We (SchuF) had a similar application for similar temperatures. We eventually had packing rings custom made in calcium silicate yarn at a company in the UK (http://www.beldam-crossley.co.uk/).
Dear All,
we're experiencing severe errosion on some PTA control valves. The most severe is on the pump recirculation valves which see ~100 pressue drop over the seat with 23% solids content in the slurry flow. These valves are installed on the line after the booster pumps to recirculate flow...
