আয়রন গ্লোব ভালভ Castালুন

1. সূচনাঢালাই লোহাGলবVআলভ

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

2. Parameters of ঢালাই লোহাGলবVআলভ

সিলিং ফেস

13 সিআর,এসটিএল, পিটিএফই, নাইলন, দেহ উপাদান সহ

3. Advantages of ঢালাই লোহাgলবvআলভ

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

4. FAQ