Check valves, also known as non-return valves, are essential components in fluid systems designed to allow flow in one direction while preventing backflow. These valves operate automatically, relying on the pressure of the fluid to open and close. They are widely used in applications such as water supply systems, wastewater treatment, and industrial processes where backflow prevention is critical. Check valves come in various designs, including swing check, lift check, and ball check valves, each suited for specific operational conditions. Their robust construction ensures durability and reliability, making them a preferred choice for maintaining system integrity and preventing contamination. Proper selection and installation of check valves are crucial to ensure optimal performance and longevity.
| Description | Raw Material | |
| 1 | Body | Brass |
| 2 | Bonnet | Brass |
| 3 | Spring | Stainless steel |
| 4 | Core | Brass/Plastic |

| G | DN | H |
| 1/2 | 33 | 48 |
| 3/4 | 39 | 54 |
| 11/4 | 45 | 58 |
| 11/2 | 58 | 65 |
| 2 | 66 | 69 |
| 21/2 | 82 | 76 |
| 3 | 98 | 94 |
| 4 | 109 | 101 |
| Description | I Raw Material | |
| 1 | Body | Brass |
| 2 | Seal Ring | PTFE |

| G | DN | L | H |
| 1/2 | 13.5 | 45 | 50 |
| 3/4 | 16 | 48 | 53 |
| 1 | 22 | 68 | 67 |
| 1 1/4 | 27 | 72 | 78 |
| 1 1/2 | 33 | 81 | 86 |
| 2 | 43 | 93 | 102 |
| Description | Raw Material | |
| 1 | Body | Brass |
| 2 | Sleeve | Stainless Steel |
| 3 | Handle | Iron |
| 4 | Screw | Stainless Steel |

| G | L | C | Φd | ΦD |
| 5K15 | 100 | 60 | Φ12 | Φ80 |
| 5K20 | 110 | 65 | Φ12 | Φ85 |
| 5K25 | 120 | 75 | Φ12 | Φ95 |
| 5K32 | 140 | 90 | Φ15 | Φ115 |
| 5K40 | 160 | 95 | Φ15 | Φ120 |
| 16K15 | 110 | 70 | Φ15 | Φ95 |
| 16K20 | 120 | 75 | Φ15 | Φ100 |
| 16K25 | 130 | 90 | Φ19 | Φ125 |
| 16K32 | 160 | 100 | Φ19 | Φ135 |
| 16K40 | 180 | 105 | Φ19 | Φ140 |
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