
Mechanical Diaphragm Pumps
Milton Roy PRIMEROYAL Model PH API675 Metering Pump
PRIMEROYAL PH compact variable-eccentric metering pump: up to 948 L/h and 690 bar; thrust 350 daN, stroke 30 mm; PTFE HPD and metallic M liquid ends; ±1% accuracy, API 675.
Max flow
up to 948 L/h (single head; HPD Ø70 inside point)
Max pressure
up to 690 bar (; HPD inside max. approx. 250 bar, metal M inside max. 500 bar)
Turndown / accuracy
rated flow 10%–100% range inside ±1%
Wetted materials
—
Protection
—
Power
—
Features
- Brochure: up to 948 L/h and 690 bar
- Variable eccentric drive; thrust 350 daN; 100% stroke 30 mm
- Compact footprint; vertical or horizontal motor
- Liquid ends: PTFE HPD and metallic M
- Optional multi-layer diaphragm rupture detection, jackets, remote heads
- API 675; ATEX options
Specifications
| Flow | up to 948 L/h (single head; HPD Ø70 inside point) |
| Max pressure | up to 690 bar (; HPD inside max. approx. 250 bar, metal M inside max. 500 bar) |
| Thrust | 350 daN |
| Stroke length | 30 mm (100% stroke) |
| Liquid ends | PTFE diaphragm HPD; metal diaphragm M |
| Accuracy | rated flow 10%–100% range inside ±1% |
| Standard | API 675 |
| Brand | m Milton Roy |
Applications
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 | |
| PH-HPD-Ø12 | 15 L/h @10 bar;10.9 L/h @Pmax | 250 bar | HPD PTFE stainless steel liquid end; Ø12; SV 2.9 cm³; 144 spm | |
| PH-HPD-Ø20 | 96 / 84 L/h | 111 bar | HPD;Ø20;180 spm | |
| PH-HPD-Ø40 | 386 / 378 L/h | 27 bar | HPD;Ø40 | |
| PH-HPD-Ø70 | 948 L/h @Pmax | 9 bar | HPD; Ø70; max flow point 948 L/h | |
| PH-M-Ø8 | 14.9 / 10.5 L/h | 500 bar | metal diaphragm M; Ø8; inside max. pressure point 500 bar | |
| PH-M-Ø12 | 33.7 / 27.6 L/h | 309 bar | M;Ø12 | |
| PH-M-Ø20 | 93 / 87 L/h | 111 bar | M;Ø20 |
Dimensions & installation
Dimensional drawings available on request (CAD / PDF).
Downloads
Related / accessories

Mechanical Diaphragm Pumps
KD Series Mechanical Diaphragm Metering Pump (Cheon-Sei / KEMPION)

Mechanical Diaphragm Pumps
ND1000 Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
ND2000 Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
KHV-A 4~20mA Automatic Control Metering Pump (Cheon-Sei / KEMPION)

Mechanical Diaphragm Pumps
NDWL Series Mechanical Diaphragm Metering Pump

Mechanical Diaphragm Pumps
HND Series Mechanical Diaphragm Metering Pump
Related solutions
Chemical Process Precision Dosing
Reactor feeding, pH neutralization and catalyst injection with hydraulic diaphragm and plunger pumps.
Municipal Wastewater Dosing
Integrated dosing systems combining metering pumps and online water quality monitoring for coagulation, disinfection and dephosphorization.
Industrial Cooling Water
Scale & corrosion inhibitor dosing for power and metallurgy cooling systems with online pH/conductivity monitoring.
Related case studies

Chemical
Chemical Park Acid/Alkali Neutralization
Corrosion-resistant mechanical diaphragm pumps dosing concentrated acid/alkali with closed-loop pH control — 99% compliance.

RO Systems
RO Antiscalant Dosing
Proportional antiscalant dosing extended membrane CIP interval from 1 to 6 months.

Wastewater
Municipal WWTP PAC Dosing Upgrade
Mechanical diaphragm pumps with online turbidity monitoring cut chemical consumption by 15%.
Need help selecting?
Share duty (flow, pressure, media, controls) — we reply within 1 business day.