R-Series Dia-Vac® Pumps

Standard Dia-Vac® pump – 50 LPM | 24 InHg | 50 psig


R-Series Diaphragm Pumps for Gas Sampling Applications

One of ADI’s original Dia-Vac diaphragm gas sampling pumps, the R-Series has endured the test of time. While incremental improvements and new variants have made the R-Series very popular with most gas sampling applications, its primary purpose of being a rugged all-rounder has not been compromised.

Designed for continuous use, and available in single, double, and quadruple head configurations, the R-Series provides a flexible performance range of up to 150 liters per minute (29.9 InHg, 75 PSIG) to meet your specific exact requirements. These economical, leakfree diaphragm gaseous sampling pumps are also an ideal choice for OEM customers and can be custom designed and built for your specific application.

In addition, proven reliability is ensured by a robust construction composed of state of the art components. ADI’s R-Series is the perfect match for Continuous Emissions Monitoring Systems (CEMS) and Gas Process Analytics applications used in:


  • Environmental gas sampling
  • Gas analysis
  • Chemical processing
  • Gas chromatography
  • Automotive emission testing


Industries Served

  • Petroleum
  • Refinery
  • Chemical
  • Utility
  • Pharmaceutical


Explosion Proof XP Versions for Hazardous Areas

Our RSeries are offered in explosion proof XP versions to be used for hazardous atmospheres and media. Equipped with ATEX/IECEX certified explosion-proof motors to give you the added dimension of safety, the R-Series XP design ensures sparks that can lead to detonation will NOT occur during normal operation. 


Multiple Power Options

For greater flexibility, R-Series pumps offer a choice of dual voltage 115v/230v, dual cycle 50/60 Hz AC motors. Air driven motors are offered for hazardous atmospheres.


Heated or Elevated Head Options

The heated head option allows the R-Series to keep the medium in a stable gaseous state. This maintains sample integrity as well as prevents condensate build-up and reduces pump corrosion.

The elevated head option keeps the body of the pump and the motor safe and away from high temperatures in hazardous areas. The maximum permissible temperature for the pump head is 200°C (400°F). 


Designed for Accuracy and Longevity

R-Series pumps are manufactured using aluminum, 316 stainless steel, and optional Teflon/aluminum or Teflon/316 SS wetted parts for superior performance and durability. 


Additional R-Series Benefits

Double Diaphragm Option - This option allows for increased safety when transporting expensive or extremely hazardous gasses. Should the primary diaphragm fail, the secondary diaphragm keeps the sample media intact.

Robust, Proven Design - Delivers leak, oil, and contamination free gas samples. Offers high chemical and corrosion resistance. Can handle small amounts of vapor and water while continuing to operate.

Low Maintenance and Reliable - Long product lifespan and easily field serviceable. Made of chemically inert material to keep sample integrity. The diaphragm lasts, on average, 8-12 months under normal operating conditions.

Adjustable Eccentric Sizing - To match pressure, vacuum, and/or flow to your application, the R-Series offers modifiable eccentric options. This allows you to customize your DiaVac pump to meet your specific application requirements while at the same time increasing the life of the diaphragm and bearings. To find out which eccentric configuration suits your application, contact us.


Made in the USA and Available for Quick Delivery! Manufactured on-site at ADI’s headquarters in Florida, USA. Our experts can assemble most pumps to match your application in a short amount of time.


ADI’s Commitment to Customer Service

When a pump goes down, we know that replacement parts or a completely new pump must be dispatched as quickly as possible. We have a track record for making on-time deliveries no other pump manufacturer can match. It's something we are proud of. It's something you can rely on.

Whatever your gas monitoring or sampling application, our range of products and manufacturing capabilities allow us to meet your exact requirements. Contact us today to learn more about the ways in which we can fulfill your pump needs for gas sampling applications. 

Remember that since 1971, ADI has been passing your gas!