Gang thépgthùyvalve is a forced-sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the friction force of the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so Gang thépThe diameter of the valve stem of the gthùyvalve should be large, otherwise the valve stem will bend up failure.
2. Parameters of Gang thépGthùyValve
Loại van
Gang thépgthùyvalve
DN
DN10~DN600
PN(MPaï¼ ‰
1,6~16Mpa
Phạm vi nhiệt độ thiết kế
-15â „ƒï½ž200â„ ƒ
Kiểu kết nối:
Mặt bích
Loại thiết bị truyền động
Truyền động bằng tay, Bộ truyền động khí nén, thủy lực hoặc điện
Phương tiện áp dụng
Nước, dầu, khí và các phương tiện ăn mòn khác nhau
Phụ tùng
Vật chất
Đĩa vỏ cơ thể
Thép rèn, thép đúc
Thân cây
Thép rèn, thép đúc
Đóng gói
Graphite linh hoạt, Graphite linh hoạt nâng cao, PTEE
Niêm phong Shim
Than chì Flexiblo tăng cường, thép chống ố, PTFE
Niêm phong khuôn mặt
13Cr,STL, PTFE, Nylon, Với vật liệu cơ thể
3. Advantages of Gang thépgthùyvalve
1) The structure of the Gang thépgthùyvalve is simpler than that of the gate valve, and it is more convenient to manufacture and maintain.
2) Bề mặt niêm phongof Gang thépgthùyvalve is not easy to wear and scratch, and the sealing performance is good. There is no relative sliding between the valve disc and the sealing surface of the valve 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 Gang thépgthùyvalve is opened and closed, the disc stroke is small, so the height of the shut-off valve is smaller than that of the gate valve, but the structure length is longer than that of the gate valve.
4) Gang thépgthùyvalve has a large opening and closing moment, which is laborious and takes a long time.
5) The medium channel in the Gang thépgthùyvalve 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 Gang thépgthùyvalve PN≤16MPa, the downstream flow is generally adopted, and the medium flows upward from the bottom of the valve flap; when the nominal pressure PN≥20MPa, the reverse flow is generally adopted, and the medium flows downward from the top of the valve flap. In order to increase the seal performance. When in use, the shut-off valve medium can only flow in one direction and cannot change the direction of flow.
7) The valve flap is often eroded when the Gang thépgthùyvalve is fully opened.
4. Câu hỏi thường gặp