Milton Roy G Series GM/GB Mechanical Diaphragm Metering Pump

Name: Milton Roy G Series GM/GB Mechanical Diaphragm Metering Pump
Brand: Milton Roy

G Series GM/GB mechanical diaphragm pumps (2026 CN datasheet): simplex max 1800 L/h, discharge up to 12 bar; 10:1 turndown, ±1% accuracy; max media temperature 60°C (2026; 2024 sheet listed 50°C).

Max flow

single head max. 1800 L/h (GB1800; 2026/2024)

Max pressure

max. discharge pressure 12 bar (GM small flow; inside per type no. 12/10/7/5/4/3–4 bar)

Turndown / accuracy

10:1

Wetted materials

—

Protection

—

Power

—

Inquire Now Download datasheetxiongxiaoyang55@gmail.com

Best for: verifying flow/pressure and control interfaces against your dosing duty (Mechanical Diaphragm Pumps). Confirm chemical compatibility and install constraints before ordering — inquire for help.

Features

Mechanical diaphragm; no process-side contour plate for freer passage
PVC / PVDF / 316(L) / high-viscosity / slurry liquid ends
Self-cleaning check valves; variable eccentric for smooth pulsing
Oil-bath lubrication; capacity adjust running or stopped (manual/electric/VFD)
Optional double-diaphragm rupture detection & stroke sensor
Standard motor IP55 / Class F; explosion-proof & 60 Hz options

Specifications

Flow	single head max. 1800 L/h (GB1800; 2026/2024)
Max pressure	max. discharge pressure 12 bar (GM small flow; inside per type no. 12/10/7/5/4/3–4 bar)
Turndown	10:1
Accuracy	±1%
Fluid temperature	high temperature 60°C (2026); 2024 series is 50°C
Suction / inlet	high up to 3 m water column; max. inlet pressure 2 bar
Drive	mechanical drive diaphragm (can)
Brand	m Milton Roy

Applications

Municipal / industrial water & wastewater

Pool and other water-treatment dosing

Materials & media

Ask for wetted-parts details or check the brochure.

Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.

Controls & communication

Control options are listed in notes or confirmed on inquiry.

Models & specs

Model	Flow	Pressure	Notes
GM0002	2.25 L/h @Pmax	12 bar	36 spm
GM0005	4.5 L/h @Pmax	12 bar	72 spm
GM0012	12 L/h @Pmax	12 bar	36 spm
GM0025	25 L/h @Pmax	12 bar	72 spm
GM0050	50 L/h @Pmax	10 bar	144 spm；0.25 kW
GM0090	85 L/h @Pmax	7 bar	72 spm
GM0120	115 L/h @Pmax	7 bar	72 spm
GM0170	170 L/h @Pmax	7 bar	144 spm
GM0240	235 L/h @Pmax	7 bar	144 spm
GM0330	315 L/h @Pmax	5 bar	144 spm
GM0400	400 L/h @Pmax	5 bar	144 spm；0.37 kW
GM0500	500 L/h @Pmax	5 bar	180 spm* (with 60 Hz motor)
GB0080	82 L/h @Pmax	10 bar	36 spm
GB0180	167 L/h @Pmax	10 bar	72 spm
GB0250	237 L/h @Pmax	10 bar	102 spm
GB0350	334 L/h @Pmax	10 bar	144 spm
GB0450	416 L/h @Pmax	10 bar	180 spm; approx. 0.55 kW
GB0500	464 L/h @Pmax	7 bar	144 spm
GB0600	583 L/h @Pmax	7 bar	180 spm*
GB0700	666 L/h @Pmax	7 bar	102 spm
GB1000	946 L/h @Pmax	4 bar	144 spm；0.75 kW
GB1200	1200 L/h @Pmax	4 bar	180 spm*
GB1500	1500 L/h @Pmax	3/4 bar	180 spm*; note (2) 1.1 kW up to high outlet pressure
GB1800	1800 L/h @Pmax	3/4 bar	206 spm*; 0.75/1.1 kW; series max flow