Dairy and beverage plants wash down constantly, and the effluent that reaches the pit is quietly hard on equipment: acidic and caustic CIP chemicals, sugars, milk solids, plus the odd glove, cap or piece of packaging. Cast iron pits itself in that environment; you want stainless in contact with it.
The 65WQ25-15-2.2S is precision-cast in SS304 throughout, sized at a practical 25 m³/h and 15 m head on 2.2 kW through a 65 mm outlet. The stainless wetted path takes the swings between acidic and caustic wash cycles, while the 48 HRC alloy cutter deals with the packaging and solids so the line stays clear. Because it’s precision-cast rather than fabricated, the surfaces are smooth and easy to keep clean — which matters where hygiene is audited.
If your wash-down chemistry would rust an ordinary pump within a season, this is the class to specify. Ask about the stainless GNWQ-S range at https://www.haquanpump.com/contact.