With the combination of pipe material (PVC-C, PP-H or PVDF) and the PTFE/FPM seal GF Piping Systems‘ PP-H and PVC-C butter-fly valves offer many advantages, the most significant of which is the very good resistance to chemicals that guarantees a long lifetime and reliable use of the valves, even when aggressive media are transported. The polymer-based butterfly valves also offer decisive benefits in terms of weight, compared to traditional metal valves lined with PTFE/PFA. Having lightweight valves saves on transport and handling. Another plus are the excellent sliding properties of PTFE. In combination with the valve’s proven double eccentric operating principle, the actuation torque can be kept much lower than for a centric design with elastomer sleeves. The butterfly valves are not only easier to operate, but also require much smaller actuators when used as automated process valves.
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