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Metering & Dosing Pumps

S1000 Metering Pump
S2000 Metering Pump
S4000 Metering Pump
1000 – Diaphragm Metering Pump
   123      3,000
GPH        PSI

The Series 1000 chemical dosing pump has a unibody chemical pump design allows pressures up to 3000 PSI and flow capacities up to 123 GPH. It complies with API 675 standards for positive displacement pumps.

Built to handle slurries, off-gasing and high viscosities, making it suitable for applications in water and wastewater treatment, oil and gas refinery, agricultural fertigation and more.

2000 – Diaphragm Metering Pump
   180      1,800
GPH        PSI

The AquFlow Series 2000 is designed to handle pressures of up to 1800 PSI and flow capacities up to 180 GPH. Complies with API 675 standards for positive displacement pumps.

Available in simplex and duplex configurations, depending on the flow capacity needed and it’s fully enclosed in an aluminum housing.  

Applications in a variety of industries, including municipal water treatment.

3000 – Diaphragm Metering Pump
 920       700
GPH       PSI

The Series 3000 reaches 920 GPH (Duplex) and pressure up to 700 PSI. Complies with API 675 standards for positive displacement pumps.

It’s equipped with a true hydraulically balanced diaphragm. Available in 5 different liquid end material ensures you will have corrosion resistance. The drive parts are submerged in a lubricant hydraulic oil bath to ensure minimal wear.  

The modular design combines the Aluminum gear housing with pressure chambers and liquid end. The pump also has an internal relief valve to protect against over-pressurization and eventual rupture.

4000 – Diaphragm Metering Pump
3,530      3,500
GPH        PSI

Not many pump manufacturers can boast a range of flows that start at fractional GPH and go up to 3,500 GPH. And complies with API 675 requirements

 The Series 4000 diaphragm metering pumps come at the top end of this impressive pump line. Built like a battle tank, is made to withstand the most brutal working conditions one can expect a pump to perform in. It balances size and boldness with precision delivering flow consistence with less than 1% variation.

Available liquid end chemical resistant materials such as 316 Stainless Steel, Alloy 20, Hastelloy C, PVC and PVDF. The metered pump also uses a disc valve which affords a larger opening to allow more viscous and some solids if needed.

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Series B Chemical Metering Pump
Series C Chemical Metering Pump
EXCEL AD Series Pump

Series B Chemical Metering Pump
Year after year of reliable performance.

An industry standard for over 20 years, the Series B Chemical Metering Pump is a rugged, reliable choice for the harshest environments.

Its 100% enclosed chemical resistant housing provides this solenoid unit with ultimate protection, making it ideal for corrosive chemical dosing.

With a variety of models and options available, you have full flexibility to control stroke length and frequency, pressure capacity, pulse / 4.20 mA inputs and more.

Series C Chemical Metering Pump
Consistent performance with precision control.

Its solid reputation for precision and dependability make the Series C Chemical Metering Pump a reliable choice for consistent performance, year after year.

Rugged, enclosed chemical-resistant housing makes this solenoid pump ideal for corrosive dosing in the harshest environments.

And along with long-term performance – the Series C also offers superior ease of operation, with readily accessible dial knobs, clear LCD and a variety of flexible control options.

EXCEL AD Series Pump
Designed to meet your
most challenging water treatment needs.

Designed specifically for commercial and industrial applications, the EXCEL® AD is a chemical feed application.

This line includes an advanced design fitting system for secure, leak-proof tubing or NPT connections. Every pump comes standard with FASTPRIME™ liquid ends. If pumping off-gassing liquids, select the (optional) AUTOPRIME™ liquid end. High-viscosity liquid ends (optional) are also available for pumping high viscosity liquids.

With an easy-to-read LCD user interface, external pacing, alarms and pulse/4-20 mA input and output capability – the EXCEL® AD pump has the power and flexibility you need to accurately perform in the harshest industrial or municipal environments.

E Series, Explosion-Proof Pump
Series G Metering Pump
PD Series Pump
E Series
Explosion-Proof Pump
Safety Comes Standard
with Every Pump

Designed for environments that demand additional safety features, the E7 Explosion-proof chemical metering pump delivers the protection your chemical application requires.

Built with a rugged urethane coated cast housing, the E7 Series is designed specifically for hazardous environments and remote use. It meets or exceeds all standards for Class I, Division I, Groups C and D; Class II, Division I, Groups E, F and G.

Available with manual or external controls without the need for costly motors. The robust design of the E Series make it the right choice for hazardous chemical addition applications that require additional safety precautions.

Series G Metering Pump
A rugged design for the toughest challenge, now with NSF/ANSI 61 and 372 certification.

Available in two motor driven models – the SD and the SG – the Series G Metering Pumps feature rugged aluminum construction specifically engineered to handle higher output applications in harsh environments. Certified with NSF / ANSI 61 and 372 for municipal compliance and safety assurance, the Series G is the right choice when choosing a pump for water treatment applications, like coagulation and flocculation.

By combining a heavy-duty industrial drive with state-of-the-art design, the Series G offers a mechanically actuated diaphragm that provides smooth output with reduced potential for system shock and hydraulic oil contamination.

External speed control, stainless steel fasteners and NSF certifications make this powerhouse pump perfect for water treatment applications.

Straightforward Control
PD Series Pumps
Designed to Last

Introducing the new PD Series Chemical Metering Pump: designed specifically for industrial water treatment applications. The new PD Series pump adds advanced technology to one of LMI’s most popular solenoid pump. Available in two models, Manual and Enhanced, the PD Series pump fits seamlessly into your water treatment process while adding convenience and value to your application.

The Manual model offers straightforward control without the need for tedious calculations. Its split-scale dial ensures precision, even at lower flow rates. The Enhanced model offers external control and a large graphical display to provide intuitive access to advanced features.

EXCEL® XR Series Pumps
Intelligent Control
EXCEL® XR Series Pumps
Engineered to Meet Today’s Most Demanding Water Treatment Standards

Featuring enhanced performance and process control capabilities.

The EXCEL® XR metering pump is a mechanically actuated diaphragm pump driven by advanced variable speed technology to provide the most accurate and reliable performance in the industry. This proven technology is easy to maintain and will provide years of maximum up-time service. 
Available in two control configurations, manual and enhanced, the EXCEL XR pump fits seamlessly into the process control requirements of every application. The Manual model includes the ideal level of standard features, while the Enhanced model provides a full range of capabilities. 

All models come standard with a four-color backlit display, multi-language options (English, French, Spanish, Portuguese, and Chinese), and remote operation options, all in a design platform that can adapt as technology evolves. The EXCEL XR metering pump provides everything you need for complete control of your process.

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MD Metering Pump

Hayward Gordon’s SmartFlex SRP series pumps are versatile peristaltic pumps that do not require any lubricant. They are a great choice for the transfer and metering of abrasive slurries and chemicals.

Neptune Hydraulic Diaphragm Metering Pumps are typically used for chemical metering in process and agricultural industries. Chemical metering pumps are available for high and low pressure applications with manual and electronic stroke control.

MD Range progressive cavity pumps are used in virtually all industries for metering and dosing precise quantities. They are particularly good for minimal pulsation conveyance of thin to viscous fluids, as well as corrosive media containing solids.

Metering & Dosing ADPL_ADBPL

All ADBPL and ADPL pumps are available in steel and more popular stainless steel materials of all wetted parts and are ready to ship same-day from our facility. A wide variety of motors and controls are available for the ADBPL from Liberty Process Equipment to meet your exact control needs and budget.


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Beaumont, TX 77707
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Phone: 409- 333-1140
Fax: 409- 333- 1180