When the medium flows into the valve body as indicated by the arrow of the valve body, the pressure acting on the medium produces upward thrust on the valve disc. When the medium thrust is greater than the gravity of the valve disc, the check valve opens. When the force acting on the disc by the medium pressure behind the valve and the gravity of the disc itself are greater than the force acting on the disc by the pressure before the valve, the check valve closes to prevent the medium backflow.
Design and Manufacture Standards
1. Design and manufacturing standards are in accordance with: DIN3356;
2. The length of the structure is as follows: DIN3202;
3. Flange end size according to: DIN2543-2545;
4. Butt welding end size according to: DIN3239;
5. Inspection and testing according to: DIN3230.
1. Debiao lifting check valve has reasonable structure, reliable sealing, excellent performance and beautiful appearance.
2. Seal surfacing Co cemented carbide, wear resistance, corrosion resistance, good abrasion resistance, long service life;
3. Stem conditioning and surface nitriding have good anti-corrosion and anti-friction performance.
4. Double sealing, more reliable performance;
5. Stem lifting position indication is more intuitive.
6. Parts materials, flanges and butt welding dimensions can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.