, mining, and in fire protection systems.
The selection depends on several factors, including the type of system, pressure conditions, and specific operational requirements. Consulting with valve experts like those at John Valves can help make the right choice.
Australian valve manufacturer supply high quality valves to Australian and International Customers for over 120 years.
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