Azbil Corporation No. SS2-BSL100-0100 - 5 - Note: Regarding the material of the parts shown here, the usual valve/trim combination of SCS14A/SUS316 is shown. If materials with greater corrosion resistance are desired, please contact the Azbil Group. Selection of a Bellows Seal Selection of a bellows seal involves the following 2 steps. 1. Select a Basic Type Based on Design Temperature and Pressure Refer to Figure 5, "Bellows Type by Temperatures and Pressure Ranges" and select a basic type for the bellows seal that can be used in accordance with the design temperature and the design pressure of the fluid. 2. Check Whether Lifespan of Selected Bellows is Adequate Determine the expected stroke length and refer to Figures 6, 7, and 8 to find the estimated life of the selected bellows seal (in number of cycles). If a Formed bellows type I or Formed bellows type II is selected as the basic type, and if the estimated lifespan does not meet requirements, upgrade to another type of bellows seal. (If the basic type is the Formed bellows type I, upgrade to Formed bellows type II or to the Welded bellows. If the basic type is Formed bellows type II, upgrade to the Welded bellows.) Figure 5 Bellows Type by Temperature and Pressure Ranges 3 2 1 -50 -30 +300 +350 Maximum pressure(MPa) Welded bellows Formed bellows type II Formed bellows type I Fluid temperature ( C) 8 4