Metso M07, Инструкция по установке, обслуживанию и эксплуатации

Страница: 3 / 24

1 GENERAL
1.1 Scope of the manual
This installation, operation and maintenance manual provides
essential information on M-series ball valves. The actuators and
instrumentation to be used with M-series valves are also dis-
cussed briefly. Refer to the separate actuator and control equip-
ment instruction manuals for further information.
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 installing, using or servicing the valve.
If you are uncertain about the use of the valve or its suitability for
your intended use, please contact Metso Automation for more
information.
1.2 Valve description
M-series valves are flanged full bore ball valves. The valve body
is in two parts, fastened together by body-joint bolting. In sizes
DN 25-40, 65 the valve body is in one part; the ball and the seats
are fastened behind a screw-on insert
The ball and stem are separate. Stem blow-out is prevented by
a shoulder machined on the stem.
The valve is either soft or metal seated. Stem torque is transmit-
ted to the ball through a spline driver installed in a groove on
the ball surface. In sizes DN 25-40, 65 the stem is installed straight
into a groove on the ball surface.
The valve is tight in both flow directions. Tightness is provided
by a pressure differential which forces the ball up against the
downstream seat.
Construction details of individual valves are included in the type
code shown on the valve identification plate. To interpret the
type code, please refer to the type coding key in this manual.
M-series valves are specially designed for demanding shut-off
applications involving high operation cycles. They can also be
used in flow control applications.
1.3 Markings
Body markings are cast or stamped on the body (see Fig. 3).
The identification plate (Fig. 4) is attached to the flange.
Identification plate markings are:
1.
Body material
2. Shaft material
3. Trim material
4. Seat material
5. Max and min operating temperature
6. Max shut-off pressure differential / temperature
7. Pressure class
8. Type designation
9. Valve manufacturing parts list no.
10. Model
Fig. 1. Construction of an M series, sizes DN 25-40, 65
Fig. 2. Construction of an M series, sizes, sizes DN 50-400
ID plate
N-J mark,
body material
Nominal size,
pressure rating
Body
material
Batch no.
Fig. 3. Valve markings
(1) (2) (5)
(8)
(9) (3) (4) (6) (10)
(7)
Fig. 4. Identification plate
3
BODY
TRIM
SHAFT
SEAT
T max
T min
MAX. OPER. ps
at
RATING TYPE
No. MOD
ATTENTION : READ INSTRUCTIONS BEFORE INSTALLATION OR SERVICING. CONTACT METSO AUTOMATION FOR COPY.
MADE BY METSO AUTOMATION
0045