Introduction to the structure of the stop valve
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Release Time：2021-05-21
Globe valve by the stem to drive the valve for lifting movement, change the distance between the valve and the valve seat, to achieve open or close the channel. In order to make the valve in the closed state does not leak, valve and valve seat sealing surface must be reliable, the sealing surface can be in the valve body, valve directly processed, can also be mounted sealing ring or surfacing other metal, sealing ring material is often stainless steel, copper alloy, hard alloy, rubber, plastic and so on. The connection between the valve flap and the valve stem should be movable connection, that is, the center line of the valve flap can deviate from the valve stem axis in any direction to ensure that the valve flap can be closely fitted with the valve seat, that is, it has a self-adjusting effect.
Globe valve is mainly composed of valve body, valve seat, valve clack, valve stem, valve cover, stuffing box, packing gland, stem nut, hand wheel, etc.
Globe valve by the stem to drive the valve for lifting movement, change the distance between the valve and the valve seat, to achieve open or close the channel. In order to make the valve in the closed state does not leak, valve and valve seat sealing surface must be reliable, the sealing surface can be in the valve body, valve directly processed, can also be mounted sealing ring or surfacing other metal, sealing ring material is often stainless steel, copper alloy, hard alloy, rubber, plastic and so on. The connection between the valve flap and the valve stem should be movable connection, that is, the center line of the valve flap can deviate from the valve stem axis in any direction to ensure that the valve flap can be closely fitted with the valve seat, that is, it has a self-adjusting effect.
Cut-off valve stem drive thread is located in the valve cover, called the lower thread, its compact structure, but the stem thread by the role of the medium, for small valves; drive thread is located on the outside of the valve cover, called the upper thread, can be lubricated, not affected by the role of the medium, for large valves. Valve body structure can be divided into straight-through, right-angle, DC and so on. When facing the handwheel or handle, turn the handwheel or handle clockwise to close the valve.
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