Leaks from control valve stems, the bane of chemical plants everywhere, can be beaten. So says Honeywell, which announces a new leak-reducing option on its Series 2000 globe valves.
The new design has been successfully tried and tested at Akzo Nobel Chemicals’ Rotterdam plant. It uses two independent packing systems of PTFE-impregnated graphite rings. These are held under a constant spring pressure and ensure maximum tightness to close the gap between the stem and valve body.