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Piping
Although side inlet piping is provided as standard,
Class 600 towers are adaptable to end inlet piping. This
is an economical method requiring only one riser for each
series of hot water basins, regardless of the number of fan
cells. Cast iron, steel, and reinforced plastic pipe are all
available.
/ Water Distribution System /
Valves
Marley-built flow control valves used on Class 600
towers have proved their reliability in more than 40 years
of service. The oversized valve body effectively dissipates
velocity, providing uniform water distribution. Heavy-duty
cast iron body and stainless steel valve stem assure long
life and low maintenance.
Splash Boxes
Each flow control valve discharges into a splash box
located in the hot water basin. The lower box delivers
water to the hot water basin both through slots in the
bottom and by overflow. The cover box dissipates
directional velocity and controls splash.
The open, gravity flow design allows the operator
to vary water rates over a wide range while maintaining
uniform water distribution to the fill—a prerequisite for
reliable thermal performance. Open distribution allows
easy access for quick, inexpensive maintenance and
cleaning.
Nozzles
The “spiral target nozzle” metering orifices used in
the hot water basins are specially designed to deliver the
required water rate and are highly resistant to temperature
and weathering damage. The use of “target nozzles” also
provides uniform water distribution throughout the fill area
with no need for a separate diffusion deck.