Slow-Closing Combination Air Valve
Product Overview
Applicable Media: Water, oil, gas, etc.
Temperature Range: -20℃ to 120℃
Pressure Rating: PN1.0 to 1.6 MPa
Size Range: DN25 to DN300
Connection Standards: GB, DIN, ISO, BS
Valve Body Lifespan: 50 years
Valve Body Materials: Cast Iron, Ductile Iron
Bonnet Materials: Cast Iron, Ductile Iron
Ball Material: Stainless Steel
Stem Material: Stainless Steel
Features and Benefits
Two-Stage Automatic Exhaust: Automatically divides the low-pressure exhaust process into two stages: full-speed exhaust at low pressure differentials and restricted exhaust at higher pressure differentials. This design eliminates pressure surges caused by rapid exhaust, protecting the system from water hammer effects.
Suitable for Various Conditions: Ideal for pipelines prone to water column separation, large-diameter long-distance water transmission pipelines, main pipelines with rapid filling, and deep well pumps. Effectively prevents water hammer impacts on the pipeline system.
Combination Air Valve
Product Overview
Applicable Media: Water, oil, gas, etc.
Temperature Range: -20℃ to 120℃
Pressure Rating: PN1.0 to 1.6 MPa
Size Range: DN25 to DN300
Connection Standards: GB, DIN, ISO, BS
Valve Body Lifespan: 50 years
Valve Body Materials: Cast Iron, Ductile Iron
Bonnet Materials: Cast Iron, Ductile Iron
Ball Material: Stainless Steel
Stem Material: Stainless Steel
Features and Benefits
Stable exhaust process prevents pressure fluctuations or other destructive phenomena.
Automatically releases air during pipeline filling and opens to intake air during pipeline draining or negative pressure conditions, such as water column separation, to eliminate negative pressure.
High-speed airflow, even mixed with water mist, will not cause the exhaust port to close prematurely, leading to air tightness. The exhaust port only closes after the air is completely discharged.
Whenever the system pressure is lower than atmospheric pressure, the air valve immediately opens to intake air into the system, preventing negative pressure. Additionally, timely air intake during system drainage accelerates the emptying process.
Simple and reliable structure with a free-floating ball design, minimal internal components, and low failure rate.
Anti-freeze design, especially suitable for use in cold regions.
Equipped with a detection mechanism to easily determine whether the valve is malfunctioning, facilitating online detection and maintenance.
