Ventilation Butterfly Valves employ a metal sealing system, suitable for operating conditions with temperatures ≤300℃ and nominal pressures 0.1MPa. They support multiple actuation methods, including manual, electric, and pneumatic, and the butterfly plate can rotate within a 90° range to control the medium. Based on the sealing method, they are classified into three types: forced sealing, pressurized sealing, and automatic sealing. Connection methods include wafer type and flange type. During installation, they must be kept horizontal, the medium flow direction must be consistent with the markings on the valve body, and they must pass strength and tightness tests. Nominal diameters cover 50-2000mm, suitable for dusty gases such as coal gas and flue gas.
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Ventilation butterfly valves Technical parameters
Size Range: DN50-DN4000
Material: WCB, Stainless Steel
Connection Options: Flanged End
Pressure: 0.05Mpa ~ 0.6Mpa
Working Temperature: -29°C to 425°C
Sealing Options: SS304 + Graphite
Applicable Medium: Gas, dust gases, flue gas
Ventilation butterfly valves Main Components Material:
| Part Name | Material |
|---|---|
| Body | Q235A, 16Mn steel, stainless steel |
| Disc | Q235A, 16Mn steel, stainless steel |
| Ring | Q235A, 16Mn steel, stainless steel |
| Stem | 2Cr13, stainless steel |
| Packing | Flexible Graphite |
Ventilation Butterfly Valve Structural Features and Performance Advantages
Compact and Lightweight Design
Utilizing a center-line butterfly plate welded with short-structure steel plates, the structure is compact, weighing only 1/3 of a gate valve of the same diameter. It requires little installation space, making it particularly suitable for high-altitude or concealed ductwork.
No internal connecting rods, bolts, or other components, reducing potential failure points and extending service life to over 100,000 cycles.
High Temperature Resistance and Wear Resistance
Soft Seal: Employs rubber or PTFE lining, providing excellent sealing performance (leakage rate ≤0.1%), but with limited temperature resistance (≤200℃), suitable for general ventilation systems.
Hard Seal: Metal-to-metal or metal-to-ceramic seal, high temperature resistance (up to 1000℃), wear resistance, leakage rate ≤0.5%, suitable for high-temperature dusty gases (such as blast furnace gas in metallurgical processes, and dust pipelines in cement plants).
Composite Seal: Combines the advantages of soft and hard seals (e.g., metal frame + PTFE coating), balancing temperature resistance and sealing performance.
Low Flow Resistance and High Energy Efficiency
When the butterfly valve is fully open, it offers minimal resistance to media flow and low pressure loss, making it particularly suitable for ventilation systems with high flow rates and low pressure differentials, thus reducing energy consumption.
Flexible Drive Methods
Manual Drive: Operated via a handle or worm gear, suitable for simple operating conditions or standby control.
Electric Drive: Supports 4-20mA signal input for remote automated adjustment; when matched with a regulating actuator, it can precisely control flow rate.
Pneumatic Drive: Fast response speed, suitable for explosion-proof or high-frequency opening and closing scenarios.
Ventilation Butterfly Valve Applications
Chemical and Building Materials Industries
Controlling the ventilation volume of reactors and adjusting the proportion of process gases.
Cement plant kiln tail flue gas emission ducts, dealing with high-temperature dust erosion.
Power and Environmental Engineering
Exhaust pipes of boiler induced draft fans in thermal power plants, adjusting the air supply volume to optimize combustion efficiency.
Dust removal systems: Dust-laden gas flow control; hard-seal structure extends valve life.
Building Ventilation Systems
Fresh air conditioning systems in large shopping malls and office buildings, balancing indoor and outdoor airflow.
Underground parking garage exhaust ducts, with rapid opening and closing to meet emergency smoke extraction needs.
Light industry and pharmaceutical sector
Cleanroom ventilation in food processing plants, using corrosion-resistant materials (such as 316L stainless steel) to meet hygiene requirements.
Gas delivery pipelines in pharmaceutical workshops, with a soft-seal structure to prevent cross-contamination.
Ventilation butterfly valves factory
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