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Q641F Pneumatic Flange Ball Valve Overview
Q641F pneumatic flange ball valve is an automated control valve powered by compressed air, which is composed of a flange connected ball valve body and a pneumatic actuator. The valve is driven by an actuator to rotate the valve stem and the ball 90 degrees, achieving rapid opening and closing. The valve body is usually made of cast steel or stainless steel, and the sealing pair is mostly made of soft materials such as polytetrafluoroethylene (PTFE) to ensure reliable sealing. This valve can be activated by receiving pneumatic signals (usually 4-20mA or switch signals) from the control system, and is suitable for situations that require quick cut-off, remote control, or frequent operation. It is widely used in fluid pipeline systems of petroleum, chemical, power, light industry, and automation production lines to achieve automatic control of water, steam, oil products, and general corrosive media.

Q641F Pneumatic Flange Ball Valve Product Image
Q641F Pneumatic Flange Ball Valve Features
1. Pneumatic Drive Rapid Response: Using single or double acting pneumatic actuators, the action is rapid, the opening and closing time is short (usually only a few seconds), the response is sensitive, and it is suitable for control circuits that require rapid cutting off or process automation.
2. Multiple control and accessory options: can be equipped with pneumatic triple components (filter, pressure reducing valve, oil mist device), solenoid valve, limit switch, locator and other accessories, easily achieving remote control, switch signal feedback and precise proportional adjustment, with high integration.
3. Compact structure and high reliability: The actuator and valve are installed in a direct connection or bracket style, with a compact and sturdy structure. When the gas source is lost, the single acting spring reset type can automatically return to the open or closed state to ensure system safety.
4. Excellent sealing and universal performance: The ball and PTFE valve seat form a tight soft seal, with a high leakage level. Valves combine the stability of flange connections with the convenience of pneumatic control, making them suitable for various medium and low pressure conditions.
5. Easy maintenance and high safety: Modular design facilitates separate maintenance of the actuator and valve body. Valves usually have fire-resistant and anti-static designs, with anti blowing structures for the valve stem, and can be safely used in flammable and explosive environments.

Q641F Pneumatic Flange Ball Valve Structure Diagram
Parts Name Material List
| 序 号NO. | 名称Name | 材料Material |
| 1 | 阀体Body | 碳钢Carbon steel |
| 2 | 球体Ball | 20cr13 |
| 3 | 密封圈sealing ring | 聚四氟乙烯PTFE |
| 4 | 填料packing | 聚四氟乙烯PTFE |
| 5 | 阀杆Stem | 20cr13 |
| 性能规范表Performance Specification | ||
| 公称压力Nominal Pressure | 1.6/2.5/4 | Mpa |
| 强度试验压力Shell Test | 2.4/3.75/6 | |
| 密封试验压力Seal Test | 1.76/2.75/4.4 | |
| 适用温度Suitable Temp. | ≤200 | ℃ |
Dimensions Standard Requirements
1. The structural length of the valve shall conform to the standard GB/T 12221.
2. The connecting flange shall conform to the standard GB/T 9113.

Q641F Pneumatic Flange Ball Valve View Drawing
Q641F Pneumatic Flange Ball Valve Dimensions Table
| 型号Model | 尺寸Size | 公称尺寸DN | ||||||||||
| 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | ||
| Q641F-16C | L | 140 | 160 | 165 | 180 | 200 | 220 | 250 | 280 | 320 | 360 | 457 |
| D | 105 | 115 | 140 | 150 | 165 | 185 | 200 | 220 | 250 | 285 | 340 | |
| H | 252 | 265 | 268 | 282 | 289 | 364 | 462 | 477 | 575 | 614 | 708 | |
| Q641F-25 | L | 140 | 160 | 165 | 180 | 200 | 220 | 250 | 280 | 320 | 360 | 457 |
| D | 105 | 115 | 140 | 150 | 165 | 185 | 200 | 235 | 270 | 300 | 360 | |
| H | 252 | 265 | 268 | 282 | 289 | 364 | 462 | 477 | 575 | 614 | 708 | |
| Q641F-40 | L | 152 | 165 | 178 | 190 | 216 | 241 | 283 | 305 | 380 | 403 | 502 |
| D | 105 | 115 | 140 | 150 | 165 | 185 | 200 | 235 | 270 | 300 | 375 | |
| H | 252 | 265 | 268 | 282 | 289 | 364 | 462 | 477 | 575 | 614 | 708 | |

Model:
VQ947F-16C/VQ947F-25C/VQ947F-40C/VQ947F-16P/VQ947F-25P/VQ947F-40P/VQ947F-16R/VQ947F-25R/VQ947F-40RSpecification:
DN25-DN400Pressure:
PN16、PN25、PN40Material:
Cast Steel,Stainless Steel,Duplex Stainless Steel
Model:
Q41H-25C/Q41H-40C/Q41H-25P/Q41H-40PSpecification:
DN15-DN200Pressure:
2.5-4.0MpaMaterial:
forged steel, forged stainless steel
Model:
Q347HSpecification:
DN25-DN1200Pressure:
1.6-32MpaMaterial:
cast steel, stainless steel,alloy steel,Aluminum Nickel Bronze