WATSON MARLOW
Developed and tested by Bredel in conjunction with expert metallurgists, DuCoNite is a three step metallic
surface treatment process with proven excellent chemical resistance to a myriad of chemicals, including many
of the common aggressive fluids pumped by hose pumps around the globe:
DuCoNite
®
Chemical Duty Protection
Solids Handling
A producer of polycarbonate resin pellets, was experiencing
problems pumping effluent. The strips had become trapped
in the double-diaphragm pump the company was using to
transport the effluent to a filter press.
Constantly blocked, the diaphragm pump was, in effect,
acting as a filter. The Bredel hose pump now transfers the
effluent easily, virtually eliminating downtime. It has also
improved the effectiveness of the filter press by as much
as 35 times.
For dimensional drawings, please see pages 8-11.
Chemical
Concentration
Fluid Temp
Resistance
Sodium Hypochlorite
up to 18%
70-122F
A
Sodium Bisulfite
38%
70-122F
A
Ferric Chloride
up to 50%
70-122F
A
Ferrous Chloride
35%
70-122F
A
Alum
50%
70-122F
A
Hydrofluosilicic Acid
18-24%
70-122F
B
Sodium Hydroxide
20-50%
70-122F
A
Potassium Permanganate
50%
70-122F
A
Aqueous Ammonia
20%
70-122F
B
Sulfuric Acid
93-97%
70-122F
A
Citric Acid
50%
70-122F
A
Zincorthophosphate
25%
70-122F
A
Phosphoric Acid
50%
70-122F
A
Nitric Acid
25%
70-122F
A
Chemical compatibility
A = Good
B = Limited
15