Azbil Corporation No. SS2-AGV200-0001 - 7 - 3-2 Actuator 3-2-1 Actuator and valve actions Selection of actuator actions determines valve actions (in response to input signals). Air-to-open: actuator action where the valve opens as the input signal increases Air-to-close actuator action where the valve closes as the input signal increases 3-2-2 Tables of allowable differential pressures Ensure the required shutoff differential pressure specified in the equipment design is satisfied by selecting an actuator with an allowable differential pressure equal to or higher than the shutoff pressure, according to the seat leakage class. Leakage, specification Class IV (0.01% of rated Cv value) . Model AGVB Air-to-open: Table 11 and 12 Air-to-close: Table 13 and 14 . Model AGVM Air-to-open: Table 15 and 16 Air-to-close: Table 17 and 18 Leakage, specification Class V (high shutoff model: metal seat) or Class IV-S1 (0.0005% of rated Cv value) . Model AGVB Air-to-open: Table 19 and 20 Air-to-close: Table 21 and 22 . Model AGVM Air-to-open: Table 23 and 24 Air-to-close: Table 25 and 26 Leakage, specification Class VI (high shutoff model: soft seat) . Model AGVB Air-to-open: Table 27 and 28 Air-to-close: Table 29 and 30 . Model AGVM Air-to-open: Table 31 and 32 Air-to-close: Table 33 and 34 At your request, we can manufacture control valves with normal pressures exceeding 1.96 MPa. 3-2-3 Supply pressure and spring ranges Select the actuator using the table of allowable differential pressures. The table also assists in determining the actuator's required supply pressure and required spring range. 3-2-4 Performance (with positioner) 3-2-5 Finish The normal standard coating color for Azbil Corporation's control valves is blue (Munsell color 10B 5/10). Silver is also available as standard. Standard colors are also used for such optional accessories as positioners, pressure regulator with filter, and solenoid valves. 3-2-6 Ambient temperature -30 to 70 oC Figure 14 Actuator structure n r Spring Diaphragm: cloth embedded propylene rubber Yoke: carbon steel A216WCB (SCPH2) Scale plate: stainless steel Stem connector Air pressure connection end of air-fail-open model Air pressure connection end of air-fail-close model With the Alphaplus, the valve closes as the plug lowers. The valve action depends, in turn, on whether an air-toopen or air-to-close actuator is chosen. The material of bolt and nut are SUS304. If the applicable value in the table of allowable differential pressures is not large enough for the shutoff pressure you need, we sill, at your request, consider a larger actuator size. Actuator PSA1 PSA2 to 4 PSA6 Linearity VPE +3 - - AVP HEP +2 +1 +2 HTP Hysteresis error 1 1 2 You can specify any other color using the number code of the Japan Paint Industry Assignment or the Munsell color system. 1 1