Pneumatic Ventilation Butterfly Valve

A Pneumatic Ventilation Butterfly Valve is a quarter-turn flow control component that utilizes compressed air as its driving force,specifically engineered for the rapid regulation,isolation,and throttling of low-pressure gaseous media in ventilation,dust removal,and environmental protection systems.Equipped with a pneumatic actuator,it offers exceptional responsiveness,making it ideal for applications requiring frequent on/off switching or proportional control in automated workflows.

Key Design Features

Pneumatic Actuator Options:Available as single-acting(spring-return)or double-acting actuators,providing reliable on-demand operation with air pressures typically ranging from 0.4 to 0.6 MPa.

Robust Valve Body:Constructed from high-quality carbon steel or stainless steel plates,ensuring structural rigidity and resistance to thermal deformation and corrosion.

Centerline/Eccentric Disc:Precision-machined disc options minimize flow resistance and wear,with eccentric designs offering superior sealing performance for tight shutoff requirements.

Low-Maintenance Operation:Features a non-lubricated design with a minimal number of moving parts,reducing downtime and operational costs.

Flexible Installation:Bi-directional flow capability allows for horizontal,vertical,or angled mounting without compromising performance.

Integral Positioner:Optional digital positioner enables precise proportional control(0-90°rotation)for modulating airflow,ensuring accuracy within±1%.

Technical Specifications

Size Range:DN50(2")to DN4000(160")

Pressure Rating:PN0.05~PN0.6 MPa(suitable for low-pressure ventilation systems)

Temperature Range:-20°C to 600°C(varies by seal material:EPDM,NBR,silicone,or metal)

Actuator Air Supply:0.4~0.6 MPa compressed air

Actuator Type:Single-acting(spring return)or double-acting

Connection Types:Wafer type(clamped between flanges)or lug type(bolted through body)

Leakage Grade:≤1%for standard ventilation applications;metal-sealed versions available for zero-leakage critical services

Materials of Construction:

Body:Carbon steel(WCB),stainless steel(CF8/CF8M)

Disc:Carbon steel,stainless steel,or aluminum alloy

Seal:EPDM,NBR,silicone,PTFE,or metal

Main Applications

Widely deployed across industries for pneumatic control of gaseous media:

Industrial Ventilation:Dust extraction systems,fume removal,and general air handling in manufacturing plants.

Environmental Engineering:Flue gas desulfurization,scrubbers,and emissions control systems.

Power Generation:Boiler draft systems,induced draft fans,and cooling air pipelines.

Metallurgy&Mining:Blast furnace gas systems,sintering plants,and ore processing ventilation.

HVAC&Building Services:Large-scale air conditioning,exhaust systems,and cleanroom environments.