Azbil Corporation No. SS2-ADV100-0100 - 3 - 3-1-4 Body and plug seat ring materials For combination of body and plug seat ring materials and their applicable temperature ranges, see Table 2. In some ranges the plug seat ring material needs hardening treatment. Note) For valve for cavitations/flashing service, oil-free service or tight shut-off service, Stellite is recommended regardless of process fluid temperatures or differential pressures 3-1-5 Leakage specification For the seat leak performance when the valve is fully closed, select from among the following two classifications, which conform to IEC 60534-4:2006 and JIS B 2005-4:2008. Class III : Leakage less than 0.1% of maximum valve capacity. Class IV : Leakage less than 0.01% of maximum valve capacity. 3-1-6 Inherent range ability 50 : 1 3-1-7 Gland packing According to your application, select the appropriate type of gland packing from the followings: Note) PTFE: polytetrafluoroethylene resin *1 Grease provided *2 Volatile Organic Compound *3 Refer to No.SS2-SSL100-0100 about detail of SECURE-SEAL. Table 2 Body/trim material combinations and operating temperature ranges (°C) Material combination Temperature ranges (°C) SUS316 -5 to +300 -45 to +300 -45 to +300 SUS316 Stellite (seat) -5 to +400 -45 to +400 -45 to +400 SUS316 full Stellite (seat) -5 to +400 -45 to +400 -45 to +400 Body Material JIS SCPH2 SCS13A SCS14A ASTM A216WCB A351CF8 A351CF8M Figure 4 Temperature and normal differential pressure ranges that require Stellite Table 3 Gland packing Usage Type Material General use (oils, solvent acids, alkalis, etc.) PTFE yarn packing (P4519) Woven PTFE yarn with carbon fiber core General use and oil-free treatment V shaped PTFE packing PTFE molding Vacuum service V shaped PTFE packing (direct+reverse mounted) PTFE molding Low temperature service V shaped PTFE packing PTFE molding High temperature service Graphite yarn pacing*1 (P6610CL+P6722) Graphite Low leakage spec. for VOC*2 regulation (SECURE-SEAL)*3 PTFE yarn packing(P4519) with live load structure Woven PTFE yarn with carbon fiber core -45 0 +100 +200 +300 +400 1470 {15} 981 {10} 490 {5} 0 Normal differential pressure kPa {kgf/cm2} Range that requires a stellite Fluid temperature ( C) 2 8