The 36-inch Series 5400 mine tailings control valve from Red Valve Co. features a full-port opening and no cavities to trap solids or debris. The elastomer sleeve isolates the valve body from the process and is abrasion-resistant. The sleeve closes in a smooth, venturi pattern that helps allow for better throttling control over time. Series 5400 valves feature a 20:1 turndown ratio and a zero headloss effect, and they come in sizes to 72 inches. Hydraulic, pneumatic and electric actuators are available. Red Valve Co., Card No. 308