Collection: Stainless steel

When do you choose a stainless steel pump?

Stainless steel costs more than cast iron or plastic, and that is only justified when the medium or the surroundings call for it. But when they do, it is no luxury: in salt, brackish, iron-rich or chemically loaded water a standard pump deteriorates within a single season, while a stainless version lasts for years.

What to look for

• Which water it is. AISI 304 is adequate for iron-rich groundwater, rainwater and mildly aggressive waste water. For chlorides, salt or acids you need AISI 316; for seawater, titanium comes into the picture.
• Which parts are stainless. Check whether only the pump housing is stainless, or the impeller, the shaft and the fixings as well. A stainless housing with a cast iron impeller only solves half the problem.
• Seals. The materials of the shaft seal and the O-rings often determine the service life sooner than the housing does. Aggressive water calls for a double mechanical seal.
• Weight. Stainless steel is heavier than plastic and lighter than cast iron. That matters for mobile use; for a fixed installation, hardly at all.
• Hygienic applications. For food, drinking water or a medical environment, stainless steel is often a requirement rather than a choice. Ask for the material declaration.

Do you know which substance is in the water? Put it to us under pumps for chemical and aggressive water or call 085 - 210 08 97 — we would rather check material resistance with you and the manufacturer than have you send a pump back.