3
1
GENERAL
1.1
Scope of the manual
This installation, operation and maintenance manual pro-
vides essential information on trunnion mounted XH series
ball valves. The actuators and instrumentation to be used
with these valves are also discussed briefly. Refer to the sep-
arate actuator and control equipment instruction manuals
for further information.
1.2
Valve description
Trunnion mounted XH series valves are flanged full bore ball
valves. The valve body is in two parts, fastened together by
body-joint bolting. The ball and shaft are separate. Shaft
blowout is prevented by bonnet and a shoulder machined
on the shaft, and a retainer ring inside the gland.
The valve is either soft or metal seated. Shaft torque is trans-
mitted to the ball through a splined bore in the ball.
The valve is 1-way or 2-way tight depending on the seat
construction. Tightness direction is shown with an arrow on
1-way valves.
Construction details of individual valves are included in the
type code shown on the valve identification plate. To inter-
pret the type code, please refer to the type coding key in this
manual.
Trunnion mounted XH series ball valves are specially
designed for demanding throttling and shut-off service
with high pressure differentials.
1.3
Markings
Body markings are stamped on the body (see Fig. 2). .
The identification plate (Fig. 3) 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
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 suita-
bility for your intended use, please contact Metso Automa-
tion for more information.
Fig. 1
Construction of a trunnion mounted XH series ball
valve
Fig. 2
Valve markings
Fig. 3
Identification plate
Batch no
Nominal size
pressure rating
ID plate
Manufacturer’s
Body material
Body
material
mark
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 FIELD SYSTEMS FOR COPY.
MADE BY METSO AUTOMATION
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Summary of Contents for NELES XH Series
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