A Beer Sample Valve is a type of sampling valve used primarily in the brewing industry to extract small quantities of beer from fermentation tanks, conditioning tanks, or other vessels for quality control and testing purposes.

Operating principle: when turn the hand wheel clockwise, the valve shaft and seal rise up. At this time, valve is open for sampling. When turn the,hand wheel anti-clockwise, the valve shaft and seal go down,at that time, the valve is closed.