GB Swing Flange Check Valve
The GB Swing Flange Check Valve is designed according to GB/T 12238 / GB/T 13927 standards, providing reliable protection against backflow in pipeline systems and ensuring safe operation. The valve body is made of high-strength cast steel or cast iron, offering excellent pressure resistance and corrosion durability, suitable for water, steam, oil, and chemical media.
The valve features a swing-type disc design, allowing smooth opening with minimal flow resistance. It closes automatically under reverse flow conditions, preventing backflow. Valve seats are available with metal or soft sealing materials, ensuring long-term tightness. The valve can be operated manually or integrated with automated control systems, allowing easy installation and maintenance.
With its compact structure, reliable performance, and long service life, this check valve is widely used in industrial pipelines, pump outlets, and critical systems, providing an effective solution for backflow prevention and equipment protection.
Pressure Rating: PN16 – PN100
Size Range: 1/2″ – 60″ (DN 15 – DN 1500)
Working Temperature: -29°C to 425°C
Standards: GB
Materials: Carbon Steel, Stainless Steel, Alloy Steel, Special Alloys
Operation: Manual, Gear, Electric, Pneumatic
Structural Characteristics of
The valve is designed and manufactured in accordance with advanced international standards, ensuring reliable sealing performance and stable operation.
Optimized structural design with a compact layout and clean appearance, providing both functional reliability and visual consistency for industrial installations.
A flexible wedge structure is adopted. For large-diameter valves, rolling bearings are integrated to reduce operating torque and ensure smooth and easy operation.
A wide selection of body, sealing, packing, and gasket materials is available. Material combinations can be customized according to actual working pressure, temperature, and service media.
Flange dimensions and sealing face types comply with international and domestic piping standards, ensuring compatibility with various pipeline systems and meeting diverse engineering requirements.
Materials for main parts
| Name | Material | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Body / Bonnet | CF8 | CF3 | CF8M | CF3M | WCB | LCB | WC6 | WC9 | C5 |
| Wedge | CF8 | CF3 | CF8M | CF3M | WCB | LCB | WC6 | WC9 | C5 |
| Gasket | PTFE | Graphite | |||||||
| Bolt | Stainless Steel | 35CrMoA | |||||||
| Nut | Stainless Steel | 45, 35CrMoA | |||||||
Class 150LB Main Connection Dimensions
| DN | SIZE | L | D | D1 | D2 | b | f | n-Φd | H | D0 |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 1/2″ | 108 | 90 | 60.3 | 34.9 | 10 | 2 | 4-16 | 158 | 100 |
| 20 | 3/4″ | 117 | 100 | 69.9 | 42.9 | 10.9 | 2 | 4-16 | 163 | 100 |
| 25 | 1″ | 127 | 110 | 79.4 | 50.8 | 11.6 | 2 | 4-16 | 193 | 125 |
| 32 | 1-1/4″ | 140 | 115 | 88.9 | 63.5 | 13.2 | 2 | 4-16 | 250 | 160 |
| 40 | 1-1/2″ | 165 | 125 | 98.4 | 73 | 14.7 | 2 | 4-16 | 285 | 160 |
| 50 | 2″ | 178 | 150 | 120.7 | 92.1 | 16.3 | 2 | 4-19 | 325 | 180 |
| 65 | 2-1/2″ | 190 | 180 | 139.7 | 104.8 | 17.9 | 2 | 4-19 | 350 | 190 |
| 80 | 3″ | 203 | 190 | 152.4 | 127 | 19.5 | 2 | 4-19 | 380 | 200 |
| 100 | 4″ | 229 | 230 | 190.5 | 157.2 | 24.3 | 2 | 8-19 | 460 | 230 |
| 125 | 5″ | 254 | 255 | 215.9 | 185.7 | 24.3 | 2 | 8-22 | 630 | 250 |
| 150 | 6″ | 267 | 280 | 241.3 | 215.9 | 25.9 | 2 | 8-22 | 635 | 260 |
| 200 | 8″ | 292 | 345 | 298.5 | 269.9 | 29 | 2 | 8-22 | 765 | 290 |
| 250 | 10″ | 330 | 405 | 362 | 323.8 | 30.6 | 2 | 12-26 | 895 | 330 |
| 300 | 12″ | 356 | 485 | 431.8 | 381 | 32.2 | 2 | 12-26 | 1080 | 350 |
| 350 | 14″ | 381 | 535 | 476.3 | 412.8 | 35.4 | 2 | 12-29 | 1295 | 380 |
| 400 | 16″ | 406 | 595 | 539.8 | 469.9 | 37 | 2 | 16-29 | 1435 | 400 |
| 450 | 18″ | 432 | 635 | 577.9 | 533.4 | 40.1 | 2 | 16-32 | 1625 | 430 |
| 500 | 20″ | 457 | 700 | 635 | 584.2 | 43.3 | 2 | 20-32 | 1830 | 450 |
| 600 | 24″ | 508 | 815 | 749.3 | 692.2 | 48.1 | 2 | 20-35 | 2175 | 500 |
Why Choose YAYE
