Cast Steel Wcb Flanged Globe Valve For Water Steam And Oil Pipeline Use

Product introduction:

Globe valve, also known as the cut-off valve, belongs to the forced sealing valve, the stem axis of the globe valve is vertical to the sealing surface of the valve seat, and is broken by driving the spool up and down.Its opening and closing parts are plug shaped disc, sealing above a plane or sea cone, disc along the center line of the seat for linear movement, so when the valve is closed, pressure must be applied to the disc to force sealing surface does not leak.

When the globe valve is opened, the opening height of the valve disc is 25% ~ 30% of the nominal diameter.When the flow has reached the maximum, the valve has reached the fully open position.Therefore, the full open position of the globe valve should be determined by the stroke of the valve disc.

Globe valve stem open or close stroke is relatively short, and has a very reliable cut off function, and because of the change of the valve seat opening and the stroke of the disc is directly proportional to the relationship, is very suitable for flow regulation.Can be used in most media flow systems.At present, we have developed a variety of forms of globe valves to meet the needs of petrochemical, electric power, metallurgy, urban construction, chemical and other departments.

Product parameter:

Product features:

1. In terms of structure, globe valve is simpler than gate valve. There is only one sealing surface on the valve body and valve disc, which has good manufacturing technology and is easy to manufacture and maintain.Globe valve in the full closing process of the disc travel is small, its height is relatively small gate valve.

2. The opening height of the globe valve is small in the opening and closing process. The opening height is generally only 1/4 of the diameter of the valve seat channel and has very reliable cutting action, which is easy to adjust the flow.

3. From the service life, once in the open state, there is no contact between the seat and the sealing surface of the disc, the sealing surface is not easy to wear and scratch, so it improves the service life of the seal.

4. The globe valve only allows one-way flow of media, directional installation, the length of the globe valve structure is greater than the gate valve.

5. The opening and closing torque of globe valve is large and it is difficult to realize fast opening and closing. Moreover, the flow passage in the valve is tortuous and the fluid flow resistance is large, resulting in a large loss of fluid power in the pipeline

6. When the medium from below the valve disc into the valve, the operation force needs to overcome the resistance, is the friction of the stem and packing and the thrust produced by the pressure of the medium,

7. Globe valve closing valve force is larger than opening valve force, so the stem diameter should be large, otherwise stem top bending failure will occur.