1. Reasonable discharge position: the oil discharge port should be set on the side or top of the equipment and independent of other pipelines, so as to ensure that the wastewater can smoothly flow into the sewer or recovery system.
2. Proper direction of water flow: In order to ensure that dirt and impurities in waste water will not block pipelines or affect the normal operation of equipment, the oil drain should be set in the direction of water flow with appropriate size and angle.
3. The oil drain should have reliable sealing performance and backflow prevention function, and automatically close when it stops to avoid external pollution or environmental impact.