What is the purpose of a seal flush?

• A. Increases seal wear
• B. Reduces cooling
• C. Inhibits lubrication
• D. Keeps the seal clean, cool and lubricated

Answer: (D)

Seal flush provides a controlled flow of fluid around the seal to carry away heat, wash away contaminants, and supply lubrication to the seal faces. This keeps the seal surfaces clean, cool, and lubricated, reducing friction and wear and helping maintain a tight, reliable seal. Options that mention increased wear, reduced cooling, or inhibited lubrication describe outcomes opposite to what flush achieves, so they don’t fit the purpose.