No. SS2-8113-0220 Azbil Corporation - 6 - Quick-opening type metal (Stellite) seat (QS) Note) 1)“ " shows a model with a standard actuator. 2) Take care not to cause the maximum allowable differential pressure to exceed the maximum operating pressure designated by ANSI B16. 34-1981, or JIS B2201-1984. Table 5 Air-to-close Action Model No. Supply pressure kPa {kgf/cm2} Spring range kPa {kgf/cm2} Differential pressure kPa {kgf/cm2} Cv=10 Cv=14 PSA1D 140 {1.4} 20 to {0.2 to } 720 {7.3} 490 {5.0} 290 {3.0} 20 to 52 {0.2 to 0.53} 2000 {20.0} 1800 {18.0} HA2D 140 {1.4} 20 to 52 {0.2 to 0.53} 1430 {14.6} 1300 {13.0} 290 {3.0} 20 to 52 {0.2 to 0.53} 3900 {40.0} 3600 {37.0} Table 6 Air-to-open Action Model No. Supply pressure kPa {kgf/cm2} Initial spring compression kPa {kgf/cm2} Differential pressure kPa {kgf/cm2} Cv=10 Cv=14 PSA1R 140 {1.4} 40 {0.4} 330 {3.4} 290 {3.0} 270 {2.8} 80 {0.8} 670 {6.8} 590 {6.0} HA2R 140 {1.4} 40 {0.4} 660 {6.7} 590 {6.0} 270 {2.8} 80 {0.8} 1320 {13.5} 1190 {12.1}