In detail
What it is made of
How it works
Spring 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
Spring check valves are designed to prevent changes in the direction of flow of the working medium in the pipeline in the opposite direction. Operating principle: blocking the reverse flow of the medium is done by pressing the soft seal of the valve shutter to its seat under the action of a spring and the pressure of the reverse flow. The valve is opened by a pressure difference in the flow of the medium in the desired direction, while the valve shutter moves, compressing the spring.
Weight and dimensional parameters of check valves DNOVA 402A 16 bar body material - cast iron GGG50, flanged
| DN | L | D | D1 | D2 | b - f | Z - Ød | Weight, kg |
| 50 | 150 | 165 | 125 | 100 | 19 - 3 | 4 – Ø19 | 6.4 |
| 65 | 170 | 185 | 145 | 120 | 19 - 3 | 4 – Ø19 | 8.8 |
| 80 | 180 | 200 | 160 | 135 | 19 - 3 | 8 – Ø19 | 11.9 |
| 100 | 190 | 220 | 180 | 155 | 21 - 3 | 8 – Ø19 | 15.4 |
| 125 | 200 | 250 | 210 | 185 | 22 - 3 | 8 – Ø19 | 22.2 |
| 150 | 210 | 285 | 240 | 210 | 22 - 3 | 8 – Ø23 | 31.6 |
Sketch overall and installation dimensions of check valves DNOVA 402A 16 bar body material - cast iron GGG50, flanged
Materials of check valve parts DNOVA 402A 16 bar body material - cast iron GGG50, flanged
| № | Name | Material |
| 1 | Case | cast iron GGG40 |
| 2 | Disk | cast iron GGG40 |
| 3 | Sealing | NBR |
| 4 | Stem | cast iron GGG40 |
| 5 | Gasket | NBR |
| 6 | Spring | steel SS304 |
| 7 | Guide bushing | PTFE |
Check valves detail DNOVA 402A 16 bar body material - cast iron GGG50, flanged
- Body material
- Cast iron GGG50/EN-GJS-500-7
- Maximum allowable temperature
- 80 °C
- Connection type
- Flanged
- Operating environment
- Water, Air, and Oil Products
- Applications
- Water Supply
- Nominal pressure
- 16 bar
- Type of seal
- NBR
- Check valve type
- Spring
- 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