https://www.powtech.de/en/ausstellerprodukte/powtec19/product-10158717/tork-mate-pneumatic-actuator

The Tork-Mate 890 Series actuators from Posi-flate achieve up to 15 million cycles maintenance-free, at low cost. They are ideal for 90° and 180° turn devices such as butterfly valves, ball valves, plug valves and damper valves. They meet the latest NAMUR standards, allowing direct or close coupling of NAMUR designed accessories. Custom options include Viton seals, high temperature trim, special finishes, stainless steel pinions, special mounting configurations and special coupling configurations.

Posi-flate manufactures a complete line of inflatable seated butterfly valves and actuators for handling a wide variety of dry bulk granular solids, liquids and gases. Standard valve sizes are from 2 inch (5 mm) to 30 inch (750 mm) and are offered in a wide variety of construction materials. Stainless steel, ductile iron and aluminum construction is available as standard equipment. Standard finishes include urethane coating, nylon powder coating, epoxy coating, highly polished stainless steel discs and bodies plus almost any custom paint type and color. A working display will be shown demonstrating the inflatable seat in operatio.