www.foodengineeringmag.com/articles/86353-high-flow-valves
High-flow valves
November 4, 2007

Suitable for direct mounting to pneumatic actuators, Parker Fluid Control’s NAMUR valves control larger process control valves commonly used in the food and beverage industry. Compact in design, the valves include a “swimming” O-ring design that allows valve sealing to increase proportionally to pressure for reliable switching, even after long periods of inactivity.
Parker Fluid Control Division; 860-827-2300;
www.parker.com/fcd