The Corrugated plate pack is made of many plates closely spaced. Stoke's Law states that a particle falling under the action of gravity (sand) or buoyed up under the action of Archimede's Principle (oil) will accelerate until the frictional drag of the fluid balances the acceleration force, after which it will continue to fall or rise at the constant velocity known as terminal velocity. It matters not whether the particle is moving through fluid or the fluid is moving past the particle as long as the overall fluid system remains in the laminar flow regime. By taking these principles into account, plate packs reduce the overall time it takes for the oil droplet to rise thereby increasing separation efficiency. Plate packs can be utilized in several different configurations as shown in the diagram below. These include downstream, upstream, and crossflow and can be designed for 60 degree or 45 degree inclination. Note: Plate Packs can be supplied in either FRP or S.S. depending on the operating conditions present.