Repair Kit for M Series Dia-Vac® Pumps
M Series Dia-Vac® Pumps
The M Series Dia-Vac® Pumps hit the sweet spot between flow, vacuum, pressure and corrosion resistance.
Engineers across the U.S. and Canada rely on this mid-range line when piston or vane pumps add contamination risk. Browse the models below, then scroll on for application notes, troubleshooting tips, and links to Dia-Vac® pump replacement parts that keep your system running for decades.
What Are M Series Dia-Vac® Pumps?
Diaphragm pumps move gas by flexing a PTFE-coated membrane against check valves, creating a sealed vacuum chamber with zero contamination of the gas. The M Series shares that DNA with every Dia-Vac® family, but it's purpose-built for moderate flow rates (up to 18 L/min) and stable vacuum down to 350 mbarA. Compared with the larger capacity R Series M Series units offer a lighter footprint, simplified wiring, and broad chemical
Typical duty cycles include:
Key Features & Benefits of the M Series
Engineers choose the M Series when uptime, clean gas paths, and flexible mounting options outweigh absolute flow numbers. Below, a closer look at what sets these industrial diaphragm vacuum pumps apart.
Moderate Vacuum Performance
The twin-head diaphragm design pulls to 80 mbar while maintaining low pulsation—ideal for analyzers that hate pressure spikes.
Compact, Field-Ready Design, Chemical-Resistant Materials
Select PTFE-wetted heads for aggressive acid gases; choose 316 SS or anodized aluminum when solvent compatibility and budget balance out.
Oil-Free, Low-Maintenance Operation
With no sliding seals to lubricate, the M Series slashes PM time. Annual diaphragm inspections usually suffice; replacements take <15 min with a basic hex key.
Multiple Configurations
Single and Double Head pumps available to meet your need for speed.
Replacement Parts & Repair Kits
All wearable items—diaphragm, valve discs, valve gasket, and Teflon washer —ship as kits so maintenance crews can rebuild pumps onsite without factory calibration.
Every kit includes:
Need bulk spares for multi-unit fleets? Volume pricing starts at five kits.
Explore OEM Diaphragm Replacement PartsTroubleshooting & Maintenance Tips
Drop in flow?
Check inlet filters first— If the diaphragm is intact, check the valve discs for buildup or debris.
High motor temperature?
Verify ambient rating on motor to ensure it matches the environment.
Condensation inside head?
Heat the pump head and mount so that the arrows on the pump head face down.
Frequently Asked Questions
What makes M Series Dia-Vac® Pumps unique?
They blend mid-range flow/vacuum with a smaller footprint than R Series pumps.
What industries commonly use M Series Dia-Vac® pumps?
M Series Dia-Vac® pumps are typically used on Continuous Emissions Monitoring Systems (CEMS).
Are M Series pumps oil-free?
Yes—fully dry, PTFE-diaphragm operation eliminates contamination of the sample gas.
How often should diaphragms and valves be replaced?
We recommend inspecting diaphragms every 8-12 months for a continuous application.
Is there a video on installation?
Yes! Please visit here.
Ready to Specify Your M Series Dia-Vac® Pump?
Whether you're upgrading a mobile emissions cart or designing a new gas sampling system, ADI Kits stocks every M Series configuration of the chemical-resistant vacuum pumps and spare parts to match. Our application engineers answer most sizing requests within one business day and ship in-stock units same week across the U.S. and Canada.
Need high-flow alternatives? Explore our J Series Pumps or R Series High-Capacity Pumps for other performance envelopes.
NOTE – All of our Series Pumps are available with Heated Head configurations.