The pneumatic four-way flanged ball valve is a multi-port ball valve featuring a four-way flow passage structure, flanged end connection and pneumatic actuator drive. It is primarily used for media diversion, confluence, flow reversal and multi-channel fluid switching control in industrial piping systems.
The valve body adopts a special four-way ball core internally. Rotation of the ball core changes the communication status between different flow passages to achieve various flow direction combinations as required by the process. Equipped with a pneumatic actuator, the valve enables fast and reliable automatic reversing and flow path switching.
Working Principle of Pneumatic Four-Way Flanged Ball Valve
The pneumatic four-way flanged ball valve is driven by a pneumatic actuator. When clean compressed air is supplied to the actuator, it rotates the valve stem and four-way ball core by 90 degrees. Thanks to the special internal passage layout of the four-way ball core, rotating the ball core switches the communication state between each port to realize medium reversing, diversion or confluence. L-type and X-type flow paths are available according to selection to meet different process flow logic.
The valve can be equipped with solenoid valves, limit switches and other accessories for remote automatic control and valve position feedback. If a single-acting actuator is selected, the spring will automatically reset upon air loss to ensure process safety.
Pneumatic Shut‑off Ball Valve are 0‑90° rotary valves. They utilize pneumatic actuators to convert compressed air into rotary motion, delivering fast and reliable valve opening and closing for industrial process control.
According to specific application requirements, pneumatic ball valves can be equipped with solenoid valves, limit switches, position feedback devices, air filter‑regulators, valve positioners and other pneumatic instrument accessories to realize automatic valve control and remote monitoring functions.
Many factors shall be considered when selecting a pneumatic ball valve, including valve size, pressure rating, operating temperature, process medium, flow rate, body material, seat material, actuator type and control mode.
If you are looking for a qualified manufacturer or supplier of pneumatic ball valves, please contact our technical team and provide your operating conditions. Our valve engineers will recommend suitable pneumatic ball valves, actuators and control accessories based on your specific application requirements. （Unit: mm）
| DN | NPS | Type/Class | Part No | L | D | K | Th | n-L | C | H | d1 | f |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 0.5 | Q646-150LB | Q646150XLX05 | 150 | 90 | 60.3 | M14 | 4-16 | 9.6 | 14 | 35 | 2 |
| 20 | 0.75 | Q646-150LB | Q646150XLX075 | 150 | 100 | 69.9 | M14 | 4-16 | 11.2 | 14 | 43 | 2 |
| 25 | 1 | Q646-150LB | Q646150XLX1 | 180 | 110 | 79.4 | M14 | 4-16 | 12.7 | 16 | 51 | 2 |
| 32 | 1.25 | Q646-150LB | Q646150XLX125 | 200 | 115 | 88.9 | M14 | 4-16 | 14.3 | 19 | 64 | 2 |
| 40 | 1.5 | Q646-150LB | Q646150XLX15 | 220 | 125 | 98.4 | M14 | 4-16 | 15.9 | 21 | 73 | 2 |
| 50 | 2 | Q646-150LB | Q646150XLX2 | 240 | 150 | 120.7 | M16 | 4-18 | 17.5 | 24 | 92 | 2 |
| 65 | 2.5 | Q646-150LB | Q646150XLX25 | 260 | 180 | 139.7 | M16 | 4-18 | 20.7 | 27 | 105 | 2 |
| 80 | 3 | Q646-150LB | Q646150XLX3 | 280 | 190 | 152.4 | M16 | 4-18 | 22.3 | 29 | 127 | 2 |
| 100 | 4 | Q646-150LB | Q646150XLX4 | 320 | 230 | 190.5 | M16 | 8-18 | 22.3 | 32 | 157 | 2 |
| 125 | 5 | Q646-150LB | Q646150XLX5 | 380 | 255 | 215.9 | M20 | 8-22 | 22.3 | 35 | 186 | 2 |
| 150 | 6 | Q646-150LB | Q646150XLX6 | 440 | 280 | 241.3 | M20 | 8-22 | 23.9 | 38 | 216 | 2 |
| 200 | 8 | Q646-150LB | Q646150XLX8 | 550 | 345 | 298.5 | M20 | 8-22 | 27.0 | 43 | 270 | 2 |
| 250 | 10 | Q646-150LB | Q646150XLX10 | 670 | 405 | 362.0 | M24 | 12-26 | 28.6 | 48 | 324 | 2 |
| 300 | 12 | Q646-150LB | Q646150XLX12 | 760 | 485 | 431.8 | M24 | 12-26 | 30.2 | 54 | 381 | 2 |
| 350 | 14 | Q646-150LB | Q646150XLX14 | 850 | 535 | 476.3 | M27 | 12-30 | 33.4 | 56 | 413 | 2 |
| 400 | 16 | Q646-150LB | Q646150XLX16 | 980 | 595 | 539.8 | M27 | 16-30 | 35.0 | 62 | 470 | 2 |
| 450 | 18 | Q646-150LB | Q646150XLX18 | 1080 | 635 | 577.9 | M30 | 16-33 | 38.1 | 67 | 533 | 2 |
| 500 | 20 | Q646-150LB | Q646150XLX20 | 1080 | 700 | 635.0 | M30 | 20-33 | 41.3 | 71 | 584 | 2 |
| 15 | 0.5 | Q646-300LB | Q646300XLX05 | 150 | 95.0 | 66.7 | M14 | 4-16 | 12.7 | 21.0 | 35.1 | 1.5 |
| 20 | 0.75 | Q646-300LB | Q646300XLX075 | 150 | 115.0 | 82.6 | M16 | 4-18 | 14.3 | 24.0 | 42.9 | 1.5 |
| 25 | 1 | Q646-300LB | Q646300XLX1 | 180 | 125.0 | 88.9 | M16 | 4-18 | 15.9 | 25.0 | 50.8 | 1.5 |
| 32 | 1.25 | Q646-300LB | Q646300XLX125 | 200 | 135.0 | 98.4 | M16 | 4-18 | 17.5 | 25.0 | 63.5 | 1.5 |
| 40 | 1.5 | Q646-300LB | Q646300XLX15 | 220 | 155.0 | 114.3 | M20 | 4-22 | 19.1 | 29.0 | 73.0 | 1.5 |
| 50 | 2 | Q646-300LB | Q646300XLX2 | 240 | 165.0 | 127.0 | M16 | 8-18 | 20.7 | 32.0 | 91.9 | 1.5 |
| 65 | 2.5 | Q646-300LB | Q646300XLX25 | 260 | 190.0 | 149.2 | M20 | 8-22 | 23.9 | 37.0 | 104.6 | 1.5 |
| 80 | 3 | Q646-300LB | Q646300XLX3 | 280 | 210.0 | 168.3 | M20 | 8-22 | 27.0 | 41.0 | 127.0 | 1.5 |
| 100 | 4 | Q646-300LB | Q646300XLX4 | 320 | 255.0 | 200.0 | M20 | 8-22 | 30.2 | 46.0 | 157.2 | 1.5 |
| 125 | 5 | Q646-300LB | Q646300XLX5 | 380 | 280.0 | 235.0 | M20 | 8-22 | 33.4 | 49.0 | 185.7 | 1.5 |
| 150 | 6 | Q646-300LB | Q646300XLX6 | 440 | 320.0 | 269.9 | M20 | 12-22 | 35.0 | 51.0 | 215.9 | 1.5 |
| 200 | 8 | Q646-300LB | Q646300XLX8 | 550 | 380.0 | 330.2 | M24 | 12-26 | 39.7 | 60.0 | 269.7 | 1.5 |
| 250 | 10 | Q646-300LB | Q646300XLX10 | 670 | 445.0 | 387.4 | M27 | 16-30 | 46.1 | 65.0 | 323.8 | 1.5 |
| 300 | 12 | Q646-300LB | Q646300XLX12 | 760 | 520.0 | 450.8 | M30 | 16-33 | 49.3 | 71.0 | 381.0 | 1.5 |
| 350 | 14 | Q646-300LB | Q646300XLX14 | 850 | 585.0 | 514.4 | M30 | 20-33 | 52.4 | 75.0 | 412.8 | 1.5 |
| 400 | 16 | Q646-300LB | Q646300XLX16 | 980 | 650.0 | 571.5 | M33 | 20-36 | 55.6 | 81.0 | 469.9 | 1.5 |
| 450 | 18 | Q646-300LB | Q646300XLX18 | 1080 | 710.0 | 628.6 | M33 | 24-36 | 58.8 | 87.0 | 533.4 | 1.5 |
| 500 | 20 | Q646-300LB | Q646300XLX20 | 1080 | 775.0 | 685.8 | M33 | 24-36 | 62.0 | 94.0 | 584.2 | 1.5 |
Featuring a four-way multi-passage design for flexible flow switching, this valve adopts pneumatic actuation to achieve fast reversing response. With flanged ends suited for industrial piping and a rotating ball core for dependable operation, it provides high flow capacity and low pressure loss. It supports flexible automation accessory setup, multiple safety control options, and service for various industrial media.
