صمام الكرة الأرضية من الحديد الزهر

1. مقدمةالحديد الزهرGالفصVألف

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

2. Parameters of الحديد الزهرGالفصVألف

وجه الختم

13 كر ،STL ، PTFE ، نايلون ، مع مادة الجسم

3. Advantages of الحديد الزهرgالفصvألف

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

4. التعليمات