Diaphragm Metering Pumps

Not just sealed, hermetically sealed!

The hermetically sealed metering units and resistant materials of ProMinent diaphragm process metering pumps enable them to pump aggressive media with ease. But that’s not all because maintenance-free and fault-free operation also depends on the quality of the diaphragm, which is why ProMinent always ensures that its products are equipped with extremely durable diaphragms.

Tried-and-tested combination

Strong diaphragms, sealed metering units and resistant materials make just the right combination in oil/gas production (onshore/offshore), refineries, and the chemical / petrochemical, pharmaceutical, cosmetics and food production industries. We recommend special ProMinent metering pumps for the process industry.

Practical benefits

The micrometre adjustment dial for the stroke length guarantees precise adjustments and high reproducibility. Compensation means that the pump is operated reliably even during fluctuations in mains voltage. Different control types make easy process integration possible. The dosing head is self-bleeding, which also makes it suitable for outgassing media.

Keep moving

ProMinent always holds a wide range of pump accessories in stock. Our principle is that ProMinent pumps can be extended, are flexibly adaptable and modular. The pump should fit your requirements, not the other way round.

Pump Guide

The choice of pumps is huge: 80 industries, 100,000 products and infinite applications. To make it easy to find your ideal metering pump, ProMinent designed the Pump Guide. In just a few clicks you will find a selection of suitable models.

Here’s how it works

First enter the pump capacity and back pressure. The Pump Guide will then show you all the metering pumps that match your criteria. You can choose between list view and detail view. The database contains all solenoid metering pumps, motor-driven metering pumps, process metering pumps and peristaltic pumps from ProMinent. They are divided into more than 30 different product ranges.

Exactly the right pump

Narrow down your search by clicking on different selection criteria. Do you have a specific industry, operating mode, medium or viscosity in mind? Or maybe you need a pump for zones at risk of explosion? The Pump Guide will take you to the pump you need in just a few clicks.



0.05 to 15.9 gph (0.19 to 60 l/h) with pressures up to 363 psi

The diaphragm metering pump EXTRONIC is perfectly suited to the sensitive application of liquid media in facilities at risk of gas explosions as it is approved in compliance with the EU EX Regulation 2014/34/EU (ATEX). more

Features and Benefits

  • Safe metering in hazardous/classified areas
  • Intrinsically safe contact or analog control
  • Turndown ratio 1200:1
  • Operationally safe for flammable liquids
  • No loss of prime with off-gassing liquids
  • Plug ‘n’ play systems solutions

Makro TZ Diaphragm Metering pump

Capacity range of single pump: 68 - 554 gph (260 - 2,100 l/h), 174 - 58 psi

The ProMinent Makro TZMb is a mechanically or hydraulically actuated motor driven diaphragm metering pump. The stroke length can be adjusted by means of the shift ring mechanism from 0-0.4 in (TZMb), with 0.5 % accuracy. The 5-speed gearbox is encased in a cast, seawater resistant, acrylic resin lacquered housing. more

Features and Benefits

  • Supplied as a single or dual-headed version
  • Add on pumps can easily be retrofitted on site if necessary
  • Each pump has its own independent stroking frequency due to its own internal gear reducer
  • Stroke rate: Standard speed motor or variable automatic capacity adjustment
  • Gear housing: cast housing with a corrosion resistant acrylic resin lacquer finish

Find local ProMinent representative

Contact us

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+1 412-787-2484