No. SS2-8113-0200 Azbil Corporation - 2 - Gasket Type Flat type, serrated type Material Stainless steel (SUS316, SUS316L, SUS329J1), copper, aluminum, titanium, ASTM B574 (Hastelloy C-276 equivalent), or Alloy 20 Trim Valve plug Single seated, Contoured type plug . Metal seat (for flow characteristics, refer to Figure 1.) Equal percentage (%CF), Linear (LCF) . Soft seat (for flow characteristics, refer to Figure 1.) Equal percentage (%TF), Linear (LTF) Single seated, Quick-opening type plug . Metal (Stellite) seat (QS) When a soft seat is required, use a contoured type soft seat. Note) 1)For operating temperature or pressure range of soft seat, refer to Figure 3. 2)For rated Cv 0.01 to 0.1 cage guide trim Material For body/trim material combinations and operating temperature ranges, refer to Table 1. Note) For fluid conditions requiring stellite, refer to Figure 4. Actuator Type Single acting diaphragm actuator (TypePSA, HA) Action Direct or reverse action Diaphragm Cloth embedded ethylene propylene rubber Spring range 20 to 98 kPa {0.2 to 1.0 kgf/cm2} or 80 to 240 kPa {0.8 to 2.4 kgf/cm2} Supply pressure 120 to 390 kPa {1.2 to 4.0 kgf/cm2} Note) Allowable differential pressure varies depending on spring range and air supply pressure. Air connection Rc1/4 or 1/4NPT internal thread Ambient temperature -30 to +70 oC Valve action Air-to-close (Direct action actuator is combined.) Air-to-open (Reverse action actuator is combined.) Optional accessories Positioner*, pressure regulator with filter, hand wheel*, limit switch, solenoid valve, motion transmitter, booster relay, lock-up valve, and others. Note) 1) For the optional items, refer to the specification sheets and installation drawings of respective accessories. 2) Accessories with the asterisk mark(*) are selected from among the following types depending on the actuators to be combined. Additional specifications (by special order) . Special inspection Flow characteristics inspection, material inspection (Material certificate), non-destructive inspection, steam inspection, low-temperature inspection . With drain plug . Double gland . Oil/water free treatment . Copper free treatment . York material SCPH2 (Yoke material of PSA1 is SCPH2 as standard) . Stainless steel (SUS304) atmosphere-exposed nuts and bolts . Special air piping and joint . Sand-/dust-preventive measure . Saline damage countermeasure . Cold-area use specification . Tropical-area use specification . Vacuum service Note: Sizing When the flow rates are small, a laminar flow is formed at the vena contracta of the valve if the fluid viscosity is relatively small or the differential pressure is high.Valve capacity is defined on the assumption that the flow at the vena contracta is turbulent. For this reason, valve capacity at the vena contracta is calculated large unless the Cv value calculation formula is corrected to the logical dimensions, which may produce a valve capacity insufficient for the application.Refer to the Instrumentation Bulletin No.ID2-8000-3800 correcting Cv calculations based on fluid viscosity, and refer to No. PD2-8110-0500 for valves with such micro Cv values as 0.01, 0.04 or 0.1. Actuator Positioner Hand wheel P/P I/P Top Side PSA1 VPE/HTP AVP/HEP THM SHM HA2 HTP AVP/HEP THM SHM