In detail
What it is made of
How it works
Swing check valve
The number that matters
Nominal pressure
16bar
The pressure class of the valve body at 20 °C. Working limits depend on the medium and its temperature.
Construction
Parts and materials
Applications
Media and industries
- Water
- Air
- Oil Products
- Water Supply
Check valve is a device in a pipeline that allows fluids or gases to flow in only one direction. When the pressure of the fluid or gas in the pipeline exceeds a certain value, the valve opens, allowing the substance to pass through. However, when the pressure drops or tries to move in the opposite direction, the valve closes, preventing backflow. Check valves are widely used in various industrial and commercial applications to ensure safety and control the flow in pipeline systems.
Dimensions of the check valve DNOVA 302A
| DN | L, mm | D, mm | D1, mm | D2, mm | B - f, mm | Z - Ød | Weight,kg |
| 50 | 200±2 | 165 | 125 | 99 | 20-2 | 4 – Ø19 | 13,00 |
| 65 | 240±2 | 185 | 145 | 118 | 20-2 | 4 – Ø19 | 17,40 |
| 80 | 260±2 | 200 | 160 | 132 | 22-2 | 8 – Ø19 | 24,40 |
| 100 | 300±2 | 220 | 180 | 156 | 24-2 | 8 – Ø19 | 33,20 |
| 125 | 350±2 | 250 | 210 | 184 | 26-2 | 8 – Ø19 | 52,00 |
| 150 | 400±2 | 285 | 240 | 211 | 26-2 | 8 – Ø23 | 75,20 |
| 200 | 500±2 | 340 | 295 | 266 | 30-2 | 12 – Ø23 | 121,00 |
Dimensional sketch of check valve DNOVA 302A, body material - cast iron GG25, closure element material - stainless steel AISI 420, seal - stainless steel
Materials of the check valve parts DNOVA 302A
| № | Part name | Material |
| 1 | Body | cast iron HT250(GG25) |
| 2 | Saddle | ZHMn58-2-2 (CuZn40Mn) / ZG2Cr13 (G-X20Cr14) |
| 3 | Gate sealing ring | ZHMn58-2-2 (CuZn40Mn) / ZG2Cr13 (G-X20Cr14) |
| 4 | Shutter | cast iron HT250(GG25) |
| 5 | Gasket | steel 35 |
| 6 | Bolt | steel 35 |
| 7 | Bracket | cast iron QT450-10 |
| 8 | Gasket | steel 08 + thermally expanded graphite |
| 9 | Cover | cast iron HT250(GG25) |
| 10 | Bolt | steel 35 |
| 11 | Cylindrical pin with female thread | steel 304 (G-X6CrNi189) |
| 12 | Flat washer | PTFE |
| 13 | screw plug | steel 25 |
Material sketch of check valve DNOVA 302A, body material - cast iron GG25, closure element material - stainless steel AISI 420, seal - stainless steel
- Body material
- Cast iron GG25/EN-GJL-250
- Maximum allowable temperature
- 392 °F / 200 °C
- Connection type
- Flanged
- Operating environment
- Water, Air, and Oil Products
- Applications
- Water Supply
- Nominal pressure
- 16 bar
- Type of seal
- Stainless steel
- Locking material
- Stainless steel AISI 420/1.4031
- Check valve type
- Swing
- Country of origin
- China
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.
Total items
Product subtotal