Rotary Systems’ 030-Series coolant rotary unions are ideal fits for machine tool coolant or MQL (Minimum Quantity Lubricant) applications. These coolant rotary unions feature balanced Silicon Carbide mechanical seals and match-ground deep groove radial contact ball bearings with labyrinth bearing protection. Max. Coolant Pressure 1,000 PSI Max. Temperature 250° F Max. RPM 12,000