Elastomer liner – key to success for centred-disc butterfly valves

Centred-disc butterfly valves feature a relatively straightforward design. Alongside housing, disc and shaft, the liner constitutes the core element of this type of valve. The centred-disc butterfly valves’ liner is generally made of an elastomer and ensures tight sealing at the flanged line connections, the rubber liner/disc interface and the shaft passages. The following article explores the properties and function of this important valve component.