Azbil Corporation No. SS2-VFR100-0100 - 5 - Allowable differential pressures Metal seat, PTFE packing Table 6 Air-to-Close Table 7 Air-to-Close Figure 3 Flow characteristic for 60% port or high differential pressure port Actuator model No. Air supply pressure kPa {kgf/cm2} Spring range kPa {kgf/cm2} Differential pressure [Upper : by nominal size (inch), Lower : port capacity] kPa{kgf/cm2} 6 8 10 12 Full 60% 40% Full 60% 40% Full 60% 40% Full 60% 40% VR3D 340 {3.5} 80 to 160 {0.8 to 1.6} 2060 {21.0} 2060 {21.0} 2060 {21.0} 981 {10.0} 981 {10.0} 981 {10.0} 490 {5.0} 80 to 160 {0.8 to 1.6} 981 {10.0} 981 {10.0} 981 {10.0} 780 {8.0} 780 {8.0} 780 {8.0} VR3HD (high differential press) 340 {3.5} 90 to 160 {0.9 to 1.6} 4100 {41.8} 5100 {52.0} 1900 {19.3} 2700 {27.5} 490 {5.0} 90 to 160 {0.9 to 1.6} 2000 {20.4} 2900 {29.5} 1200 {12.2} 1900 {19.4} Actuator model No. Air supply pressure kPa {kgf/cm2} Spring range kPa {kgf/cm2} Differential pressure [Upper : by nominal size (inch), Lower : port capacity] kPa{kgf/cm2} 6 8 10 12 Full 60% 40% Full 60% 40% Full 60% 40% Full 60% 40% VR3R 340 {3.5} 80 to 160 {0.8 to 1.6} 1180 {12.0} 1180 {12.0} 1180 {12.0} 180 to 270 {1.8 to 2.8} 2060 {21.0} 2060 {21.0} 2060 {21.0} 981 {10.0} 981 {10.0} 981 {10.0} 490 {5.0} 490 {5.0} 490 {5.0} 340 {3.5} 340 {3.5} 340 {3.5} VR3HR (high differential press) 340 {3.5} 90 to 160 {0.9 to 1.6} 2000 {20.4} 2700 {27.5} 190 to 270 {1.9 to 2.8} 4300 {43.8} 5100 {52.0} 2000 {20.4} 2900 {29.5} 1100 {11.2} 1600 {16.3} 690 {7.0} 1000 {10.2} 0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100 Travel (%) Cv value (%) 4 2