Materials Used in Marel Equipment
The materials listed here are common in Marel equipment. Use the list to determine the
chemical tolerance of individual parts of the equipment.
NOTE
Specific recommendations on types and strength of solutions used for cleaning or san
itization should, at all times, come from a qualified distributor of cleaning solutions.
Table 1 List of Materials
Material Used in Resistance to detergents
Metals:
Stainless steel Frames, various parts High (in normal conditions, for
example temperatures between
-20 to +30°C/-4 to 86°F )
Aluminum Load cell brackets and spacers, load
cells, pneumatic cylinder ends
Low, to strong base solutions
Plastics:
Polyethylene
(PE)
Guides High
Polycarbonate
(PC)
Displays and keyboards Limited, to strong base solutions
Polypropylene
(PP)
Modular conveyor belts High
Acetyl (POM) Modular conveyor belts High, may develop precipitations
caused by chlorine
Polyvinylchloride
(PVC)
Endless belts of layered PVC and
PUR canvas
Low, especially to minimally
diluted solutions
Polyurethane
(PUR)
Water and Temperature
l Water can contain a significant number of microorganisms. Therefore, inspection of water
used for cleaning should be part of a HACCP plan. All impurities in water can influence the
effectiveness of a detergent or sanitizer.
l Water hardness is the most important chemical property which directly effects cleaning
and sanitizing efficiency. The pH value for normal water ranges from pH 5 to pH 8.5.
l Soils soluble in water are sugars, some starches and most salts.
l Always use clean water for rinsing and cleaning. Never rinse or clean with seawater.
l Rinse with cold water, except when working with fat products. In that case use 40-55 °C
(104-131 °F) hot water to dissolve the fat. Some fats have a melting point below the recom
mended 40-55 °C, so you should adjust the water temperature accordingly.
M3310 HMI Controller User Manual Cleaning
10 160317ENG
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