Regarding the material of the salt water pump
Thread Content
Our company is currently using freezing systems with temperatures of 0°C, +5°C, -15°C, and -35°C. The salt water pumps used are made of stainless steel and carbon steel. Carbon steel, over time, will experience corrosion, while stainless steel is more expensive. However, it is still unknown whether there will be corrosion caused by Cl ions. Currently, a new factory is under construction, with a new refrigeration system being installed. I hope everyone can give me some suggestions regarding the material.
1. Choose a fluoroplastic pump when the pressure conditions are suitable. 2. The casing is made of cast iron, and the impeller is made of naval copper. 3. Carbon steel pump, with internal protection against Cl ions corrosion and a painted coating.
Fluoroplastic alloy pumps can be used; there is no risk of chloride corrosion, and their prices are not high anymore!
The salt water pumps we use are all iron pumps; they have not shown any signs of corrosion after over 10 years of use, so IS-type single-stage centrifugal pumps are used. Remind the building owner to be careful; if corrosive substances from the equipment leak into the saltwater, it can cause corrosion of the pumps.
Non-austenitic stainless steel materials can be used
When choosing materials, attention should also be paid to the cost. :lol :lol
Why is saltwater used as chilled water? With chilled water using mixed ethylene glycol, there is no issue of corrosion.
Ordinary carbon steel is sufficient; our company has been using it for 5 years without any corrosion occurring in the pump body, even with calcium chloride-based chilled brine
THANK YOU VERY MUCH!!
Using HTB’s ceramic pumps or glass-steel pumps yields ideal results