1. Pressure tested according to ISO5208 standard
2. Material: Brass (CW617N)
3. Disc: Brass disc with silicon rubber seals or ABS disc with NBR seals
4. Size: 1/2''-2"
5. Thread standard: ISO7/1, ISO228, NPT, DIN2999
6. Packaging details: Each valve comes in a polybag, packed in an inner box, and shipped in cartons on wooden pallets.
Technical Specification:
| Working Pressure | 1.6 Mpa |
| Tested Pressure | 2.0 Mpa |
| Working Medium | Water, non-corrosive liquids (not including oil), and saturated steam |
| Working Temperature | -20°C ≤ T ≤ 150°C |
Function:
A check valve is an automatic valve designed to prevent backflow of the medium, protect pumps and motors from reverse rotation, and release media from containers. It can also be used in pipelines where pressure may exceed system limits as a safety measure.
Classification:
Check valves are categorized based on their structure and installation methods. Common types include swing check valves and lift check valves.
Swing check valves have a disc that rotates around the seat axis. They are suitable for low flow rates and large diameters but not for pulsating flows. They come in single-disc, double-disc, or multi-disc designs depending on the size.
Lift check valves use a disc that moves vertically. They are typically installed in horizontal pipelines and are similar in design to globe valves. Their flow resistance is higher than swing types, but they offer better sealing performance in certain applications.
In general, check valves are essential in systems where preventing backflow is critical. They are also known as one-way valves, non-return valves, or reflux valves.
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