Marley
/
MH
Fluid Cooler
/
Specifications: Base
Specifications
Specification Value
12
disinterested third party in accordance
with CTI or ASME standards during
the first year of operation; and if the
tower fails to perform within the limits
of test tolerance; then the fluid cooler
manufacturer will pay for the cost of
the test and will make such corrections
as are appropriate and agreeable to the
owner to compensate for the perfor-
mance deficiency.
4.0
Coil:
4.1
Coil(s) shall consist of fully welded box
headers with serpentine coils and hot-dip
galvanized after fabrication. Coils shall
be tested to 400 psi(2757 kPa) air pres-
sure while immersed in water. Maximum
operating design pressure shall be 225
psi(1551 kPa). The coil shall be designed
for free drainages of fluid at shutdown.
5.0
Design Loading:
5.1
The structure and anchorage shall be
designed to withstand a wind load of
20 psf (960 Pa) on single-flow models
and 30 psf (1440 Pa) on double-flow
models, as well as .4g seismic load
while operating. The fluid cooler shall
be designed to withstand shipping and
hoisting loads of 2g horizontal or 3g
vertical. The fan deck and hot water
basin covers on double-flow models
shall be designed for 50 psf(2.42 kPa)
live load or a 200 lb(91 kg) concen-
trated load. Handrails, where specified,
shall be capable of withstanding a 200
lb(890N) concentrated live load in any
direction, and shall be designed in
accordance with OSHA guidelines.
6.0
Construction:
6.1
Except where otherwise specified, all
components of the fluid cooler shall
be fabricated of heavy-gauge steel,
protected against corrosion by G-235
galvanizing. After passivation of the
galvanized steel (8 weeks at pH 7-8,
and calcium hardness and alkalinity at
100-300 ppm each), the fluid cooler
shall be capable of withstanding water
having a pH of 6.5 to 9.0; a chloride
content up to 500 ppm as NaCl (300
Q
The MH Fluid Cooler coil
is suitable for cooling
water, oils, and other
fluids compatible with
carbon steel in a closed,
pressurized system. Each
coil is constructed of all-
prime surface, continu-
ous steel tubing, formed
into a serpentine shape
and welded into an
assembly. The complete
assembly is then hot-
dip galvanized after fabrication. Design pressure is 225 psig, and
each coil is tested to 400 psig air pressure under water. Tubes are
sloped to provide free drainage when vented.
Q
The indicated design values are the minimum allowables under
accepted design standards. They give you assurance that the
fluid cooler can be shipped, handled, hoisted—and ultimately
operated in a normal cooling tower environment. Most MH Fluid
Cooler models will withstand significantly higher wind and seis-
mic loads. If your geographic location dictates higher wind load
or seismic load values, please make the appropriate changes,
after discussion with your Marley sales representative.
Q
In the history of fluid coolers, no other coating for carbon steel
has exhibited the success and longevity of galvanization in
exposure to the normal cooling tower water quality defined at
left. No paints or electrostatically-applied coatings, however
exotic they may be, can approach galvanization's history of suc-
cess.
If extended longevity of the fluid cooler is required—or unusu-
ally harsh operating conditions are expected—consider specify-
ing stainless steel as either the base construction material, or
the material utilized for specific components of your choice. See
Stainless Steel Options on page 12.
¬
MULTICHILL Refrigeration Products
SPX Cooling Technologies - Marley Cooling Towers
Cooke Industries - Phone: +64-9-579 2185 Fax: +64-9-579 2181 Email: [email protected] Web: www.cookeindustries.co.nz
