SPX Cooling Technologies Marley Reflex RTM Leaflet

Having designed and manufactured 
cooling tower fan cylinders since the 
1930s, Marley began producing FRP 
(fiberglass) fan cylinders in 1958, which 
quickly became the accepted standard 
within two years’ time. With considerable 
modeling and full scale testing, this 
experience led to the development of 
several new fan cylinder designs for a 
variety of tower types and fan sizes. One 
such development resulted in the Reflex 
velocity recovery cylinder in the 1980s, 
and is the standard design still in use 
today for 10’ diameter and larger fans.

21st century manufacturing technology 
has enabled further advancement and 
the introduction of the new Marley Reflex 
RTM industrial fan cylinder, offering a 
more dimensionally accurate, high quality 
surface finish, better fit and robust 
structural integrity. A light RTM (resin 
transfer molding) closed-molding process 
lends itself to increased durability for 
the final product, and ensures laminate 
thickness and weight consistency. 
Because the cavities are infused using 
rigid forms in the ribs, there is no porosity 
or potential sites for delamination or 
structural fracture to begin. Therefore, the 
cylinder load capacity is greatly enhanced.

The “green” benefit of the closed-molding 
process is the virtual elimination of VOC 
emissions because the resin is injected 
and cured in a sealed, closed mold. And 
because the lay-up process is now dry, a 
more precise laminate can be achieved, 
with no hand-working of resin-soaked 
materials, no cleaning requirements for 
application equipment, no hand tools using 
hazardous chemicals and no chemical 
disposal concerns.