Proof of the sealing function of the filter element seals at the filter frame. Other leaks at the filter element aren't collected. Ususally is only used for filter cassettes. The technoloy is often already replaced by an DEHS tes or DOP test.
Proof of the sealing function of the filter element seals at the filter frame. Other leaks at the filter element aren't collected. Ususally is only used for filter cassettes. The technoloy is often already replaced by an DEHS tes or DOP test.