New-generation soft seated butterfly valves

Fourth Quarter 2020 Shaft power components

Valve specialist GEMÜ has redesigned its tried and tested butterfly valves and now offers the GEMÜ R480 Victoria in wafer version. Thanks to its flow-optimised and sleek disc design, the redesigned butterfly valves achieve higher flow rate factors. This reduces the pressure loss, giving them greater energy efficiency. With constant compression on axes and shaft bearings, they provide great savings in operating costs as they require a lower torque for operation. Furthermore, the PTFE-coated steel bushes in the axis and shaft area further reduce the torque, thereby helping to save costs. The layer thickness of at least 250 µm ensures consistent corrosion protection in accordance with ISO 12944-6 C5M, even in the liner area. The use of the whirl sintering method considerably improves the adhesion of the coating to the metal when compared to static powder coating.

Another feature of the R480 Victoria series is the optimisation of their liners for improved tightness. The inclusion of additional material in the seat, axes and shaft areas – as well as a groove in the flow direction for positive liner fixing – improves the sealing and resistance to slipping. A fixed point for the liner on the valve body makes it easy to change liners and to read the liner material. These new butterfly valves stand out due to their service-friendly and replaceable components and their greater safety and efficiency. With the integration of an RFID chip, GEMÜ goes a step further and is prepared for Industry 4.0.

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