Metso Finetrol - GENERAL; 1.1 Scope of the manual; 1.2 Valve construction; 1.3 Valve markings

5 FT 70 en 3
1 GENERAL
1.1 Scope of the manual
This manual provides essential information for users of Fin-
etrol® eccentric rotary plug control valves. If you need fur-
ther information on actuators and other accessories, please
refer to the individual manuals on their installation, opera-
tion and maintenance.
1.2 Valve construction
The Finetrol eccentric rotary plug control valve is flanged
(ASME 150-600, PN 10-100) or wafer (ASME 150-600). The
valve has one-piece body. The plug’s seat is attached to the
port using a flat-thread fitting which has some play; this is
also used to adjust the seat. The valve is tight in both flow
directions. The tightness derives from surface pressure
between the plug and seat; pressure arises when the offset
plug rotates against the seat. The valve is metal seated.
Stem blow-out is prevented by a shoulder machined on the
stem and resting on the bonnet. The low capacity version
has it’s own, a different construction.
The valve is designed for control applications requiring
high precision.
1.3 Valve markings
The valve has an identification plate.
A manufacturing number specific to each valve has been
stamped on the side of the actuator plane.
The identification plate is normally located in the spherical
area (outer diameter) of the pipe flange on the stem side,
opposite to the seat. When using a small identification plate
with a small size valve, the plate is installed to the valve
body neck.
Identification plate markings:
1. Body material
2. Stem material / Shaft material
3. Plug material
4. Seat material
5. Maximum and minimum operating temperatures
6. Maximum differential shut-off pressure/temperature
7. Pressure class
8. Type designation
9. Valve manufacturing parts list no.
10. Model
NOTE:
Selection and use of the valve in a specific application
requires close consideration of many different aspects.
Due to the nature of the product, this manual cannot
cover all the individual situations that may occur when the
valve is used.
If you are uncertain about use of the valve or its suitability
for your intended purpose, please contact Metso for more
information.
Fig. 1 Finetrol FC
Identification plate
in small valve sizes
Identification plate
Fig. 2 Finetrol FL assembly
Fig. 3 Identification plate
(1) (2) (5) (7) (8)
(3)
(4)
(6) (9)
(10)