Azbil Corporation No. SS2-8113-2600 - 3 - Cv value and travel Table 1 Body / trim material combinations and operating temperature ranges (°C) Body material Trim material JIS SCPH2 SCPH21 SCS13 SCS14 ASTM A216WCB A217WC6 A351CF8 A351CF8M JIS SUS316 -5 to +300 -50 to +300 -50 to +300 JIS SUS316L -50 to +300 -50 to +300 JIS SUS440C -5 to +425 -5 to +425 JIS SUS316 Stellite -5 to +425 -5 to +425 -50 to +425 -50 to +425 JIS SUS316 Stellite face -5 to +425 -50 to +425 -50 to +425 -50 to +425 JIS SUS316L Stellite -50 to +425 -50 to +425 Note) Column bordered with solid line(“ ”) denote values applicable to standard body/trim combination. Table 2 Cv value and travel Nominal size (inches) 1 1. 2 2. 3 4 5 6 Port size (inches) - - - - - - 3/4 1 1. 1 1. 1. 1. 1. 2 1. 2 2. 2 2. 3 2. 3 4 3 4 5 Rated Cv value (%C, LC) 1.0 1.6 2.5 4.0 6.3 11 11 17 24 17 24 44 24 44 68 44 68 99 68 99 175 99 175 275 175 275 395 Rated travel (mm) 14.3 25 25 38 38 38 50 50 a. Equal percentage characteristics (%C: Metal seat) b. Linear characteristics (LC: Metal seat) Figure 1 Flow characteristics Figure 2 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 3 Temperature/normal differential pressure ranges requiring Stellite Note) 1) When cavitation/flushing service, oil prohibitive service, or retention of valve-close performance is required, use of Stellite is recommended regardless of temperature or differential pressure. 2) 440C stainless steel is recommended for valves for cavitation/ flashing service of water or for superheated service of water higher than 100°C. Cv value (%) Travel (%) Cv value (%) Travel (%) 3 2 1 -50 -30 +300 +350 Maximum pressure(MPa) Welded bellows Formed bellows type II Formed bellows type I Fluid temperature ( C) Stellite 1470 {15} 981 {10} 490 {5} 0 -50 0 +100 +200 +300 Constant differential pressure Fluid temperature ( C) kPa {kgf/cm2} 3 1