कास्ट आयरन ग्लोब वाल्व

1. के उत्पादनकच्चा लोहाGभागVअल्व

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

2. Parameters of कच्चा लोहाGभागVअल्व

सीलिंग फेस

13Cr,STL, PTFE, नायलॉन, शरीर सामग्री के साथ

3. Advantages of कच्चा लोहाgभागvअल्व

1) The structure of the कच्चा लोहाgभागvअल्व is simpler than that of the gate vअल्व, and it is more convenient to manufacture and maintain.
2) सील सतहof कच्चा लोहाgभागvअल्व is not easy to wear and scratch, and the sealing performance is good. There is no relative sliding between the vअल्व disc and the sealing surface of the vअल्व 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 कच्चा लोहाgभागvअल्व is opened and closed, the disc stroke is small, so the height of the shut-off vअल्व is smaller than that of the gate vअल्व, but the structure length is longer than that of the gate vअल्व.
4) कच्चा लोहाgभागvअल्व has a large opening and closing moment, which is laborious and takes a long time.
5) The medium channel in the कच्चा लोहाgभागvअल्व 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 कच्चा लोहाgभागvअल्व PN≤16MPa, the downstream flow is generally adopted, and the medium flows upward from the bottom of the vअल्व flap; when the nominal pressure PN≥20MPa, the reverse flow is generally adopted, and the medium flows downward from the top of the vअल्व flap. In order to increase the seal performance. When in use, the shut-off vअल्व medium can only flow in one direction and cannot change the direction of flow.
7) The vअल्व flap is often eroded when the कच्चा लोहाgभागvअल्व is fully opened.

4. पूछे जाने वाले प्रश्न