Ball Check Valve is an automatically operated valve, mainly composed of a ball, valve body and rubber seal. The ball is the only active part, which moves under the action of fluid pressure. When the fluid flows to the valve, the ball is pushed away from the valve seat, allowing the fluid to pass，and when the fluid flows in the opposite direction, the ball returns to the seat, closing the valve to prevent back flow.
Ball check valves have the advantages of compact structure, low maintenance, low cost, and the ability to handle high viscosity fluids.They are commonly utilized in applications, such as wastewater treatment, pumping stations, and various industrial processes.
▪ A ball check valve functions by means of a ball that moves up and down inside the valve. The seat is machined to fit the ball, and the chamber is conically shaped to guide the ball into the seat to seal and stop a reverse flow.
▪ Ball check valves are often preferred for use in pumping stations that are rarely attended, since they demand only limited maintenance, typically if the ball makes noise caused by insufficient pump capacity or water hammer.
▪ The ball check valves are self-cleaning, as the ball rotates during operation which eliminates the risk of impurities getting stuck on the ball.
▪ The standard ball is designed with a NBR rubber lined metal core, and the rubber hardness is optimized to prevent the ball from getting stuck in the seat.
| DN | D | D1 | D2 | L | b | f | H | Z-d | kg |
| 40 | φ150 | φ110 | φ84 | 180 | 18 | 3 | 125 | 4-φ19 | 16 |
| 50 | φ165 | φ125 | φ99 | 200 | 19 | 3 | 140 | 4-φ19 | 18 |
| 65 | φ185 | φ145 | φ118 | 240 | 19 | 3 | 150 | 4-φ19 | 20 |
| 80 | φ200 | φ160 | φ132 | 260 | 19 | 3 | 162 | 8-φ19 | 24 |
| 100 | φ220 | φ180 | φ156 | 300 | 19 | 3 | 194 | 8-φ19 | 30 |
| 125 | φ250 | φ210 | φ184 | 350 | 19 | 3 | 242 | 8-φ19 | 40 |
| 150 | φ285 | φ240 | φ211 | 400 | 19 | 3 | 277 | 8-φ23 | 52 |
| 200 | φ340 | φ295 | φ266 | 500 | 20 | 3 | 362 | 12-φ23 | 84 |
| 250 | φ400 | φ355 | φ319 | 600 | 22 | 3 | 418 | 12-φ28 | 125 |
| 300 | φ455 | φ410 | φ370 | 700 | 24.5 | 4 | 497 | 12-φ28 | – |
