Posi flap, headquartered in S ã o Paulo, Minnesota, USA, is a professional manufacturer of valves and butterfly valves. Its main products include valves, butterfly valves, expansion butterfly valves, valve bodies, valve seats, actuator inflatable seat butterfly valves, limit switches and position monitors, pneumatic positioners, dual valves, linear vibrators, stainless steel butterfly valves, high-temperature butterfly valves, gravity steering valves, pilot regulators, etc. The main models include 585 series, TRAK-LOK 649, 7000 series, VIBRA-GATE, VMAX 480, 473, 476, 890, 485 series, 435 series, 486 series, 470 series, 890 series, 649 series, etc.

Since its establishment in 1903, Rockwell has been deeply involved in industrial automation, avionics, communication, and e-commerce. Its products include: programmable logic controllers, power devices, sensors, operator interfaces, motion control products, industrial control software, etc.