Pneumatic Flanged Floating-Ball Valve
Flanged floating-ball valve for shutoff and opening in low- and medium-pressure pipelines.
Product overview
This pneumatic flanged floating-ball valve covers DN15~DN200 and multiple pressure classes under Chinese, US and Japanese standards. Body and seat material options suit corrosive, high-temperature and abrasive media, with a full range of automation accessories available. Flanged connections simplify disassembly and maintenance while keeping the pipeline secure and resistant to leakage.
Available with double-acting and single-acting spring-return pneumatic actuators; the single-acting version returns automatically on air loss. It supports on/off shutoff and proportional control for flow switching and regulation in chemical, water-treatment, oil and gas, and power-industry piping. Fast pneumatic operation and responsive switching suit automated production lines.
Core technology and operating parameters
| Model | Q641 |
| Nominal size | DN15~200 mm |
| Pressure | 1.6, 2.5, 4.0 (MPa); 150LB, 300LB; 10K |
| Dimensional standards | Chinese, US, Japanese standards |
| Body material | carbon steel (WCB), stainless steel (CF8, CF8M) |
| Seat material | polytetrafluoroethylene (F), polyphenylene (P), hard alloy (Y) |
| Action type | Double-acting, single-acting (spring-return) |
| Control mode | Two-position shutoff (on/off), modulating |
| Accessory options | Solenoid valve, valve positioner, limit switch, three-piece air preparation unit (FRL), manual override |
Core construction and design advantages
Flanged connections simplify disassembly and maintenance and provide a secure, leak-resistant pipeline
Fast, responsive pneumatic switching for automated production lines
Modular assembly simplifies later accessory replacement and reduces maintenance costs
Optional explosion-proof configuration for hazardous chemical, oil and gas facilities with flammable or explosive conditions
Full accessory options including solenoid valves and valve positioners
Excellent sealing with low leakage
Wear and corrosion resistance for long service life
Easy maintenance reduces operating costs
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