కాస్ట్ ఐరన్ గ్లోబ్ వాల్వ్

1. పరిచయంకాస్ట్ ఐరన్Gలోబ్Vఅల్వ్

కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is a forced-sealing vఅల్వ్, so when the vఅల్వ్ is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the vఅల్వ్ from below the disc, the resistance that the operating force needs to overcome is the friction force of the vఅల్వ్ stem and packing and the thrust generated by the pressure of the medium. The force to close the vఅల్వ్ is greater than the force to open the vఅల్వ్, so కాస్ట్ ఐరన్The diameter of the vఅల్వ్ stem of the gలోబ్vఅల్వ్ should be large, otherwise the vఅల్వ్ stem will bend up failure.

2. Parameters of కాస్ట్ ఐరన్Gలోబ్Vఅల్వ్

సీలింగ్ ముఖం

13Cr,STL, PTFE, నైలాన్, బాడీ మెటీరియల్‌తో

3. Advantages of కాస్ట్ ఐరన్gలోబ్vఅల్వ్

1) The structure of the కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is simpler than that of the gate vఅల్వ్, and it is more convenient to manufacture and maintain.
2) సీలింగ్ ఉపరితలంof కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is not easy to wear and scratch, and the sealing performance is good. There is no relative sliding between the vఅల్వ్ disc and the sealing surface of the vఅల్వ్ body when opening and closing, so neither abrasion nor abrasion is serious. The sealing performance is good and the service life is long. .
3) When the కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is opened and closed, the disc stroke is small, so the height of the shut-off vఅల్వ్ is smaller than that of the gate vఅల్వ్, but the structure length is longer than that of the gate vఅల్వ్.
4) కాస్ట్ ఐరన్gలోబ్vఅల్వ్ has a large opening and closing moment, which is laborious and takes a long time.
5) The medium channel in the కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is tortuous, the fluid resistance is large, and the power consumption is large.
6) When the nominal pressure of the medium flow direction of the కాస్ట్ ఐరన్gలోబ్vఅల్వ్ PN≤16MPa, the downstream flow is generally adopted, and the medium flows upward from the bottom of the vఅల్వ్ flap; when the nominal pressure PN≥20MPa, the reverse flow is generally adopted, and the medium flows downward from the top of the vఅల్వ్ flap. In order to increase the seal performance. When in use, the shut-off vఅల్వ్ medium can only flow in one direction and cannot change the direction of flow.
7) The vఅల్వ్ flap is often eroded when the కాస్ట్ ఐరన్gలోబ్vఅల్వ్ is fully opened.

4. తరచుగా అడిగే ప్రశ్నలు