Glossary: R

Reciprocator

A machine or device used to perform coating by moving a coating applicator vertically (or horizontally) with a back and forth motion.

Recovered Powder

Powder paint that has been recovered using a recovery system (such as a cyclone collector or bag filter) and can actually be reused.

In most cases, dust and blocking powder are separated and removed from recovered powder using separating equipment (grading or screening devices), prior to powder reuse.

In the electrocoating process, the compartment that contains the anode, which is surrounded by a barrier membrane (ion exchange membrane).

The anolyte membrane cell attracts excess acid (or amine) from the electrocoating paint to an electrode, through a membrane, in order to aid with acid/amine removal.

Recovery Efficiency

When paint is applied via electrostatic powder coating, a recovery system (such as a cyclone collector or bag filter) is utilized, in order to recover excess powder overspray. The recovery efficiency is equivalent to the ratio between the entire amount of powder overspray, versus the actual amount of recoverable and reusable powder. In general, recovery efficiency is expressed in terms of a mass ratio.

Recovery Washing Efficiency

The ratio of the final wash concentration (CB) to the undiluted stock solution (CF)

η = (CB - CF) / CB × 100 (%)

Regenerative Catalytic Oxidizer

A process gas cleansing system that utilizes a regenerative combustion process operating at extremely high thermal efficiencies, due to the presence of a catalyst (exhaust gas treatment equipment).

Acronym: RCO

Regenerative Thermal Oxidizer

A process gas cleansing system that utilizes a regenerative combustion process, which does not operate at extremely high thermal efficiencies, as it does not employ a catalyst (exhaust gas treatment equipment).

Acronym: RTO

Rejection Ratio

When specifying the concentration of solutes before and after passing through the membrane as C1 and C2, the rejection ratio is expressed as the quantity 1 - C2 / C1.

Synonym: Stopping Ratio

Repair Coating, Refinishing

In general, the terms "repair coating and refinishing" refer to a repair coating that is applied to damaged areas. However, these terms are also occasionally used to refer to a recoating of the entire surface.

Retention Time

The time required for the water to pass through the sludge treatment portion of a coating booth system.

<Capacity of treatment system (m3)> / <Quantity of water treated (m3/min)>

Unit: min.

JIS Z 8126

Reverse Osmosis

A process that employs pressure to two solutions separated by a membrane, in order to separate a solvent (or water) from a solute. Reverse osmosis is initiated when a pressure, which exceeds the permeability pressure differential between two solutions separated by a semi-permeable membrane, is applied to the more concentrated of the two solutions. The solution located on the opposite side of the membrane is thereby forced to transfer solvent (or water) to the more dilute solution, in a reversal of the osmotic phenomenon.

Rivetless Chain

A type of chain used in trolley conveyors, particularly for the purpose of transporting heavy loads. Rivetless chain can be assembled without the use of tools, as it does not incorporate rivets.

Roller Conveyor

A product transport conveyor that consists of a series of aligned wheels and rollers.

Synonym: Free Roller Conveyor

Roof Electrode

An electrode that is situated adjacent to the liquid surface in an electrodeposition bath and is used to improve the adhesion of paint to the roof of a vehicle body.