Azbil Corporation No. SS2-ADV100-0100 - 5 - 3-2 Actuator Figure 5 Actuator structure Air pressure connection end of air-fail-open model Air pressure connection end of air-fail-close model Spring Diaphragm: fiber-rein-forced ethylene propylene rubber Yoke: carbon steel A216WCB (SCPH2) Scale plate: stainless steel Stem connector 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 shut-off pressure. 3-2-3 Air 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 air supply pressure and required spring range. 3-2-4 Finish The normal standard finish color for Azbil Corporation's control valves is blue (Munsell 10B 5/10). Silver is also available as standard. 3-2-5 Ambient temperature -30 to +70°C With the Alphaplus, the valve closes as the plug lowers. The valve action depends, in turn, on whether an Reverse or Direct actuator is chosen. 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. You can specify any other color using the number code of the Japan Paint Industry Assignment or the Munsell color system. 2 8