1 This valve is mainly composed of valve body, valve cover, valve disc and other components to form a spherical valve body, and the force is even.
2. The valve is manually operated. Turn the handwheel clockwise, the valve closes, rotate the handwheel counterclockwise, and the valve opens.
3, DN50 ball bearings, DN150, DN200, DN300 and other large diameter valves add a secondary valve flap. The flow direction of the medium flows downward from the upper part of the valve flap.
4. In order to achieve good sealing performance, the structural design is guided by the motion of the valve flap so that it can accurately fall on the valve seat. When the valve flap is guided in the valve body, the valve flap is subjected to the lateral driving force of the flowing medium. It is received by the valve body rather than by the valve stem, which further increases the sealing performance and the possibility of packing sealing.
5. The valve stem is designed as a descending rod, that is, when the valve stem is lifted and lowered, the valve flap is lifted and lowered, and the friction between the valve flap and the valve seat is reduced again to reduce the wear of the filler, and the upper seal wear may also be Reduce to a small extent.
6. The grounding bolt is provided on the end flange of the valve body, which should be connected by a bolt, which can avoid the explosion accident caused by static electricity. The exposed part of the valve stem has protective measures to protect the earth and oil. Lubricating grease is used for the lubrication of the bracket bearing, and the plexiglass cover is installed at the frame of the bracket. There is an obvious oil-free mark to remind the site personnel to pay attention.