These valves are essential for handling liquid nitrogen and other liquefied gases. They allow for precise control of fluid flow through the pipeline using high-sensitivity surfaces that detect small pressure changes. Compared to other types, they are efficient, require no special tools for installation, and provide a hazardous-free environment when used correctly.
Check valves are high-sensitivity components that open and close based on the flow of line fluid. The interior disc enables forward flow, allowing the valve to open seamlessly. As the forward flow diminishes or reverses, the disc automatically shuts the valve to prevent backflow.
Primary components include the Body, Body Seats, Gasket, Cover Plate, Hinge, Nuts, and Washers. Depending on the specific design, other components like stems, springs, and bearings may be included to enhance performance.
| Nominal size (DN) | 10 | 20 | 32 | 40 | 50 |
|---|---|---|---|---|---|
| Dimension code | 100 | 200 | 320 | 400 | 500 |
| Face-to-face (FF) | 60 | 85 | 115 | 140 | 160 |
| Height (H) | 71 | 72 | 87 | 95 | 95 |
| Union thread (GW) | M26x1.5 | M40x2.0 | M55x2.0 | M65x2.0 | M78x2.0 |
| Weight (kg) | 0.7 | 1.3 | 2.4 | 3.9 | 5.7 |
| Kvs-Value (m³/h) | 2.2 | 6.7 | 12.1 | 22.6 | 37.1 |