Modular Designed Metering Pump

MILROYAL® D series metering pumps are ideal metering technology where chemical injection is required for critical processes in oil and gas, chemical and hydrocarbon processing, water and wastewater treatment and most industries.

Material (liquid end): 316SS / Alloy 20 / Alloy C22 / PVC*
Pressure max: 3,495 psi / 241 bar (metallic liquid end); 150 psi / 10 bar (plastic liquid end); 3,000 psi / 207 bar (packed plunger)
Flow max: 53 gph / 200 lph (metallic liquid end); 34.1 gph / 129 lph (plastic liquid end); 12.497 gph / 47.31 lph (packed plunger)
Multiplex: Available
Flow variation control: Manual / Remote
Certifications: API 675, EC, ATEX, IECEX

*PVC liquid ends are not available with packed plunger type

This product is not available in India.

Modular Pump Design

Flexible modular construction supports various liquid ends and configurations, allowing precise customization for your process needs.

Precision Performance Range

Three frame sizes provide accurate chemical dosing across a wide spectrum of pressures and flow capacities.

Multiplex Configurations

Combine identical or mixed frames to enhance flexibility and adapt to complex or evolving application requirements.

Oil & Gas Reliability

Built for extreme offshore environments, ensuring consistent injection of methanol, inhibitors, and other corrosive chemicals.

Pipeline Flow Optimization (DRA)

Field-proven DRA pumps deliver precise chemical injection to reduce turbulence and improve pipeline efficiency.

Chemical & Water Treatment

Designed for harsh chemicals and industrial water treatment, ensuring accurate dosing, operational reliability, and long-term cost savings.

TYPICAL PERFORMANCE

Packed Plunger

Plunger Diameter	Gear Ratio Code	Maximum Capacity		1/4 HP (0.25 kW)		1/3 HP (0.25 kW)
		Maximum Capacity		Maxmium Discharge Pressure
		ml/H	GPH	PSIG	BAR	PSIG	BAR
1/8 in (3 mm)	60	305	0.081	300	21	-	-
	30	615	0.162	300	21	-	-
	15	1,200	0.316	300	21	-	-
	10	1,800	0.475	300	21	-	-
1/8 HP (3 mm)	60	125	0.033	3000	207	-	-
	30	245	0.065	3000	207	-	-
	15	480	0.126	3000	207	-	-
1/4 in (6 mm)	60	1,230	0.325	300	21	-	-
	30	2,460	0.650	300	21	-	-
	15	4,800	1.270	300	21	-	-
	10	7,150	1.880	300	21	-	-
1/4 HP (6 mm)	60	495	0.131	3000	207	-	-
	30	985	0.260	3000	207	-	-
	15	1,920	0.508	3000	207	-	-
7/16 in (11 mm)	60	3,785	1.000	1000	69	-	-
	30	7,570	2.000	1000	69	-	-
	15	15,520	4.100	1000	69	-	-
	10	23,090	6.100	1000	69	-	-
5/8 in (16 mm)	60	7,950	2.100	650	45	-	-
	30	15,845	4.200	650	45	-	-
	15	31,795	8.400	-	-	650	45
	10	47,310	12.500	-	-	650	45

TYPICAL PERFORMANCE

High Performance Diaphragm

Plunger Diameter	Gear Ratio Code	Maximum Capacity		1/3 HP (0.25 kW)		1/2 HP (0.37 kW)
		Maximum Capacity		Maxmium Discharge Pressure
		L/H	GPH	PSIG	BAR	PSIG	BAR
1 in (25 mm)	60	19.7	5.2	220	15	-	-
	30	39.4	10.4	220	15	-	-
	15	76.5	20.2	190	13	220	15
1 1⁄4 in (32 mm)	60	33.3	8.8	145	10	-	-
	30	66.2	17.5	130	9	145	10
	15	129	34.1	100	7	145	10
1½ in (11 mm)	60	51.5	13.6	70	5	-	-
	30	103	27.2	70	5	-	-
	15	200	53.0	-	-	70	5

NOTES:

1. Typical performance based on 1725 RPM, 60 hz motor. Derate flow rates for all other RPM speeds.

2. Plastic liquid ends are limited to 150 PSIG (10 Bar) @68°F (20°C) and are linearly derated to 65 PSIG (4 Bar) @ 140°F (60°C).

DRIVE DIMENSIONS

NOTES:

Base (shown as dotted lines) supplied only with HPD liquid end.

PACKED PLUNGER LIQUID END DIMENSIONS

HIGH PERFORMANCE DIAPHRAGM (HPD) LIQUID END DIMENSIONS

Plunger Diameter	A (1)	B (1)	C
1 in (25 mm)	6 ½ in (165 mm)	6 ½ in (165 mm)	6 1⁄8 in (156 mm)
1 1⁄4 in (32 mm)
1 ½ in (38 mm)

18 in & 14 in Diameter Plunger-milroyal-d

Plunger Diameter	A (1)	B (1)	C	D
1 in (25 mm)	4 13⁄16 in (122 mm)	4 13⁄16 in (122 mm)	7 7⁄8 in (200 mm)	1/2 in
1 1⁄4 in (32 mm)	5 7⁄32 in (133 mm)	5 7⁄32 in (133 mm)	7 5⁄6 in (194 mm)	1/2 in
1 ½ in (38 mm)	5 7⁄32 in (133 mm)	5 7⁄32 in (133 mm)	7 5⁄6 in (194 mm)	1/2 in

NOTES:

1. A & B dimensions are based on standard ball check configuration and single diaphragm, where metallic liquid end has single ball checks and plastic liquid end has double ball checks. Consult factory for dimensions on optional configurations.