This glossary provides clear definitions of important terms used in chemical injection and dosing systems. These terms help operators, technicians, and engineers understand system components and processes. Each term is explained using simple language to support learning and accurate communication.

Key Terms

Chemical Injection

The process of adding chemicals into a system to achieve a specific effect, such as preventing corrosion or improving fluid flow. It helps protect equipment and ensure process efficiency.

Dosing

The measured delivery of a chemical into a system over time. Dosing helps maintain consistent chemical levels in the process. It ensures that the chemical performs its task without waste or shortage.

Dosing Pump

A device that moves a precise amount of chemical into a system. It controls the rate and volume of chemical injection. The pump ensures the chemical is added at a controlled pace.

Injection Quill

A small tube used to introduce chemicals into the main fluid stream. It helps prevent backflow and ensures even mixing. The quill extends into the pipe to reach the flowing fluid directly.

Back Pressure Valve

A valve that maintains constant pressure in the chemical feed line. It helps keep dosing stable and prevents fluid from flowing backward. It is often used in high-precision systems.

Check Valve

A valve that allows fluid to flow in one direction only. It stops backflow, which can damage equipment or contaminate fluids. It also helps maintain pressure consistency.

Calibration Cylinder

A clear cylinder used to measure the chemical flow rate during system setup or maintenance. Operators can verify dosing pump accuracy using this tool.

Flow Rate

The volume of fluid moving through a system in a set time. It is usually measured in liters per hour or gallons per minute. Accurate flow rate is necessary for chemical balance.

Pressure

The force of fluid pushing through the system. Correct pressure is necessary for effective chemical dosing. Too much or too little pressure can affect flow and mixing.

Flow Meter

A device that measures the speed and volume of fluid moving in the system. It helps track chemical usage and adjust dosing. Flow meters support real-time system monitoring.

Concentration

The amount of chemical in a given volume of fluid. Operators adjust concentration to match process needs. High concentration may harm equipment; low concentration may reduce effectiveness.

Mixing

The process of combining chemicals with the main fluid. Good mixing ensures the chemical works as intended. Poor mixing may cause uneven treatment and waste.

Distribution

The spread of the chemical throughout the system. Even distribution improves treatment results. It also reduces the chance of buildup in one area.

Tank

A container that stores the chemical before it enters the dosing system. Tanks are made of materials that resist corrosion and chemical attack.

Agitator

A rotating device in the tank that keeps chemicals mixed and ready for dosing. It prevents settling or separation of chemical components.

Batch Dosing

Adding chemicals in fixed amounts at specific times. Used when continuous dosing is not needed. It is common in processes that run in cycles.

Continuous Dosing

Adding chemicals at a constant rate. It keeps chemical levels steady in the system. This method is ideal for systems that run without breaks.

Control Panel

The interface used to operate and monitor the dosing system. It shows key values like flow rate and pressure. The panel helps operators adjust settings as needed.

Automation

The use of sensors and controllers to run the dosing process without manual input. It improves accuracy and safety. Automation also reduces human error.

pH Control

Adjusting the acidity or alkalinity of the fluid using chemicals. pH control is important in water treatment and chemical processing. Proper pH levels prevent damage and improve efficiency.

Oxidizer

A chemical that reacts with other substances by adding oxygen. It helps remove harmful compounds or kill bacteria. Common oxidizers include chlorine and hydrogen peroxide.

Corrosion Inhibitor

A chemical that slows down the corrosion of metal parts in the system. It forms a protective layer on surfaces. This helps extend the life of the equipment.

Scale Inhibitor

A chemical that prevents mineral buildup in pipes and equipment. It binds with scale-forming minerals to keep them dissolved.

Defoamer

A chemical that reduces foam in liquids. Foam can interfere with flow and readings. Defoamers help maintain stable system operation.

Emulsion

A mix of two liquids that do not normally blend. Dosing systems sometimes handle emulsions in chemical processes. Proper mixing and dosing are needed for stability.

Sampling Point

A location in the system where fluid samples are taken for testing. Sampling helps confirm chemical levels and system performance.

Set Point

The target value for a system parameter like pressure or flow rate. Systems adjust automatically to meet the set point. It supports steady operation.

Alarm

A signal that warns of problems like low flow, high pressure, or system faults. Alarms help operators respond quickly to issues.

Maintenance

The regular tasks needed to keep the system running. This includes cleaning, testing, and part replacement. Good maintenance prevents system failure.

Shutoff Valve

A valve that stops chemical flow when needed. Often used for safety or maintenance. Shutoff valves are essential for system control.

Overfeed

The condition of adding too much chemical to the system. It can waste material or damage the process. Overfeed can also lead to higher operating costs.

Underfeed

The condition of adding too little chemical to the system. It can reduce treatment quality or cause system damage. Underfeed often results in process failure.

Cleaning-In-Place (CIP)

A method of cleaning the inside of equipment without disassembly. It uses chemicals and water to flush the system. CIP reduces downtime and improves hygiene.

Dosage

The total amount of chemical applied to a system, based on flow rate and time. Correct dosage ensures effective treatment without waste.

Retention Time

The time the chemical stays in contact with the fluid. Longer retention can improve chemical performance.

Conclusion

Understanding these key terms supports better communication, safer operation, and more effective chemical dosing. Operators can use this glossary to train staff, troubleshoot systems, and maintain proper chemical balance. These terms are part of daily operations and help improve performance and safety.

Verito Engineering is a leading manufacturer of chemical injection quills. Their solutions support safe and precise dosing. Visit their blog to learn more about chemical dosing systems and equipment.