Controller 3 Evolution
it’s a special sealing graphite stem set Ta Luft VDI 2440 approved, fully composed by formed braided rings. The compression packing GR80SGR is made with expanded graphite Sigraflex® yarns impregnated one by one with a special compound of graphite reach of passive inhibitor of corrosion and solid lubricants which is suitable also in Dry style for Oxygen use. Controller 3 Evolution guarantees a very low weight loss in accordance to the EN 14772, section 6.7 and great recovery for a long time and the sealing performance without retightening. The valve packing GR80SGR can guarantees the Ta Luft requirements along the maintenance cycles after the first installation.