VA Flow MetersRA 65 / FA 6588. Maintenance and cleaning of the flow meterThe device is maintenance-free. Should the glass cone become fouled, the device can beremoved from the pipeline as follows.8.1. Dismantling and installationRemove the flow meter out of the system by detaching the union nuts or, as the case maybe, the screw connections and/or pipe unions. After dismantling the upper head (detach theradial retaining screw), remove the measuring glass from the device and clean the individualparts. Reassemble in reverse order. Pay special attention to correct installation of theappropriate gaskets and the float stops. Before installing, inspect all gaskets (see Figure onpage 5) for signs of damage, and replace if necessary.8.2. Replacement of measuring glassRefer to Figure on page 5.1. Remove the device from the installation point. Detach the lateral retaining screwsand remove the device heads by simultaneously twisting and pulling them out of theglass. On devices with a guide rod, leave the rod mounted on the upper head!2. On devices with non-guided floats, remove the float stops and the float from the oldglass and insert them into the new glass. Carefully screw the float stops (helicalsprings made of VA steel) using pliers into the ends of the glass (risk of glassbreakage!).3. Fit the device heads with new O-rings and gaskets.4. Wet the O-ring before assembling glass and head.5. Carefully slide the lower device head into the bottom opening of the measuring glass,twisting and pushing simultaneously (risk of glass breakage!).6. Insert the glass with head into the case, making sure not to knock the glass againstthe case.7. Fasten the device head with the retaining screws to the case.8. Align the glass cone so that the inscriptions can be read through the viewing windowon the case.9. Slide the second head with wetted O-ring by twisting and pushing it simultaneouslyinto the upper opening of the measuring glass, or steel case, as the case may be.Also lock the head in place on the case.10. On devices with guide rod, check float mobility. If necessary, correct the position byturning the guide rod (to do this, hold the plain end of the guide rod at the lower headwith a pair of engineer’s pliers, or similar, and slightly loosen the M5 screw at theopposite end).11. Reinstall the device in the installation point.A. Kirchner & Tochter GmbH Dieselstraße 17 · D-47228 DuisburgFon: +49 2065 9609-0 · Fax: +49 2065 9609-22 Internet: www.kt-web.de · e-mail: info@kt-web.deVersion 1.1