UNIWORLD Series
M/UNIWORLD-P/E ed. 01 2020
ATTENTION
Ensure the valve was chosen with the seals for the fluid contained in the body unit
(TYPE OF PACKING-SEAL) and also check the unit for substances in the air, the relevant ignition
temperature and compare with the temperature class of the equipment. The ignition temperature of
the gaseous mix must always be higher than the maximum surface temperature. Basically, a safety
margin is considered of 15/20% between the ignition temperature and the marking temperature.
For a cloud of dust, you must know the composition and determine the ignition point, taking into
consideration that a layer can cause an explosion of the cloud above. Therefore, for preventive
purposes, determine the exact composition and the possible layer that could form on the equipment.
The UNIWORLD Series Valves
– “Non-Electrical Equipment” are constructed with non-electrical type protection for
constructional safety “c” – EN 80079-37
TYPE OF PACKING - SEAL
PACKING SEAL - MAINTENANCE-FREE - LOCKED PACKING RING NUT
BELLOWS SEAL
MAINTENANCE-FREE
Valid for Heat Transfer fluids:
STEAM
– OVERHEATED STEAM - WATER – HOT WATER –
OVERHEATED WATER
COMPRESSED AIR AND INERT GASES
Valid for:
DIATHERMIC OIL
HAZARDOUS LIQUIDS
GAS GROUP II ( IIA
– IIB)
ATTENTION
It is the installation technician and/or user’s task to take all the measurements
necessary to insulate the body unit and the bonnet that conduct heat and that determine the
maximum surface temperature.
To determine the type of dust, the maximum surface temperature must be known and
compatible. To prevent ignition of dusty atmospheres, limit the maximum surface
temperature. This must be under the lowest of these two values:
2/3 of the auto-ignition temperature of the cloud of dust considered.
at the auto-ignition temperature of a layer of dust 5mm thick, reduced by 75 °C.
Also, for dust, regarding the stem exiting the valve body, ensure you have correct blowing or periodic
cleaning, SINCE THE PART CANNOT BE INSULATED.
ATTENTION
The user is responsible for checking the packing seal. When the BELLOWS SEAL is
used for GAS GROUP II, as soon as its breakage is determined, the packing will only work as an
emergency seal for a few hours, THEREFORE SECTION AND REPLACE THE VALVE.
