Tessenderlo. After breaking ground at there Widnes Site two years ago, Tessenderlo have chosen to rely on AVC's actuation experience on their Acyls plant upgrade. Some 40 quarter turn on/off and control ball valves were awarded to ourselves in September 2005 based on delivery within two working weeks. Working closely with Xonox, Pekos, Air Torque, RGS, Fairchild and Circa we have guaranteed all units assembled, tested and despatched on time.