Modentic 3PC, Руководство пользователя

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3. Pressure-Temperature Ratings
The pressure-temperature rating of ball valves
are determined, not only by valve shell
materials, but also by sealing materials used for
ball seats, stem packing, and body seal.
Sealing materials may be high molecule,
elasticity and hardness, however, the choice is
limited by the characteristics of the service fluid,
temperature, pressure, velocity of fluid,
frequency of valves operation and sizes of ball
valves etc. User shall notice the maximum
temperature labeled on the name plate.
Followings are the general rating charts for
non-shock fluid service for floating ball valves
by nominal pressure.
Temp. (°C)
3000PS Bar
-20 to 0 248.2
0 to 50 240.6
50 to 100 211.0
100 to 150 192.5
150 to 200 178.3
200 to 250 166.9
4. Delivery Condition and Storage
Valves stay in the open condition during the
transportation. Valves must store in an indoor
warehouse to avoid dusts and other foreign
object. Do not take off the dust cover except
ready to install immediately.
5. Installation and Operation
5.1 Cleaning
Even the valves was transported under a clean
environment, operator must check is there any
foreign body or dusts inside the bore. If yes,
clean it before installation. Operator clean the
ession air, or steam
eaned only with
water or steam, the compression air is not
allowed.)
5.2 Valve Installation
e system)
a.
quence to do
d close
the valve.
b.
ea. It will cause deformation
c.
lve to the pipeline adequately
a.
ction for opening and
b.
on with the flow
c.
flow direction
ed.
valves by water, compr
(automation valve shall be cl
(Install to the pipelin
Direction
Ball valve does not restrict the flow direction.
Just consider the natural se
opening an
Position
Ball valve can be installed in any position,
but the operator shall consider the load of the
pipe line system not to apply at the
connection ar
and leakage.
Connecting to pipeline
Select the correct specification of pipeline.
Tight the ball va
5.3 Operation
For manual operation, shift the handle in
counter-clockwise dire
clockwise for close.
If the handle is in parallel position with the
flow direction, the valve is open. If the
handle is in right angle positi
direction, the valve is close.
When installing actuator, the user should
ensure the position of the valve whether
open or close. The rectangular shape of the
stem top or the direction mark at the stem
top is in parallel with the
means the valve is open
6. t
a.
Pu into service
After install to the pipeline, it is necessary to
check the function of the product. Thus,
4