High-frequency Knockers FPK Properties • High impact frequency 1 '350 - 4'600 vpm • High force range 195 - 56'350 N • Lubrication-free • Can be used up to 120°C, HT version up to 150°C and LT version down to -40 °C on request • Can be used in dusty environments • Also available with ATEX certification Field of application Broad field of application, for example knocking off adhering material from container walls such as silos, chutes, filter outlets, reactors and pipelines. Construction With the FPK-knockers compressed air pushes a piston in a linear direction (vibration). When used as a high frequency knocker, the piston shoots against a plastic baffle plate supplied with the knocker. Additional impact regulation is provided by baffle plates of varying hardness. Technical data Baffle plate none soft hard none soft hard