According to the total number of springs in the compensation organization can be divided into multi-spring and single-spring mechanical seals. A seal with several springs in the compensation organization is called a multi-spring mechanical seal; The tissue with only one spring is called a single spring mechanical seal. Multi-spring mechanical seal is also known as small spring mechanical seal, this kind of structure radial specification is small, spring factory can change the spring total in the way to change the elastic force, axial force is more symmetrical, suitable for fast mechanical equipment seal, not suitable for selection in the corrosion material. Single spring mechanical seal is also known as large spring mechanical seal, seal structure is relatively simple. Some seal forms also use a spring to transfer torsion. Domestic seal using large spring teaching more, but can not be used quickly.

Single spring corrosion resistance, dirt crystals on the spring characteristics is small, but the pressure is not symmetrical, the journal is more prominent when the speed ratio is large, centripetal force caused by spring deformation, so the single spring load is small, the journal is small (generally not more than 80-150mm), there is the condition of etch material. More spring than pressure symmetry, spring manufacturers and will not be harmed by the axle diameter, poor corrosion resistance, more sensitive to dirt crystals, with a large axle diameter, heavy load standard.