vacuum butterfly valve Description
Vacuum butterfly valve is specially designed for vacuum systems and adopts a centerline butterfly plate structure (formed by welding short steel plates). It has the characteristics of low flow resistance, light weight and flexible installation. Its core innovations include:
Integrated stem-disk assembly: eliminates traditional bolt or pin connection, avoids the risk of leakage caused by corrosion, and significantly improves the reliability of vacuum sealing;
Multi-layer sealing technology: The valve seat is made of nitrile rubber (temperature resistance -25~80℃) or fluororubber (temperature resistance -30~150℃), with a leakage rate of ≤1.3×10^-6 Pa·L/s;
The patented packing assembly enhances the sealing of the valve body connection and maintains stable performance under vacuum pressure.
Drive mode and type
Operation type:
Manual type: Applicable to DN32-DN300, operating torque ≤10N·m, supports multi-station installation;
Pneumatic type: Compressed air drive (0.4~0.7MPa), opening and closing time ≤3 seconds, supports single/double-acting mode and emergency cut-off;
Electric type: Integrated PLC control, suitable for DN50-DN5000 ultra-large-caliber vacuum pipelines, with a pressure resistance of 1.0MPa.
Special structure:
Self-locking function: The valve plate automatically locks in the opening and closing position, can withstand 0.3MPa gas pressure, and prevents vibration displacement;
Two-way sealing design: The valve stem shaft seal adopts a compensation structure to isolate the intrusion of the outside atmosphere and ensure that the vacuum degree is ≤1.3×10^-5 Pa.
vacuum butterfly valve Specification
| Size Range | 2"~28", DN50~DN700 |
| Acting Mode | Double Acting, Spring Return (Single Acting) |
| Operating Pressure | 1.6MPa |
| Air Supply Pressure | 2.5 to 8 bar |
| Angle of Rotation | 90° ±4° |
| Actuation Time | 1~2 seconds at 8.0 Bar Air Pressure |
| Body Material | SS304, SS316, SS316L |
| Applicable Media | Control of Water, Air, Gas, Oil, Liquid |
| Application | Water & Wastewater, Ultra Pure Water, Desalination, Chemical, Textile, Pharmaceutical, Pulp & Paper |
| Optional Accessories | Namur Solenoid Valve, Limit Switch, F.R.L, Position Indicator, Manual Device |
vacuum butterfly valve
Advantages
High flow efficiency: The flow resistance coefficient is ≤0.1 in the fully open state, and the conductance is better than the valves of the same level;
Heat and corrosion resistance: The valve body material can be selected from 304/316L stainless steel (chloride ion corrosion resistant), and the fluorine-lined butterfly valve is suitable for strong acid media;
Fast response: The pneumatic type supports electromagnetic reversing valve control, and the emergency cut-off time is ≤0.5 seconds.
Applications
Semiconductor manufacturing: Vacuum coating equipment airflow control (required leakage rate ≤1×10^-6 Pa·L/s);
Pharmaceutical industry: Freeze dryer vacuum system, suitable for CIP/SIP cleaning and sterilization process;
Energy field: TRT blast furnace gas recovery system, resistant to high temperature flue gas (≤300℃);
Environmental protection engineering: Waste gas treatment pipeline to prevent particulate deposition and seal failure
Hot Tags: vacuum butterfly valve, China vacuum butterfly valve manufacturers, suppliers, factory, Single Eccentric Butterfly Valves, Concentric Butterfly Valve, Cast Iron Butterfly Valve, butterfly swing check valve, wafer lug type butterfly valve, double flange type butterfly valve