Azbil Corporation No. SS2-8114-0300 - 5 - Figure 3 Bellows Type by Temperature and Pressure Ranges Note) Bellows type are classified into Formed bellows type I, II and welded bellows by temperature and pressure ranges. Please refer to No. SS2-BSL100-0100 about detail of bellows specification. Figure 4 Temperature and maximum differential pressure range of soft-seat type Note) If there is any possibility to cause erosion due to saturated steam or superheated-water, use the metal seat. Figure 5 Temperature / normal differential pressure ranges requiring Stellite Note) 1) SCS24 (Precipitation-hardened stainless steel) requires no Stellite. 2) When cavitation / flashing service or oil prohibited service is required, use of SCS24 or Stellite is recommended regardless of temperature and differential pressure. 3 2 1 -50 -30 +300 +350 Maximum pressure(MPa) Welded bellows Formed bellows type II Formed bellows type I Fluid temperature ( C) Maximum pressure Fluid temperature ( C) Glass-inserted PTFE PTFE Carbonfiber inserted PTFE 2940 {30} 1470 {15} 2940 {30} 1470 {15} 0 -80 +100 +200+230 kPa {kgf/cm2} Stellite 1470 {15} 981 {10} 490 {5} 0 -196 0 +100 +200 +300 Maximum pressure Fluid temperature ( C) kPa {kgf/cm2} 6 3