Masoneilan 84003 Series SteamForm Installation Guide | 11
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Orientation
The proper orientation of the SteamForm valve is
important to ensure efficient vaporization and mixing
of the spray water. For best results, the recommended
orientation is to install the valve with a horizontal inlet
and a vertical flow down outlet, as shown in Figure 6.
In this orientation, the vertical run of outlet pipe assists
in mixing of the spray water by creating a flow path that
is parallel to gravitational flow direction that the water is
naturally pulled towards. This parallel direction assists by
suspending the water within the steam flow while heat
transfer is taking place and the water is evaporating.
On the contrary, in a horizontal outlet flow path heavier
water droplets are encouraged by gravity to fallout of the
steam flow and run along the bottom of the pipe. This
results in flooding of the downstream steam lines and
poor temperature control. This is particularly important
for applications that need a wide range of turndown
capability, as low velocity steam flows cannot maintain
enough momentum to properly suspend the water during
this process.
When determining the orientation, it is important to
address future maintenance considerations and the
effects of condensate build up. If the SteamForm is
mounted with a vertical flow up outlet as shown in Figure
7, the removal of trim and maintenance on the valve
becomes extremely difficult. Another drawback is, the
SteamForm valve body now acts as a condensate trap,
being that the valve body is the low point of this system.
Water fallout, in this system, becomes detrimental to the
long-term success of the valve as water build-up occurs
inside the trim and results in premature erosion.
Figure 6:
RECOMMENDED ORIENTATION
of the SteamForm
Figure 7:
IMPROPER ORIENTATION
of the SteamForm
CAUTION:
Orientation not
recommended
