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Twist-type straight valve is made of ABS with 5mm outer diameter valve stem as connector. ABS twist-type valve has on/off function and hose barb connection/coupler. When turn valve stem clockwise, it moves down; the valve is closed; when valve stem moves up, the valve is open. The time of valve stem moving up and down is short,the gas gose from valve seat hole into the bonnet cavity,then leakage from the bonnet hole,so the valve stem must be rotated quickly in the process and can’t put the valve stem in and off in the middle of the state.Besides,valve should be fully open when replacing and cannot rotate valve stem in the process of replacement.
ABS twist-type straight valve is suitable for collection and preservation of inorganic and organic gas samples that are not corrosive to ABS and silicone rubber.
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