Globe valve stem axis and seat sealing surface perpendicular. The valve stem opening or closing stroke is relatively short and has a very reliable shut-off action, making this valve very suitable for use as a medium shut-off or regulation and throttling.

Once the valve disc of the shut-off valve is in an open condition, there is no longer contact between its seat and the sealing surface of the valve disc, and it has a very reliable cut-off action, so that this valve is very suitable for cutting off or regulating the medium and throttling. This type of valve in the pipeline should generally be installed horizontally.

Once the globe valve is in an open state, there is no longer contact between its seat and the disc sealing surface, so its sealing surface mechanical wear is small, because most of the globe valve seat and disc are relatively easy to repair or replace the sealing element without removing the entire valve from the pipeline, which is very applicable to the occasion where the valve and pipeline are welded together. The flow direction of the medium through such valves changes, so the flow resistance of the stop valve is higher than that of other valves.

Holding point of stop valve

(1) The structure is simpler than the gate valve, and it is more convenient to manufacture and maintain.

(2) the sealing surface is not easy to wear and scratch, sealing performance is good, there is no relative sliding between the valve disc and the valve body sealing surface when opening and closing, so the wear and scratch are not serious, the sealing performance is good, and the service life is long.

(3) When opening and closing, the valve stroke is small, so the height of the stop valve is smaller than that of the gate valve, but the structure length is longer than that of the gate valve.

(4) opening and closing torque, opening and closing more laborious, opening and closing time principal.

(5) The fluid resistance is large, because the medium channel in the valve body is tortuous, the fluid resistance is large, and the power consumption is large.

(6) medium flow direction nominal pressure PN 16MPa, generally adopt downstream, medium from below the valve upward flow; nominal pressure PN 20MPa, generally adopt countercurrent, medium from above the valve downward flow. To increase the seal energy. When in use, the medium of the valve can only flow in one direction and cannot change the direction of flow.

(7) valve disc is often eroded when fully open.
 

structural style

Globe valve body structure has straight-through type, direct-current type and right-angle type. The straight-through type is a common structure, but its fluid resistance is large. Direct flow fluid resistance is small, mostly used for fluids containing solid particles or high viscosity. The right-angle valve body is mostly forged and is suitable for smaller and higher pressure globe valves.