Hydrocyclones are an efficient system to separate sand from water. They can for example be used to protect plate heat exchangers on borehole water. As they work without any moving parts, they have a maximum reliability.
Stainless steel HN / HNC models are designed for long service life without the rust problems that steel hydrocyclones encounter. They are cylindrical or conical depending on the size. The vertical position of the tank makes drain easier.