Due to the market demand for an all-plastic lug style butterfly valve, GF Piping Systems has launched its second generation 5-series Lug Style Butterfly Valves. The Type 578 valve offers excellent corrosion resistance with long service life and is available in manual, electric and pneumatic actuated versions.
Built with a glass filled polypropylene (PP) outer housing with overmolded SS316 lugs, the 578 valve incorporates a unique “double eccentric” design rather than the traditional (and often problematic) “boot style” design of other plastic lug style valves on the market. The industry tested double eccentric design allows the disc to completely disengage from the disc seal during operation, reducing friction and component wear to provide longer service life without sacrificing the valve’s sealing ability.
Other key benefits associated with the special eccentric principle is that it requires only half the operating torque (over boot styles) and is not susceptible to elastomer swelling over time. The truly non-wetted shaft provides maximum protection against leak out and shaft corrosion. These excellent performance characteristics make it exceptionally well suited for applications in chemical processes and water treatment markets. The new valve is available in PVC, CPVC, PP, ABS and PVDF in sizes from 2 to 12 inches with seal material choices of EPDM, FPM and PTFE.