The difference between upspread and downspread:
1 folding opening and closing stroke
The opening and closing stroke is different, the installation size has the size of the upspread type and the downspread type feeding valve opening and closing stroke is small, the installation height is small. The mounting height of the rotating rod structure is small. During the opening and closing process, the plunger only rotates. It should judge the opening and closing and position of the valve according to the indicator of the opening and closing position.
Folding opening and closing moment
Upspread feeding valve for the disc upward movement valve open, open the valve to overcome the medium force, open than close torque.
Downspread, plunger feeding valve for the disc (plunger) downward movement of the valve open, open the direction of movement and the same force of the medium, so open the smaller than the closing torque.
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