Maxifluss Rotary Globe Valves VETEC Type 82.7

Transcription

1 Maxifluss Rotary Globe Valves VETEC Type 82.7 ANSI version Application Double-eccentric valve for process engineering and industrial applications Valve size NPS 1 to NPS 10 Pressure rating Class 150 and Class 300 Temperatures 148 to 752 F 100 to 400 C Properties Valve body made of carbon steel or stainless carbon steel Seat with metal seal (hard faced or standard) or with soft seal For use with Type R, M or AT Rotary Actuators The valves can be equipped with different accessories, such as positioners, solenoid valves and other accessories according to VDI/VDE Standard version VETEC Type 82.7 Valve in flanged version for ambient temperatures from 148 to 752 F ( 100 to 400 C), Class 150 and Class 300 NPS 1 to NPS 10 Face-to-face dimensions according to EN 558-2, Table 16, Series 36 Options TA-Luft packing/double packing Special materials for body and trim Noise-reducing features Flange version with tongue/groove, male face/female face according to EN RF and RTJ according to ANSI Versions for higher and lower temperatures available on request Fig. 1 VETEC Type 82.7 Maxifluss Rotary Globe Valve with Type R Rotary Actuator and Type 3730 Positioner Further versions VETEC Type 82.7 DIN version (refer to T 9915 EN) VETEC Type 72.4 Rotary globe valve DN 25 to DN 300 in sandwich style (refer to T 9912 EN) Fig. 2 VETEC Type 82.7 Maxifluss Rotary Globe Valve with Type AT Rotary Actuator, handwheel and Type 3730 Positioner Associated Information Sheet for rotary valves Pneumatic actuators T 8200 EN T 9940 EN Edition August 2010 Data Sheet T EN

2 Design and principle of operation The process medium flows through the valve in the direction indicated by the arrow on the body. The flow rate depends on the opening angle of the plug. The shaft bearing is arranged eccentrically. Together with the plug's offset fulcrum, this implements the double-eccentric design of the Maxifluss rotary globe valve. When turning the plug shaft from closed position in opening direction, the double-eccentric design allows the plug to lift off the seat smoothly without initial breakaway torque. The valve is not opened suddenly and shows a stable control response even with small opening angles. The rotary globe valve can be used for both directions of flow. The standard direction of flow for liquids is FTO (medium opens) and FTC (medium closes) for gases and vapors. Using positioners or cam disks, the natural characteristic of the Maxifluss rotary globe valves can be modified to achieve a linear or equal-percentage characteristic. Fail-safe action In combination with the Types R, M or AT Actuators, the valve has two fail-safe actions, which become effective when the valve is relieved of pressure or when the supply air fails: Fail-close (valve CLOSED without supply air) the valve is closed when the supply air fails. Fail-open (valve OPEN without supply air) the valve is opened when the supply air fails. Installation Observe the direction of flow indicated by the arrow on the valve body. Fig. 4 Double-eccentric principle Fig. 5 Direction of flow FTO and FTC K Kv-Wert V /C V in in % Opening Drehwinkel angle in % in % Fig. 6 Natural characteristic K Kv-Wert V /C V in in % Opening Drehwinkel angle in % in % Fig. 7 Equal percentage or linear characteristic Fig. 3 Sectional drawing of Type T EN

3 Table 1 Technical data VETEC Type 82.7 Maxifluss Rotary Globe Valve ANSI version Valve size NPS 1 to NPS 10 Pressure rating, flange Class 150 and Class 300 Max. operating pressure Connection 725 psi 50 bar Flange Flange bore/form ASME B16.5 Face-to-face dimensions EN 558-2, Table 16, Series 36 Seat ring Characteristic Metal seal Soft seal Equal percentage Linear On/off (with cam disk or signal characteristic in the positioner) Rangeability 200:1 Opening angle 75 Medium temperature range Standard version 148 to 752 F 100 to 400 C Leakage class according to ANSI/FCI 70-2 Metal seal Soft seal IV-L1 VI-G1 Table 2 Materials (material numbers according to EN) Body Carbon steel A 216 WCC Stainless carbon steel A 351 CF8M Shaft A 182 F316L Plug /Stellite 6 Trunnion bearing Seat ring Seat holder Seat gasket O-ring on the seat Bearing bushing Packing gland O-ring Screw plug Gasket for screw plug Trunnion bearing seal Packing, hard-faced or Stellite PTFE FPM 80 VR1 /plastic FPM 80 VR1 Graphite/stainless steel/ptfe PTFE/graphite 3 T EN

4 Table 3 Available K VS and C V coefficients Table 3a Version with metal seat ring ( in mm) Valve size NPS 1 1½ Flow rate K VS % C V Seat K VS % C V Seat K VS % C V Seat K VS % C V Seat Table 3b Version with soft seat ring ( in mm) Valve size NPS 1 1½ Flow rate K VS % C V Seat K VS % C V Seat K VS % C V Seat K VS % C V Seat T EN

5 Table 3c C V coefficients for 100 % trim in version with metal seat ring Opening angle NPS ½ Table 3d C V coefficients for 100 % trim in version with soft seat ring Opening angle NPS ½ T EN

6 Dimensional drawings for Table 4 Fig. 8 Dimensions of Type 82.7 Maxifluss Rotary Globe Valve Table 4 Face-to-face dimensions for ANSI valves in Class 150 and Class 300 Valve size NPS 1 1½ Length L Height H1 in mm in mm Table 5 Valve weight without actuator Valve size NPS 1 1½ Weight kg lb T EN

7 Ordering text VETEC Type 82.7 Rotary Globe Valve ANSI version Valve body made of Carbon steel A 216 WCC Stainless carbon steel A 351 CF8M Special material: Valve size NPS Pressure rating Class C V coefficient Connection Flange Seat version Metal seal Soft seal Standard seat Seat with Stellite facing Extended temperature range HT packing Pneumatic actuator Type R M AT Actuator size Bench range Fail-safe action cm² to Fail-close Fail-open bar Accessories Positioner Article code*: Pressure gauge Type 4708 Supply Pressure Regulator Refer to T 8546 EN Type X Service Unit for compressed air treatment and control Refer to T EN Limit switch Article code*: Solenoid valve Article code*: * Refer to the associated data sheets for the article codes of the accessories. 7 T EN

8 Specifications subject to change without notice. SAMSON CONTROLS INC Cedar Boulevard Baytown, Texas USA Phone: Fax: Internet: T EN