Watson-Marlow DuCoNite 25 - Manual (Page 56)

SPECIFICATIONS
56
10.1.3 Surface treatment
Pump head
The main pump head parts (pump housing, cover and rotor) are provided with a special
DuCoNite
®
coating, which is both chemical and wear resistant. For the chemical
resistance chart refer to § 10.1.4 .
Gearbox-electric motor
After surface preparation, one layer of 2 component acrylate is used for surface
protection. The standard colour is RAL 9005. Contact your Bredel representative for
details on surface treatment.
10.1.4 Chemical resistance chart DuCoNite
®
coating
Chemical Concentration Chemical com-
patibility with
DuCoNite
®
Hose material
Sodium Hypochlorite up to 18% good EPDM
Sodium Bisulphate 38% good EPDM
Ferric Chloride up to 50% good EPDM
Ferrous Chloride 35% good EPDM
Alum 50% good EPDM
Polymer good EPDM
Fluoride (Hydrofluorosilicic
Acid) 18-24% limited EPDM
Sodium Hydroxide 20-50% good EPDM
Potassium Permanganate 50% good EPDM
Potassium Hydroxide up to 70% good EPDM
Aqueous Ammonia 20% limited EPDM
Methanol good EPDM
Sulfuric Acid 93-97% good CSM
Peroxide 50% good CSM
Citric Acid 50% good EPDM
Zinc Orthophosphate 25% good EPDM