
WINFOSS-A21-3I series SF6 density relay calibration three-way valve is mainly used in the power industry with SF6 gas as the arc extinguishing medium of high pressure equipment, through the operation of the handle knob on the three-way valve, to achieve the three-way valve and the equipment body gas path, off. Thus, the aeration and replenishment of the equipment body and the on-line calibration and replacement of SF6 density controller are realized.
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