DATA SHEET TY005.029 Rotary Plug Valve - VETEC Type 62.7 TY005.029 Revision 0 1 2 3 4 5 6 7 8 Page 1 of 12 Created F. Thiede Created -/- fth fth fth fth Approved P. Konzack Approved -/- pko pko pko fn Date 14.10.2015 Date 14.10.15 04.11.15 03.02.16 21.08.18 22.07.19 Valve Size NPS 1 to 8 ANSI Pressure Class CL 150 and 300 Temperature Range of Medium -76°F to +248°F (-60°C to +120°C) for vapor and gaseous medium -76°F to +392°F (-60°C to +200°C) for liquid medium Valve Body Material Cast carbon steel Low temperature carbon steel Cast stainless steel Seat Version Metal sealing Soft sealing Standard Version For ambient air temperatures from: -4°F to 158°F (-20°C to +70°C) Low Temperature Version For ambient air temperatures from: -67°F to 176°F (-55°C to 80°C) Flanged Version NPS 1 to 8, Class 150/300, face to face dimensions acc. to ANSI / ISA 75.08.02 Version acc. to DIN Standards also available The valves can be equipped with different accessories, such as positioners, solenoid valves and other accessories. Fig.1 VETEC Type 62.7 with Type AT Actuator Fig.2 VETEC Type 62.7 Sectional Drawing
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DATA SHEET TY005.029 Rotary Plug Valve - VETEC Type 62 · DATA SHEET TY005.029 Rotary Plug Valve - VETEC Type 62.7 TY005.029 Revision 04 Page 2 of 12 Principle of Operation Rotating
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DATA SHEET TY005.029
Rotary Plug Valve - VETEC Type 62.7
TY005.029 Revision 0 1 2 3 4 5 6 7 8
Page 1 of 12 Created F. Thiede Created -/- fth fth fth fth
Approved P. Konzack Approved -/- pko pko pko fn
Date 14.10.2015 Date 14.10.15 04.11.15 03.02.16 21.08.18 22.07.19
Valve Size NPS 1 to 8
ANSI Pressure Class CL 150 and 300
Temperature Range of Medium
-76°F to +248°F (-60°C to +120°C) for vapor and gaseous medium
-76°F to +392°F (-60°C to +200°C) for liquid medium
Valve Body Material
Cast carbon steel Low temperature carbon steel Cast stainless steel
Seat Version
Metal sealing Soft sealing
Standard Version
For ambient air temperatures from: -4°F to 158°F (-20°C to +70°C)
Low Temperature Version
For ambient air temperatures from: -67°F to 176°F (-55°C to 80°C)
Flanged Version
NPS 1 to 8, Class 150/300, face to facedimensions acc. to ANSI / ISA 75.08.02
Version acc. to DIN Standards alsoavailable
The valves can be equipped with different accessories, such as positioners, solenoid valves and other accessories.
Fig.1 VETEC Type 62.7 with Type AT Actuator
Fig.2 VETEC Type 62.7 Sectional Drawing
DATA SHEET TY005.029
Rotary Plug Valve - VETEC Type 62.7
TY005.029 Revision 04 Page 2 of 12
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.3/4). 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 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 for following flow direction (fig.5):
FTO = flow to open (for metal sealing) - FTC
on request
FTC = flow to close (for soft sealing)
Fig.3 Double-Eccentric Principle
Fig.4 Double-Eccentric Principle
Fig.5 Example of Marking the Flow Direction
DATA SHEET TY005.029
Rotary Plug Valve - VETEC Type 62.7
TY005.029 Revision 04 Page 3 of 12
An arrow on the valve will indicate the direction of flow the valve has been configured for (fig.6)
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.
The rotary plug valve has an inherent characteristic (fig. 7); however, a cam disc or positioner may be used to achieve an equal percentage or linear characteristic (fig. 8)