Automatic Oil Separator

An automatic oil separator is a device that uses gravity (and sometimes a coalescing filter) to separate oil and other contaminants lighter than water from liquids such as wastewater or air containing oil mist. This term primarily covers two types: oil-water separators used for wastewater treatment and oil-air separators used in compressed air or refrigeration systems. The "automatic" feature generally describes how the device removes the separated oil without human intervention, such as by using an automatic drain or shut-off mechanism to prevent spills.

Common Types and Applications

Oil-Water Separator (Wastewater)

• Function: Separates spilled oil, grease, and other light hydrocarbon liquids from water in locations such as car washes, service stations, and parking garages.

• Mechanism: Relies on gravity and a coalescing filter to capture and remove the oil, with an automatic shut-off mechanism to prevent spills.

• Purpose: Protects the environment by preventing contaminated water from entering the drainage system.

Air-Oil Separator (Compressed Air/Refrigeration)

• Function: Removes oil from compressed air or refrigerant gas to improve system performance and prevent equipment damage.

• Mechanism: An oil reservoir with a screen or filter system that separates oil from gas and returns the oil to the compressor or other system components.

• Purpose: Maintains the efficiency and service life of components in compressed air and refrigeration systems.

Key Features of Automatic Oil Separators

1. Gravity Separation: Because oil is less dense than water, it naturally rises to the surface, making it easier to collect.

2. Coalescing Filter: This specialized filter aids the separation process by causing small oil droplets to coalesce into larger droplets.

3. Automatic Drain: A feature of the oil-air separator that automatically drains accumulated water or oil without interrupting system operation.

4. Automatic Shutoff: This prevents oil from overflowing the separator once it reaches capacity, preventing environmental damage.