Vacuum butterfly valve
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- Product Description
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Product Overview
The vacuum butterfly valve is one of the patented products independently developed by our company’s technical staff over several years. It is driven primarily by electric, pneumatic, or manual actuators. By opening and closing the vacuum valve, the cross-sectional area of the fluid passage is altered, thereby controlling the fluid flow rate and achieving precise regulation of fluid movement. The valve can be connected via flange or welding, and features a double-eccentric or triple-eccentric structural design. With its compact structure, lightweight construction, low flow resistance, and large flow area, it can be installed in multiple positions to meet the requirements of various vacuum piping systems.
Use
Vacuum butterfly valves are widely applicable to various media in production processes such as building materials, metallurgy, mining, and condensation units in air-cooled power plant systems. They are suitable for pipelines with temperatures up to 300℃ and nominal pressures ranging from 0.1 to 1.0 MPa, and are used for connecting, opening/closing, or regulating the flow of media.
Technical Performance Specifications
- Compact in structure and lightweight: The vacuum butterfly valve features a newly designed structural configuration that is compact and lightweight, making it easy to install and maintain.
- Low flow resistance, high flow rate: Its flow passage design is reasonable, featuring low flow resistance and high flow capacity, which can meet the requirements under various operating conditions and ensure smooth fluid flow in vacuum systems.
- Reliable performance and long service life: The vacuum butterfly valve has no vulnerable parts such as connecting rods or bolts, ensuring reliable operation and a long service life.
- Good sealing performance: Employing advanced sealing materials and sealing structures, this valve boasts excellent sealing performance, effectively preventing medium leakage and meeting the sealing requirements of vacuum systems. High-temperature resistance: The vacuum butterfly valve features high-temperature resistance, making it suitable for vacuum systems operating in high-temperature environments.
- Precise flow regulation and automatic trace heating function: By adjusting the opening of the valve disc, the flow rate through the valve can be precisely controlled to meet various process requirements. In response to the low-temperature conditions in the air-cooling island of air-cooled generator sets, our company has installed insulation devices and automatic temperature-limiting electric heating tapes on vacuum valves. When the temperature drops below the set point, the heating tape automatically activates to start heating; once the temperature reaches the set high point, the heating tape automatically shuts off, thereby preventing the valve’s sealing element from freezing and avoiding valve leakage or failure to open.
Main Technical Parameters
Model
YZD942X-2.5(10)C
Nominal Diameter DN (mm)
500-4000
Nominal pressure PN (MPa)
0.25–1.0
Test pressure PN (MPa)
1.5XPN
Sealing test pressure PN (MPa)
1.1XPN
Working pressure PN (MPa)
0.25–1.0
Applicable medium
Water, water vapor, air
Applicable temperature (℃)
≤150, ≤300
Leakage amount
Zero leakage
Flange Connection Dimension Standards
GB2555~2556-81
Pressure Test Standard
GB/T13927-92
Main component materials
Component Name
Material
Valve body, valve disc
QT450-10, WCB, Q235B
Valve shaft
20Cr13, 304, 316L
Sealing surface
304, 316L
Sealing ring
NBR, EPDM, fluororubber, and others
Bearing
Stainless steel self-lubricating bearing
Filler
Flexible graphite
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Company address:
No. 55, Jinjiangnan Road, Shangjie District, Zhengzhou City, Henan Province
Phone:+86-371-68122889
Email:zzsfmjt@126.com
Mobile phone:+86-13703990948
Fax:0371-68122899
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