BLACKLINE MD Series Motor Driven Diaphragm Metering Pump

OMNI Series DC2-6, Diaphragm, Metering Pumps

OMNI Series DC2-6, Diaphragm, Metering PumpsThe BLACKLINE Series MD is a motor driven, spring return mechanical diaphragm metering pump for precise and accurate metering control. With many standard features, the Series MD includes oil lubricated ball bearings in a die-cast aluminum housing, long life reinforced PTFE diaphragm, micrometer style stroke length adjuster and many liquid end material options to suit any application.

Nine distinct models are available, having flow capabilities to 132 GPH (500 LPH) and pressures to 150 PSI (10 BAR), with a standard turndown ratio of 10:1 or up to 100:1 with the optional VFD Vector. Metering performance is reproducible to within ± 2% of maximum capacity.


  • Liquid End Materials – GFPPL, 316 SS & PVDF.

  • Rugged double-sided PTFE faced, long life diaphragm.

  • Oil lubricated ball bearings in a die-cast aluminum housing.

  • Manual micrometer style stroke adjustment; 10:1 turndown or up to 100:1 with the optional VFD Vector.

  • Standard NEMA 56C or IEC71 motor frames available.

Optional Features

  • Variable Frequency Drive for Automatic Control.

  • Fully Scalable 4-20mA, 0-10VDC signals.

  • NEMA 4X Enclosure.

  • ATEX Group II, Category 3 – Zone 2/22 for non-flammable liquids with proper motor selection.


Pump Head Materials
Turndown Ratio
10:1 or 100:1 with the optional VFD Vector Drive
Seat O-Rings Available
PTFE, PVC, 316SS, Incoloy 825
Rugged double-sided PTFE faced with drive side support ring
Ball Checks Available
Pyrex, 316SS, Hatelloy C-276
Accuracy and Repeatability
Reproducibility of +/-2% of max capacity
Product Options

VFD Vector

Back Pressure Valves
KOP Kits
Pulsation Dampeners
Y Strainers Pressure Relief Valves


Tech Sheets

Install & Operations Manual
BLACKLINE Series MD Installation Operation Maintenance 
IOM Addendum (EN)


BLACKLINE PES1S-BLA Dimensional Drawing

BLACKLINE PES1S-BLHF Dimensional Drawing

BLACKLINE PES2L-BLA Dimensional Drawing

BLACKLINE PES2L-BLHF Dimensional Drawing

BLACKLINE PES2S-BLA Dimensional Drawing

BLACKLINE PES2S-BLHF Dimensional Drawing

Other Documentaation


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