No. SS2-8193-0200 Azbil Corporation - 6 - Allowable differential pressure Note) ..: Positioner is necessary Note) ..: Positioner is necessary Table 2 Air-to-close Actuator model no. Supply pressure kPa {kgf/cm2} Spring range kPa {kgf/cm2} Positioner Type Differential pressure kPa {kgf/cm2} 3/4 1 1. 2 PSK1D 270 {2.8} 80 to 240 {0.8 to 2.4} .. Plug bellows type 490{5.0} 490{5.0} 190{1.9} 120{1.2} General plug type 590{6.0} 490{5.0} 190{1.9} 120{1.2} 390 {4.0} 120 to 290 {1.2 to 3.0} Plug bellows type - - 490{5.0} 490{5.0} General plug type 590{6.0} 590{6.0} Table 3 Air-to-open Actuator model no. Supply pressure kPa {kgf/cm2} Spring range kPa {kgf/cm2} Positioner Type Differential pressure kPa {kgf/cm2} 3/4 1 1. 2 PSK1R 270 {2.8} 80 to 240 {0.8 to 2.4} .. Plug bellows type 490{5.0} 490{5.0} 490{5.0} 490{5.0} General plug type 590{6.0} 590{6.0} 590{6.0} 490{5.0} 340 {3.5} 120 to 290 {1.2 to 3.0} Plug bellows type - - - 490{5.0} General plug type 590{6.0}