DN40 Deyi Sanitary Food Grade Stainless Steel 304/316L Pneumatic Flange Angle Seat Valve Plastic/Stainless Steel Head Nice Price Fatory. Dual Material Options: Available in Stainless Steel 304 and 316L for food grade applications. Wide Temperature Range: Operates from -20 to 120 degrees Celsius with optional 180 degrees. Fast Response Action: Designed for frequent short-time starts with delicate and exact action. Multiple Connection Types: Supports Weld, Clamp, Thread, and Flange connection forms. Self-Regulation Sealing: Features self-regulation sealing gland between overfall and slider. Pneumatic Actuator Options: Available in Plastic or Stainless Steel actuator types. Position Display: Includes valve open or close position display for easy monitoring. Maintenance Free Design: Pneumatic guide outside design prolongs service life.