The diaphragms are available as below: Compound Working Temp. Range Fluids NBR -15 °C to + 80 °C mineral oils ECO (HYDRIN) -40 °C to +125 °C mineral oils IIR (BUTYL) -30 °C to + 90 °C brake fluids FKM (VITON) -45 °C to +150 °C chlorinated hydrocarbons
