
1 D 71 en
3
1
GENERAL
1.1
Scope of the manual
This manual provides the essential information about
the use of series D ball valves. For more information on
actuators and other equipment, which are covered only
briefly, please refer to the separate manuals on their
installation, use and maintenance.
1.2
Valve description
Series D valves are flanged ball valves. The body con-
sists of two symmetrical parts which are attached to
each other with screws. The ball and stem are of one
piece. Large low-friction bearings ensure reliability and
long maintenance intervals. The valves have spring-
loaded seats which are either soft or made of metal.
The valves can be used for shut-off and control appli-
cations.
1.3
Valve markings
The body markings are cast or stamped on the body
side. The identification plate (Fig. 2) is attached to the
valve flange.
The identification plate has the following markings:
1.
Body material
2.
Ball material
3.
Stem material
4.
Seat material
5.
Maximum operating temperature
6.
Minimum operating temperature
7.
Maximum shut-off pressure differential
8.
Type code
9.
Number of the list of valve manufacturing parts
10.
Pressure class
1.4
Technical specifications
Face-to-face length:
ASME B 16.10, API 6D
Body ratings:
ASME Class 150, 300 and 600
Maximum pressure differential:
see Figures 3 and 4
Temperature range:
see Figures 3 and 4
Flow direction:
single-seated:
upstream
double-seated:
flow direction free
Leakage rate:
metal-seated
ASME Classe V
ISO 5208 leakage rate D, C,
or B
soft-seated
API-598 (1970)
Dimensions:
see Section 11
Weight:
see Section 11
NOTE:
As use of the valve is application-specific, a number
of factors should be taken into account when select-
ing the application. Thus, some of the situations in
which the valves are used are outside the scope of
this manual.
If you have any questions concerning the use or appli-
cation of the valve, contact Metso’s Automation busi-
ness for more information.
Fig. 1
Construction of the D series valve
Fig. 2
Identification plate
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
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