To reduce the axial face contact force which allows to seal high pressures, i.e. up to 3000 psig with one set of faces.
It is the ratio (k) of 2 geometric areas: the closing (Ah) and opening area (Ac)
For unbalanced seals k = 1
For balanced seals k = 1
Shaanxi DaoLin Mechanical & Electrical Co.,Ltd
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