Trade.Information

Product Name: Model ACN

Product Description

OVERVIEW: - Model ACN Low-Noise Cage type Control Valves have been designed to remarkably reduce acoustic noise in services of compressible fluids such as steam, air, and natural gas. The cage has a large number of small holes and renders an ideal pressure reduction with a combination in two steps of “restriction” and “diffusion and expansion”. The fluid passage has been designed in Sfigure shape for smooth flow of fluid with less pressure loss and a stabilizer is provided as a strainer for flow near the cage, thereby permitting a large Cv value. The valve plug is of a pressure-balanced type which allows control of a high differential pressure with a small actuating force. The actuator is a compact but high output diaphragm motor of a multiple spring typ e structured in a simple mechanism. The model ACN valves, which are compact but of a low noise type and render high dynamic stability, are suitable especially for control of high temperature, high pressure or high differential pressure process lines. SPECIFICATIONS: - Body Type: Straight-through, cast globe valve Nominal size: 1½, 2, 2½, 3, 4, 5, 6, 8 inches Pressure rating • JIS 1 0K, 16K, 20K, 30K, 40K • ANSI Class 125, 150, 300, 600 • JPI Class 125, 150, 300, 600 End connection • Flanged end; FF, RF, RJ, LG Tongue and groove type (groove), Male and female (female) •M Waeteldreida le nd; SW (1½, 2 inches), BW (2½ to 8 inches) For combining th e valve body, trim materials and the operating temperature ranges, refer to Table 2. Bonnet • Plain bonnet (-17 to 230°C) • Extension bonnet Type 1 (230 to 360°C and -45 to -17°C) • Extension bonnet Type 2 Integral cast type (-100 to -45°C), Welded type (-196 to -100°C) Note) Take care not to exceed the operating temperature ranges specified for respective materials. Gland type Bolted gland Packing / Grease • Grease not provided when V shaped PTFE packing or PTFE yarn packing is used. • Grease provided when asbestos y arn, PTFEimpregnated asbestos yarn, asbestos yarn with graphite, or graphite packing is used. Tri m Valve plug Single seated pressure balanced type Cage Porous double-throttle mechanism Linear cage (LV) (For flow characteristics, refer to Figure 2.) Material For combining the valve body, trim materials and the operating temperature ranges, refer to Table 2. Note) For fluid conditions that require Stellite, refer to Figure 3. Actuator Typ e Single acting diaphragm actuator (Type HA) Action Direct or reverse action Diaphragm Type HA; 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 Diaphragm actuator; 140 to 390 kPa {1.4 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°C Valve action Air-to-close (Direct action actuator is combined.) Air-to-open (Reverse action actuator is combined.) Optional accessories (provided upon request) Positioner*, pressure regulator with filter, handwheel*, limit switch, solenoid valve, motion transmitter, booster relay, air lock-up valve, and others. Note) 1. For optional items, refer to the specification sheets and installation drawings of the respective accessories. 2. Acsceelsescoterdie sfr womith a tmhoe nags ttehrei sfko lmloawrkin (g* )ty aprees 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 • Seat chamfered flange • With drain plug • Double gland • Oil/water free treatment • Copper free treatment • Stainless steel (SUS304) atmospheric-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 Performance Rated Cv value Refer to Table 3 and 4. Flow characteristics Inherent rangeability 50 : 1 (Optional 75 : 1) Allowable differential pressure Refer to Table 5 and 6. (temperature range: -196 to 230°C) Refer to Table 7 and 8. (temperature range: 230 to 360°C) Leakage specification IEC 534-4-1986 an d JIS B2007-1993. Class IV: Leakage less than 0.01% Hysteresis error Without positioner: Within 3% F.S. With positioner: Within 1% F.S. Linearity Without positioner: Within ± 5% F.S. With positioner: Within ± 1% F.S. Note) When positioner is not provided, operating performance may vary depending on type of packing used. Dimensions Refer to Figure 4, Table 9 and Table 10. Weight Refer to Table 11. Actuator orientation Refer to Figure 5. Finish Blue (Munsell 10B5/10) or silver, or their specified colors.