Metso neles, Installation Maintenance And Operating Instructions

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3 R 74 en 3
1 GENERAL
1.1 Scope of the manual
This manual provides essential information on R series
V-port segment valves, i.e. RA, RE and RE1 valves.
Actuators and other accessories are only discussed
briefly. Refer to the individual manuals for further infor-
mation on their installation, operation and mainte-
nance..
1.2 Valve construction
RA and RE1series valves are V-port segment valves
installed between flanges. RE series valves are flanged
V-port segment valves. The body is in one part; the
shaft and the segment are separate. Shaft blow-out is
prevented by plates mounted against the shaft shoul-
der. See Figs. 1 and 2.
The valve is either soft or metal seated. Tightness
derives from the spring force pressing the seat against
the segment. The structure of the valve supplied may
vary, depending on the customer’s requirements. The
detailed structure is revealed by the type code shown
on the valve identification plate. The type code is
explained in Section 15.
The valve is designed for both control and shut-off
applications.
1.3 Valve markings
Body markings are cast on the body. The valve also has
an identification plate attached to it, see Fig. 3.
Identification plate markings:
1. Body material
2. Shaft material
3. Segment material
4. Seat material
5. Maximum operating temperature
6. Minimum operating temperature
7. Maximum shut-off pressure differential
8. Type designation
9. Valve manufacturing parts list no.
10. Pressure class
NOTE:
Selection and use of the valve in a specific application
requires close consideration of detailed 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 suita-
bility for your intended purpose, please contact
Metso’s Automation business for more information.
Fig. 1 Construction of a V-port segment valve, RA
Fig. 2 Construction of a V-port segment valve,
RE/RE1
Fig. 3 Identification plate
ATTENTION:
TYPE
BODY
No.
SEAT
TRIM
max
ps
min
INSTALLATION OR SERVICING.
t
t
READ INSTRUCTIONS BEFORE
MADE BY
METSO AUTOMATION
XXXX
BODY
TRIM
SHAFT
SEAT
TYPE
RATING
No.
t max.
t min.
ps
ATTENTION: READ INSTRUCTIONS BEFORE INSTALLATION OR SER VICING. CONTACT METSO AUTOMATION FOR COPY.
MADE BY METSO AUTOMATION
XXXX
Sizes 25–80
Sizes
≥
100
(1) (3)
(5) (6) (7)
(4) (9) (8)
(1)
(3)
(5) (6)
(8) (9)
(2) (4) (7) (10)