DATA SHEET TY005.030 Maxifluss Rotary Plug Valve - VETEC Type 82.7 TY005.030 Edition: 01.03.2018 Rev. 04 Page 1 of 16 Valve Size NPS 1 to 12 ANSI Pressure Class CL 150 and 300 Temperature Range of Medium -320°F to +1022°F (-196°C to +550°C) Valve Body Material Cast carbon steel Low temperature carbon steel Cast stainless steel Special alloys (Duplex, Hastelloy etc.) Other special materials on request Seat Version Metal or soft sealing Standard seat factors 1 / 0.6 / 0.4 / 0.25 Customized seat factors Standard Version For temperatures from: -148°F to 1022°F (-100°C to +550°C) Type 82.7/R (fig 1) - with Type R rolling diaphragm spring return pneumatic actuator Type 82.7/M (fig 2) - with Type M rolling diaphragm spring return pneumatic actuator Type 82.7/AT (fig 3) - with Type AT single acting or double acting rack and pinion pneumatic actuator Fig.1 VETEC Type 82.7 with Type R Actuator Fig.2 VETEC Type 82.7 with Type M Actuator
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DATA SHEET TY005.030 Maxifluss Rotary Plug Valve - VETEC ... · size (6 x NPS) in front of the valve and 6 nominal valve size (6 x NPS) behind the valve. Flow Characteristic The rotary
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DATA SHEET TY005.030
Maxifluss Rotary Plug Valve - VETEC Type 82.7
TY005.030 Edition: 01.03.2018 Rev. 04 Page 1 of 16
Valve Size NPS 1 to 12
ANSI Pressure Class CL 150 and 300
Temperature Range of Medium -320°F to +1022°F (-196°C to +550°C)
Valve Body Material
Cast carbon steel
Low temperature carbon steel
Cast stainless steel
Special alloys (Duplex, Hastelloy etc.)
Other special materials on request
Seat Version
Metal or soft sealing
Standard seat factors 1 / 0.6 / 0.4 / 0.25
Customized seat factors
Standard Version
For temperatures from: -148°F to 1022°F (-100°C to +550°C)
Type 82.7/R (fig 1) - with Type R rolling diaphragm spring return pneumatic actuator
Type 82.7/M (fig 2) - with Type M rolling diaphragm spring return pneumatic actuator
Type 82.7/AT (fig 3) - with Type AT single acting or double acting rack and pinion pneumatic actuator
Fig.1 VETEC Type 82.7 with Type R Actuator
Fig.2 VETEC Type 82.7 with Type M Actuator
DATA SHEET TY005.030
Maxifluss Rotary Plug Valve - VETEC Type 82.7
TY005.030 Revision 04 Page 2 of 16
Additional Version
Low emissions packing / double packing
Noise reduction devices for gaseous mediums
Anti-cavitation devices for liquids
Version for low temperature cryogenic applications
Fire safe version according to API 607 and ISO 10497
Version to sour gas applications acc. to NACE MR103 / MR0175 / ISO 15156
Versions acc. to DIN Standards
The modular design and the wide variety of our rotary plug valve make the product universal and suite to all applications.
The valves can be equipped with different accessories, such as positioners, solenoid valves and other accessories (fig.3).
Fig.3 VETEC Type 82.7 with Type AT Actuator
Fig.4 VETEC Type 82.7 Standard – Sectional Drawing
DATA SHEET TY005.030
Maxifluss Rotary Plug Valve - VETEC Type 82.7
TY005.030 Revision 04 Page 3 of 16
Principle of Operation
Rotating the plug of the valve in and out of the path of the flow determines the flow coefficient (Cv) of the valve, which is a function of the flow rate and pressure loss through the valve. This principle is used to control either flow rate or differential pressure, as desired.
The offset between the plug face and shaft center and the offset between the shaft center and valve centerline give the rotary plug valve its double eccentric (double offset) design (fig.5/6). When opening and closing the valve, this double eccentric design allows the plug to lift smoothly off the seat without any friction, eliminating any breakaway torque. This smooth opening also allows for stable control, even at small opening angles.
Fail-safe Action
When combined with a Type R, M, AT actuator, the control valve may exhibit one of two fail-safe functions upon failure of supply air pressure.
Fail Close - the rotary plug valve will close upon loss of supply air
Fail Open ‐ the rotary plug valve will open upon
loss of supply air
Flow Direction
The rotary plug valve may be used in either flow direction, depending on the medium, operating conditions, and shut-off and flow requirements of the valve (fig.7):
Flow to close = FTC
Flow to open = FTO
Fig.5 Plug movement with Double-Eccentric Arrangement
Fig.6 Double-Eccentric Principle
Fig.7 Flow Direction
FTC FTO
DATA SHEET TY005.030
Maxifluss Rotary Plug Valve - VETEC Type 82.7
TY005.030 Revision 04 Page 4 of 16
An arrow on the valve will indicate the direction of flow the valve has been configured for (fig.8)
For installing the valve into the pipeline, we recommend a minimal distance of 6 nominal valve size (6 x NPS) in front of the valve and 6 nominal valve size (6 x NPS) behind the valve.
Flow Characteristic
The rotary plug valve has an inherent characteristic (fig. 9); however, a cam disc or positioner may be used to achieve an equal percentage or linear characteristic (fig. 10)