Air release valve – Müller

Mô tả

An air release valve is a device installed on pipelines to automatically release air from the systems during operation. When air accumulates inside the pipeline, it can form air bubbles or air pockets, which may reduce flow rate, cause pipe vibration, or lead to water hammer.
The air release valve helps remove air, maintain stable pressure, and protect pumps and equipment.
Construction:
– Valve body: cast iron, ductile iron, steel, stainless steel
– Valve cover
– Float
– Float seat – discharge/closing mechanism
– Air outlet orifice
– Sealing gasket: EPDM / NBR
– Connection: threaded (DN15–DN50) or flanged (DN50–DN300)
Technical specifications:
– Size range: DN15 – DN300
– Working pressure: PN10 / PN16 / PN25
– Operating temperature: 0–80°C, up to 120°C (stainless steel)
– Body material: Cast iron GG25, ductile iron GGG40, stainless steel 304/316
– Float: stainless steel 304/316
– Gasket: EPDM, NBR
– Connection type: BSPT/BSP threaded or flanged
– Media: clean water, light wastewater, fire protection systems, transmission pipelines
Key Characteristics:
– Automatic air release, no external power required
– Removes air from pipelines to improve system efficiency
– Reduces the risk of water hammer and pipe rupture
– Stable operation with minimal maintenance
– Available in double-function type, allowing both large and small air discharge in a single valve
– Ductile iron body with high strength, suitable for medium- to heavy-duty pipelines
Benefits:
– Efficient removes air
– Increases actual flow rate
– High durability, easy installation
– Reduces pipe vibration and pressure surges
Disadvantages:
– The float needs periodic cleaning if the medium contains dirty water.
– Unable to release very low-pressure air in empty pipelines (requires a special type)