The butterfly valve with the valve body using the same material processed into ring,use of electric or pneumatic drive.its application with the body temperature of the material,nominal pressure ≤0.6MPa, generally applicable to industries,metallurgy,environmental protection, such as adjusting the ventilation pipe for use in medium traffic.
Technical data
公称通径DN(mm)Nominal diameter | 100~4000 | |||||
公称压力PN(MPa)Nominal pressure | 0.05 | 0.10 | 0.25 | 0.6 | ||
试验压力 Testing pressure | 壳体Shell | 0.075 | 0.15 | 0.375 | 0.9 | |
密封Sealing | 密闭型 Closed type | 0.055 | 0.11 | 0.275 | 0.66 | |
非密闭型 No closed type | ≤1.5%泄漏量 | |||||
适用介质Suitable mediums | 煤气、含尘气体、烟道气等 Gas,dust gases,flue gas,etc. | |||||
驱动形式Driver foms | 手动、蜗轮、气动、电动传动 Manual,worm gear,pneumatic,electric transmission | |||||
Meterial of main parts
零件名称Part name | 材料名称Meterial name |
阀体Body | Q235A、16锰钢、不锈钢Q235A,16 manganese steel,stainless steel |
蝶板Butterfly board | Q235A、16锰钢、不锈钢Q235A,16 manganese steel,stainless steel |
密封圈Seal ring | Q235A、16锰钢、不锈钢Q235A,16 manganese steel,stainless steel |
阀杆Stem | 2Cr13、不锈钢2Cr13、stainless steel |
填料Padding | 柔性石墨Flexible graphite |
Flange ventilation butterfly valve: Complete Guide for Industrial Applications
The flange ventilation butterfly valve is a crucial component in industrial pipeline systems where reliable airflow regulation and cost-effective performance are essential. With its flange connection design, this valve ensures secure installation, minimal leakage, and stable operation across ventilation systems, HVAC pipelines, chemical plants, and power stations.
This article provides a comprehensive overview of the applications, precautions, testing and maintenance practices, and user guidelines for flange ventilation butterfly valves. The goal is to help engineers, procurement managers, and industrial operators make informed decisions when selecting and maintaining these valves for long-term efficiency.
A flange ventilation butterfly valve is a type of quarter-turn valve used to control airflow in ducts or pipeline systems. The valve consists of a circular disc mounted on a rotating shaft, which can be turned 0–90 degrees to regulate flow. When the disc is fully open, air passes with minimal resistance; when closed, it provides tight shutoff.
The flange connection design ensures that the valve is bolted securely between pipe flanges, offering high strength, ease of installation, and compatibility with a wide range of pipeline systems.
Secure flange-mounted connection
Lightweight structure with compact design
Corrosion-resistant materials for durability
Easy manual or automated operation
Suitable for low to medium pressure ventilation systems
Flange ventilation butterfly valves are widely used in industries where airflow control is essential. Below are the primary applications:
Used in heating, ventilation, and air conditioning pipelines.
Ensures balanced air distribution in buildings, warehouses, and cleanrooms.
Maintains airflow in chemical plants, power stations, and steel factories.
Helps regulate air pressure in large duct networks.
Commonly used in dust collection systems.
Assists in air purification, filtration, and exhaust systems.
Controls air circulation in smelting processes.
Provides stable airflow regulation in boilers and combustion systems.
Manages non-corrosive gases in controlled environments.
Enhances safety by regulating airflow to sensitive equipment.
To ensure safety and longevity, operators should follow certain precautions when installing and using flange ventilation butterfly valves.
Ensure compatibility between valve material and working medium.
Do not use the valve for corrosive gases beyond its material limits.
Avoid high-pressure applications if the valve is designed for ventilation only.
Install in pipelines free of welding slag or debris to prevent damage to the sealing surface.
Check that the flange surface is clean and flat.
Use the correct bolt torque to avoid misalignment.
Confirm that the disc rotates freely after installation.
Install in a position where the valve can be easily accessed for maintenance.
Avoid sudden full-open or full-close operations to reduce stress.
Monitor for unusual vibration or noise during operation.
Do not use excessive force when turning the handle or actuator.
Regular inspection and preventive maintenance extend the service life of flange ventilation butterfly valves.
| Inspection Item | Frequency | Notes |
|---|---|---|
| Valve body and flange | Monthly | Check for cracks, corrosion, or deformation. |
| Sealing surface | Quarterly | Inspect for wear, scratches, or leaks. |
| Operating shaft and disc | Quarterly | Ensure smooth rotation without obstruction. |
| Fasteners (bolts & nuts) | Biannually | Tighten loose bolts and replace damaged ones. |
| Actuator or handle | Biannually | Test manual or automatic control response. |
| Leakage test | Annually | Conduct airflow or pressure test to verify sealing performance. |
Clean dust and debris from the disc and shaft regularly.
Lubricate moving parts with non-corrosive grease when required.
Replace sealing gaskets or rings if leakage occurs.
Keep spare parts (seals, bolts, discs) available for quick replacement.
Schedule professional inspection for valves in critical systems.
A practical user guide ensures correct installation, operation, and long-term use.
Inspect the valve before installation to ensure no visible damage.
Align the valve with the pipeline flange accurately.
Insert bolts symmetrically and tighten them gradually in a cross pattern.
Confirm that the valve disc can rotate without obstruction.
Conduct a pressure or airflow test before system startup.
Turn the handle or actuator gradually to open or close the valve.
Adjust the disc angle to regulate airflow as required.
Use automated actuators for frequent operations to reduce manual workload.
| Common Problem | Possible Cause | Solution |
|---|---|---|
| Air leakage | Worn seal or improper bolt tightening | Replace seals, retighten bolts |
| Difficult disc rotation | Debris in shaft or bearing wear | Clean debris, lubricate, or replace bearing |
| Noise during operation | Loose bolts or excessive airflow speed | Tighten bolts, adjust flow rate |
| Handle or actuator stuck | Corrosion or improper alignment | Apply lubricant, realign installation |
Cost-Effective: Low installation and maintenance cost.
Easy Installation: Flange connection provides secure and straightforward mounting.
Reliable Performance: Ensures minimal leakage and efficient airflow control.
Durability: Resistant to corrosion and wear under ventilation conditions.
Versatility: Widely applicable in HVAC, metallurgy, chemical, and power industries.
The flange ventilation butterfly valve plays a vital role in modern ventilation and industrial systems, offering an efficient, durable, and cost-effective solution for airflow regulation. With proper installation, routine inspection, and timely maintenance, these valves can deliver long service life and reliable performance in demanding environments.
Whether for HVAC systems, industrial ventilation, or chemical processing, flange-mounted butterfly valves remain a trusted choice for engineers and operators worldwide.
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