Flo Fab S Series Manuel d'utilisation, d'entretien et d'installation - Page 7

Parcourez en ligne ou téléchargez le pdf Manuel d'utilisation, d'entretien et d'installation pour {nom_de_la_catégorie} Flo Fab S Series. Flo Fab S Series 9 pages.

Imprimer la page

SINCE 1981

Under no circumstances should there be pulsating of fluids, as this causes vibrations that could

damage the structural integrity of the heat exchanger. The system should be designed to prevent

the unit from encountering pressure shocks and rapid temperature changes.

VIII. MAINTENANCE

CLEANING

Clean heat exchangers subject to fouling (scale buildup, sludge deposits, hard water deposits,

tarnishes, etc.) periodically, depending on operating conditions. Fouling in the unit can result

in increased pressure drops, low temperature differential in the heated medium, or a higher

exit temperature on the heating medium side.

To clean or inspect the tubes, it may be necessary to remove the tube bundle from the shell.

When removing the tube bundle, ensure that there is no damage due to improper handling:

The weight of the tube bundle should not be supported by

individual tubes, but should be carried by the tubesheet, support or baffle plates.

Do not handle the tube bundle with hooks or other tools that can damage the tubes.

To withdraw the tube bundle, pass rods through two or more of the tubes and take the

load on the tubesheet, or alternatively, thread a steel cable through one tube and

return through another tube.

Lift tube bundles horizontally by means of a cradle formed by bending a light-gauge

plate into a u-shape.

Do not drag the bundles, as this may cause damage to the tubes and baffles.

Cleansing of the heat exchanger can be done without removing the tube bundles or the unit

from the system, although extra connections and bypasses would be required.

The cleaning solutions are readily assessable at businesses carrying chemical cleaning agents

for heat exchangers or tubing and piping applications. As a guideline to purchasing the cleaning

solutions, check for the following product data:

compatibility with the material of construction (steel, stainless steel, copper, etc.)

acceptable for use in food processing industries (if applicable)

effectively removes scale, slag, tarnishes, and hard water deposits

easily rinsed out of the system

no objectionable or corrosive fumes

The following fluids are prohibited for use as a flushing agent!!

Hydrochloric acid up to 0.1 % concentration

Solutions that contain MCI

Chlorides (MgCh, NaCl behveen 0.01-1 %, Cu Cl up to 1 %, CaClz from 5% to

saturation)

Any fluid that will deposit alkaline residue or phosphorous

I.O.M - HEAT EXCHANGERS : SHELL & TUBE, S/W