Double seal, compact design, balanced, depending on the direction of rotation of the shaft, multi-spring. The BPD seal requires the use of a drilling fluid or barrier fluid installation. Sealing to EN ISO 21049 (API 682): Type A, Category 2 or 3, System 2 or 3, Configuration 2CW-CW or 3CW-FB.
Double mechanical seal designed for use with contaminated solids, especially crude oil, contaminated hydrocarbons.
The BUV seal requires the use of auxiliary systems in accordance with API 682 (EN ISO 21049).