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Mechanically actuated metering pumps

GM Series

GM Series pumps are mechanically actuated diaphragm metering pumps for dosing liquids. Easy to use and requiring minimal maintenance, they are built to high quality standards.
The pumped fluid is separated from the drive mechanism by a diaphragm that protects the pump components from the potentially harmful effects of the liquid. The design is safe, with no external moving parts and leak-proof operation.

Thanks to their simple construction and long-term reliability, GM metering pumps are used in every industrial sector, offering excellent performance and minimal maintenance.

Precision mechanical dosing for every industrial requirement

A wide range of fluids with different viscosities can be handled effectively by GM Series mechanical diaphragm metering pumps. Choosing the right metering pump depends on several key factors, which must be carefully considered to ensure the best precision and reliability in the specific operating context.

The parameters to be analysed are:

The nature of the fluid to be pumped, its viscosity, and the solids it contains
Pumping capacity in relation to the desired flow rate
Suction and pressure conditions
Compatibility of the wetted materials with the liquid and the process

The GM Series is available in three pump-head configurations (PP, PVDF, and stainless steel) to cover the entire range of flow rates and pressures required by the industrial dosing market.
The gearbox bodies for low and medium flow rates (up to 250 L/h) are made of TECH technopolymer; the gearbox bodies for high flow rates (up to 1000 L/h) are made of aluminium.

QUALITY

Operation without valves or seals, reducing breakages and malfunctions even in heavy-duty applications and where high suction capacity and gentle handling are required, without altering the characteristics of the fluid.

SAFETY

Particularly suitable for sensitive, viscous, and dense products, including in explosive atmospheres thanks to Eex-d motor versions available on request.

PRECISION

High dosing accuracy and consistency for applications requiring accurate fluid control, with a tolerance of ±2% from 10% to 100% of the nominal flow rate.

Thanks to their simple construction and reduced maintenance times, GM metering pumps offer extremely low operating and maintenance costs.

How the diaphragm metering pump works

Diaphragm metering pumps are among the most reliable technologies for precise dosing of liquids in industrial applications. Discover how the GM Series is designed and which principles ensure consistent performance over time.

How does a GM metering pump work?

Mechanical diaphragm metering pumps are an essential, safe, and cost-effective pumping technology. This configuration enables precise and reliable pumping, making GM metering pumps ideal for industrial and process applications where the delivered dose must remain repeatable over time.
The drive unit of each pump consists of an electric motor coupled to a speed reducer in a junction box. The rotary motion of the motor is converted into reciprocating movement of the PTFE diaphragm, which draws the fluid through the suction valves and pushes it through the discharge valve.
Thanks to their configuration, these pumps can handle a wide range of fluids while ensuring precise and constant pumping. Dosing accuracy is also guaranteed by micrometric manual adjustment (1 mm/revolution), which can be operated both while running and when stopped, adjustable from 0 to 100%.
The pump operation allows fluids with high viscosity to circulate while maintaining a safe and reliable mechanical seal. An integrated onboard inverter with digital and analogue I/O and Modbus communication is available as an option.

The advantages of GM metering pumps

No mechanical seal

No mechanical seals are required thanks to the PTFE diaphragm that separates the fluid from the drive mechanism, eliminating wear points and drastically reducing maintenance times.

Resistance and durability

GM pumps are built to withstand aggressive and abrasive fluids, guaranteeing long service life and reliability thanks to innovative materials such as TECH technopolymer and stainless steel for high flow rates.

Leak-proof operation

The design, with no external moving parts and with in-line valves, guarantees fully leak-proof operation, ideal for applications with chemicals and in regulated environments.

Dosing precision Accuracy of ±2% from 10% to 100% of the nominal flow rate, with 0-100% micrometric manual adjustment that can be operated both while running and when stopped, for applications requiring accurate fluid control.

Ease of maintenance Diaphragm replacement is simple and quick, reducing downtime and maintenance costs. The only components subject to wear are the diaphragm and the suction and discharge valve assemblies, which can be easily replaced.

Application versatility Available in 4 diaphragm diameters (80, 110, 140, 170 mm), with flow rates from 4 L/h to 1000 L/h and pressures up to 14 bar, it covers all industrial and process dosing requirements.

Fluimac metering pumps, a guarantee of excellence

The construction method of GM metering pumps provides high machining quality and precision, ensuring safe operation without the need for extensive maintenance. The drive speed can be adjusted, as can the pumping capacity according to the viscosity of the fluid.

Quality

The quality of the materials used in the construction of the various GM pump models allows the pumps to operate for very long periods without requiring any intervention, even when dosing the most aggressive products.

Suitability

The GM positive displacement pump is perfect for safely handling and dosing viscous, sensitive, and dense fluids. Thanks to its clean design and FDA-compliant materials, it is also suitable for the food and pharmaceutical industries.

Maintenance

Fluimac metering pumps are characterised by simple and reduced maintenance over time. The only components subject to wear are the diaphragm and the suction and discharge valve assemblies, which can be easily replaced.

Materials

Pump heads available in reinforced PP, PVDF, or SS AISI 316L. PTFE diaphragm. Gearbox body in TECH technopolymer (up to 250 L/h) or stainless steel (up to 1000 L/h). Valve balls in PYREX, PTFE, SS 316L, ceramic, or Hastelloy C276.

By relying on Fluimac to choose a diaphragm metering pump model, you can be sure of working in complete safety, with the guarantee of efficient pumping and full process autonomy.
Our team of technical sales specialists provides support in choosing the fluid handling solution best suited to the specific requirement, based on the fluid to be handled, the application sector, and the pumping needs.

Rely on our technicians to receive all the information you need and define the metering pump best suited to your requirements.

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