A bolted bonnet sluice valve, also known as a bolted bonnet gate valve, is a type of valve that regulates the flow of liquids, gases, or air by using a gate or wedge-shaped disc. The valve features a bonnet, which is the top part of the valve, securely attached to the valve body using bolts, nuts, and studs. This design allows the bonnet to be removed for easy access to the stem and other internal components when maintenance is needed. The gate in the valve moves perpendicular to the fluid flow, and when fully open, it provides an unobstructed passage, minimizing any resistance to the flow.