The Pneumatic PTFE-Lined Bellows-Sealed Control Valve combines two key performance advantages: full fluoropolymer lining for superior corrosion resistance and a bellows-sealed valve stem for near-zero external leakage. The valve consists of a multi-spring pneumatic diaphragm actuator and a straight-through, single-seat PTFE-lined valve body, providing reliable and precise automatic control for highly corrosive process media.
All wetted flow-path surfaces are fully lined with fluoropolymer materials, effectively isolating the valve body from corrosive fluids and extending service life in aggressive chemical environments. The valve stem is protected by a PTFE bellows sealing assembly, creating a reliable barrier against external leakage and preventing hazardous media from escaping through the stem sealing area.
Designed specifically for demanding applications involving strong acids, strong alkalis, toxic and volatile chemicals, this corrosion-resistant pneumatic control valve provides precise flow regulation while minimizing the risk of fugitive emissions, chemical leakage and environmental contamination. It is an ideal solution for chemical processing, pharmaceutical manufacturing, fine chemical production and other critical corrosive-fluid control applications.
Control valves are used for precise regulation of pipeline flow, pressure, temperature and other process parameters. To ensure correct valve selection and optimal performance, please provide detailed technical data before placing an order. Non-standard sizes and customized designs can be manufactured according to customer requirements.（Unit: mm）
| DN | NPS | Type/Class | Part No | L | H | H2 | D | K | d1 | n-L | A | Plug size | Rated CV | Storke |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 0.5 | XJHPFBZ-150LB | XLXVBZ150F05 | 135 | 190 | 510 | 90.0 | 60.3 | 35.1 | 4-16 | 290 | 8-15 | 0.01-4 | 16 |
| 20 | 0.75 | XJHPFBZ-150LB | XLXVBZ150F075 | 155 | 190 | 515 | 100.0 | 69.9 | 42.9 | 4-16 | 290 | 20 | 6.3 | 16 |
| 25 | 1 | XJHPFBZ-150LB | XLXVBZ150F1 | 160 | 190 | 530 | 110.0 | 79.4 | 50.8 | 4-16 | 290 | 25 | 10 | 16 |
| 32 | 1.25 | XJHPFBZ-150LB | XLXVBZ150F125 | 182 | 200 | 570 | 115.0 | 88.9 | 63.5 | 4-16 | 290 | 32 | 17 | 16 |
| 40 | 1.5 | XJHPFBZ-150LB | XLXVBZ150F15 | 202 | 205 | 575 | 125.0 | 98.4 | 73.0 | 4-16 | 290 | 40 | 24 | 25 |
| 50 | 2 | XJHPFBZ-150LB | XLXVBZ150F2 | 235 | 230 | 720 | 150.0 | 120.7 | 91.9 | 4-18 | 290 | 50 | 44 | 25 |
| 65 | 2.5 | XJHPFBZ-150LB | XLXVBZ150F25 | 290 | 310 | 730 | 180.0 | 139.7 | 104.6 | 4-18 | 365 | 65 | 68 | 40 |
| 80 | 3 | XJHPFBZ-150LB | XLXVBZ150F3 | 310 | 320 | 770 | 190.0 | 152.4 | 127.0 | 4-18 | 365 | 80 | 99 | 40 |
| 100 | 4 | XJHPFBZ-150LB | XLXVBZ150F4 | 350 | 340 | 1025 | 230.0 | 190.5 | 157.2 | 8-18 | 365 | 100 | 175 | 40 |
| 125 | 5 | XJHPFBZ-150LB | XLXVBZ150F5 | 400 | 380 | 1045 | 255.0 | 215.9 | 185.7 | 8-22 | 470 | 125 | 275 | 60 |
| 150 | 6 | XJHPFBZ-150LB | XLXVBZ150F6 | 485 | 400 | 1165 | 280.0 | 241.3 | 215.9 | 8-22 | 470 | 150 | 360 | 60 |
| 200 | 8 | XJHPFBZ-150LB | XLXVBZ150F8 | 600 | / | / | 345.0 | 298.5 | 269.7 | 8-22 | 470 | 200 | 640 | 60 |
| 250 | 10 | XJHPFBZ-150LB | XLXVBZ150F10 | 650 | / | / | 405.0 | 362.0 | 323.8 | 12-26 | 597 | 250 | 900 | 100 |
| 300 | 12 | XJHPFBZ-150LB | XLXVBZ150F12 | 787 | / | / | 485.0 | 431.8 | 381.0 | 12-26 | 597 | 300 | 1440 | 100 |
Key Advantages of Pneumatic PTFE-Lined Bellows-Sealed Control Valve
Exceptional Corrosion Resistance：The valve is designed to withstand a wide range of highly corrosive acids, alkalis and oxidizing media, including aqua regia, concentrated nitric acid, hydrochloric acid, sulfuric acid, hydrofluoric acid, caustic soda, various salt solutions and organic solvents. The full fluoropolymer lining provides reliable protection in aggressive chemical environments where conventional stainless-steel valves may not provide sufficient corrosion resistance.
Near-Zero External Stem Leakage：The PTFE bellows-sealed stem design creates a reliable barrier between the process medium and the atmosphere, effectively preventing the escape of toxic, volatile, VOC-containing and corrosive media through the valve stem. This design helps meet stringent environmental protection, fugitive emission and hazardous chemical handling requirements.
Dual-Layer Sealing Protection：The combination of PTFE bellows sealing and secondary PTFE packing provides two levels of stem sealing protection. This redundant sealing arrangement significantly reduces the risk of unexpected external leakage and enhances overall process safety, environmental protection and operational reliability in critical corrosive-fluid applications.
