John Crane five-ring, test-proven emission packing sets (EPS-1 and EPS-2) combine John Crane G58I and Crane-Foil® packing to provide the best emission compliant packing available. Test results have proven conclusively that these packing sets will contain valve emissions to below 500 ppm.
Two high-density John Crane G58I graphite die-formed rings form the top and bottom sealing rings. A high-strength, high-temperature wire mesh encapsulates the yarn, providing additional tensile strength and extrusion resistance. These rings ensure compression of the middle sealing rings and will prevent any packing extrusion.
Three medium-density Crane-foil die-formed rings with internal wave comprise the center sealing rings, which are completely contained between the end rings.
Non-oxidizing atmosphere: 1200°F/650°C
Oxidizing atmosphere: 850°F/455°C
6,000 psi(g)/415 bar(g)
0 to 14 (except strong oxidizers)