Data Sheet Rotary Plug Valve Type 73.7 Double eccentric control valve for process engineering and industrial applications. Valve size Nominal pressure Valve body made of   Cast/carbon steel or Stainless cast/carbon steel Metal sealing, armored or unarmored The valves can be equipped with different accessories, such as positioners, solenoid valves and other accessories according to VDI/VDE 3845. Standard version For temperatures from –100 to 400 °C (–148 to 752 °F) Version Fig. 1: Flanged version     VETEC Type 73.7 Rotary Plug Valve (example with mounted Type R Actuator) DN 25, PN 63 to PN 160, face-to-face dimensions acc. to EN 558, Table 8, Series 2 DN 40 to DN 500, PN 63 to PN 160, face-to-face dimensions acc. to EN 558, Table 3, Series 15 NPS 1, Class 600, face-to-face dimensions acc. to EN 558, Table 17, Series 39 NPS 1½ to NPS 20, Class 600 to Class 900, face-toface dimensions acc. to EN 558, Table 3, Series 15 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 1092-1 RF and RTJ according to ANSI Versions for higher and lower temperatures on request Fig. 2:

Principle of operation The shaft/plug arrangement is eccentric (Figs. 3 and 4). The double-eccentric design of the rotary plug valve is achieved in combination with the offset of the plug's pivot. 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 plug valve can be used for both directions of flow. Fig. 3: Double-eccentric principle For gases and vapors, the...

Table 1: Technical data Valve size Flange pressure rating Overall length Flange bore/form Seat ring Equal percentage or linear (using cam disk or positioner characteristic) On/off valve Temperature range Opening angle

Table 3. Kvs and Cv coefficients 3a. seat with metal sealing FTO

Order specifications:

VETEC Ventiltechnik GmbH Siemensstraße 12 · 67346 Speyer Telefon: 06232 6412-0 · Fax: 06232 42479 · E-mail: [email protected] · Internet: www.vetec.de Sitz der Gesellschaft: 67346 Speyer · Registergericht: Amtsgericht Ludwigshafen HRB 51677 · USt-IdNr.: DE149689913 · Geschäftsführer: Uwe Vogel