LMI - Chemical Injection Pumps

LMI Pumps: Trusted for Precise Chemical Dosing

LMI is a leader in chemical injection pump technology, offering durable and precise metering solutions for water treatment, industrial processing, and agricultural applications. Known for their rugged, chemically resistant construction and reliable performance in harsh environments, LMI pumps provide accurate dosing through adjustable stroke length and frequency. Their broad compatibility with control systems—including manual, digital, pulse, and 4-20 mA inputs—makes integration seamless for both basic and advanced operations. With global certifications and a range of accessories for full system setup, LMI pumps help users maintain process efficiency, chemical safety, and long-term reliability.

Why Choose LMI Chemical Injection Pumps?

LMI chemical injection pumps are a trusted choice for precise and reliable chemical dosing in water treatment and industrial applications. Known for their durability and corrosion resistance, these pumps are designed to handle harsh chemicals while maintaining consistent flow rates and operational safety. With user-friendly controls, flexible installation options, and robust engineering, LMI pumps help reduce maintenance downtime and ensure compliance with industry standards—making them ideal for professionals seeking efficient and long-lasting chemical injection solutions. Explore these chemical injection pumps at our Canadian warehouse, or check them out below:

LMI Two Dial B Series Chemical Metering Pumps

The LMI Two Dial B Series Chemical Metering Pumps deliver precise and reliable chemical injection for water treatment, offering both standard and chlorine-specific models. Standard pumps are compatible with a wide range of chemicals like citric acid, coagulants, and caustic soda, while chlorine models are specially engineered to handle off-gassing chemicals such as sodium hypochlorite. These pumps feature dual dials for stroke and speed adjustment, a transparent acrylic pump head for visual monitoring, and an automatic return valve in chlorine models to prevent air locking. NSF and cUL certified, they come with a complete installation kit and operate on 120VAC, supporting flow rates from 1.4 to 7.0 GPH and pressures from 30 to 150 PSI, depending on the model.

LMI Two Dial C HI Series Chlorine Metering Pump

The LMI Two Dial C HI Series Chlorine Metering Pump offers precise and reliable chemical dosing for water treatment applications, especially when handling off-gassing chemicals like chlorine. Featuring advanced auto-degassing technology, it prevents air-locking by recirculating gas and chemical back to the tank, ensuring smooth, uninterrupted operation. With dual manual controls for stroke length and speed, and a transparent acrylic pump head for easy monitoring, it provides flexibility, quick diagnostics, and dependable performance. NSF and cUL approved, the C1 HI series includes a complete installation kit and is compatible with various treatment chemicals, making it an efficient, durable, and user-friendly solution.

LMI Electronic B9 HI Series 4-20mA Controllable Chlorine Metering Pumps

The LMI Electronic B9 HI Series 4-20mA Controllable Chlorine Metering Pumps is a smart, programmable solution for precise and reliable chemical dosing in industrial and municipal water treatment systems. Featuring seamless SCADA integration through 4–20 mA Auto mode, it automatically adjusts pump speed to meet process demands. Its anti-airlock valve system effectively handles off-gassing chemicals like chlorine by redirecting trapped gas back to the tank, ensuring uninterrupted flow. With an intuitive LCD, see-through acrylic pump head for easy monitoring, and plug-and-play installation kit, the B9 simplifies operation and maintenance.

FAQs

1. What is the purpose of a chemical injection pump in water treatment systems?

Chemical injection pumps are used to accurately dose chemicals—such as chlorine, acids, or anti-scalants—into water systems for treatment, disinfection, pH control, or corrosion prevention. Their precision ensures consistent water quality, compliance with regulations, and safe operation in both residential and industrial settings.

2. How do I determine the right size chemical injection pump for my application?

Choosing the right size depends on the required flow rate (gallons per hour or day), operating pressure, and chemical concentration. It's important to match the pump’s capacity to your system’s dosing needs without oversizing, as excessive flow may waste chemicals and damage equipment.

3. Can chemical injection pumps handle corrosive or off-gassing chemicals like chlorine?

Yes, many modern chemical injection pumps are designed with corrosion-resistant materials like PVDF or PTFE and include features such as auto-degassing valves to safely handle off-gassing chemicals like chlorine and hydrogen peroxide, preventing airlocks and ensuring continuous operation.

4. What’s the difference between a diaphragm and a peristaltic chemical injection pump?

Diaphragm pumps use a reciprocating diaphragm to draw and inject fluid, offering precise control and high pressure. Peristaltic pumps use rollers to squeeze flexible tubing, ideal for the gentle handling of viscous or shear-sensitive chemicals but with limited pressure capabilities.

5. How often should I calibrate a chemical injection pump?

Calibration should be done at startup, after any maintenance, and periodically—usually every 3 to 6 months—depending on usage and the chemical being dosed. Regular calibration ensures accurate dosing, which is critical for both safety and effectiveness of the treatment process.