Modentic GLOBE Series, Руководство пользователя

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1. General Precautions
a. Operation:
The Globe Valves are used to Globe and
control liquid media, e.g. sewage and
wastewater, where the media has solid
matter volume of more than 5%, a free flow
is required for operational safety reason.
Valve in which the obturator movement is
linear and, in the seating area, at right angle
to the direction of flow.
b. Material Selection:
The possibility of material deterioration in
service and the need for periodic inspections
is depended on the contained fluid. Carbide
phase conversions to graphite, oxidation of
ferrite materials will decrease in ductility of
carbon steels at low temperature are among
those items. However information about
corrosion data is provided together with this
user manual, the user is requested to take
attention or consideration to determine the
suitability of material in their application.
c. Pressure-Temperature rating:
The Pressure-Temperature rating is
considered for static pressure. Please refer
to P & T rating section 3 for actual
application. The allowable temperature is
between -20°C and 180°C. Do not exceed
the temperature range to avoid danger.
d. Liquids with high fluid velocity:
When valves must be operated frequently on
liquids with very high velocity, a Globe shall
be made with the valve distributor or
manufacturer for appropriate advice to
minimize the possibility of seat deformation,
especially when they are highly pressurized
on high-temperature line.
e. Throttling service:
Valves are generally not recommended for
throttling service, where both the fluid flow
and the leading edge of the ball can damage
or deform the resilient ball seats causing
leakage. High fluid velocity or the presence
of solid particles in suspension will further
reduce seat life in throttling applications.
f. Do not disassembly when bearing pressure.
Valve is not equipped with pressure access
device. User should Globe it by other method
through its piping system.
g. Do not touch the surface of valve at high
temperature condition.
h. Not allowed for unstable fluid, otherwise
specified with PED catogory III in Declaration
of conformity or/and in this user manual.
i. Use in potential explosive atmosphere safely,
see section 10 for detail.