Resources
miltonroy-logo.jpg
Back to the product list

G Series/MACROY D Metering Pumps

The G Series/MACROY D® metering pump is a mechanically actuated diaphragm pump designed for reliable chemical dosing in water treatment, industrial, and agricultural applications. It's ideal for pH control, coagulation, and desalination. With a simple, compact design, corrosion-resistant housing, and high-efficiency motor, it ensures durability and performance. The pump offers flexible stroke adjustment, multiple frame sizes, and various liquid end options. NSF/ANSI 61 and 372 certified, it meets municipal compliance and safety standards.
  • Material (liquid end): PVDF / PVC / PP / 316SS / Acrylic
  • Pressure max: 175 psi / 12 bar (both metallic and plastic liquid end)
  • Flow max: 127 gph / 481 lph (both metallic and plastic liquid end)
  • Flow variation control: Manual / Remote
  • Certifications: API 675, ETL, NSF


With the ability to handle pressures up to 175 psi (12 bar) and deliver flow rates as high as 127 gallons per hour (481 liters per hour), the MACROY D pump is ideal for critical applications such as coagulation and flocculation, slurry treatment, pH control and adjustment, and desalination. Its robust design prioritizes ease of use and longevity, featuring a minimal number of moving parts to reduce maintenance requirements. The pump's compact and lightweight construction, combined with its corrosion-resistant plastic or aluminum housing, enables it to withstand harsh environmental conditions while ensuring long-term durability.

For added flexibility, the MACROY D offers a variable eccentric drive and adjustable stroke length, allowing users to fine-tune chemical dosing to meet specific process requirements. Available in three frame sizes and compatible with a broad selection of liquid end configurations, it provides adaptable solutions for diverse applications. The high-efficiency motor is designed to minimize heat buildup, enhancing performance and operational reliability.

The Macroy D series part numbers start with prefix codes D2*** ; D4*** ; D7*** and D8***. Please see datasheet for full part number configuration options.

Download manual for the catalog of Macroy D series parts