The Triangular Spiral Ring, also known as Fenske spiral, it is made of wound wire. Fenske spiral is similar to its shape and springs, also known as the triangle spring filler. It is the difference between the spring winding circle is not round but each triangle,  between circle and circle triangle stagger certain angle, therefore, from the end face direction looked that is a polygonal. Fenske Spiral has high separation efficiency, but compares with the θ ring, the resistance is bigger, mainly uses in the laboratory.

Material: SS304, SS316L; Copper