The innovative NAB compressor uses a liquid sealant, avoiding the traditional metal-to-metal contact that causes significant wear and tear. As a result, you'll find that the only parts needing occasional replacement are the bearings and mechanical seals, giving you a near maintenance-free solution.

Capacity 41 to 2,700 SCFM (70 to 4,750 m³/h)
Discharge Pressure to 215 psig (14 bar abs)
NASH’s NAB series are reliable compressors that are capable of handling highly toxic, explosive, and corrosive gasses. They are ideal for use in petroleum refineries and chemical plants, in applications such as flare gas and Vinyl Chloride Monomer (VCM) recovery. The capacities of the NAB series range from about 41 to 2,700 SCFM (70 to 4,750 m³/h) with discharge pressure to 175 psig (14 bar abs).Key characteristics:
- Rugged Design for Harsh Environments
- Capacity to Handle Hazardous Gases
- Wide Range of Capacities and Pressures
- Two Stage Design
- Double Eccentric Casing for Ideal Rotor Balance
- Overhung Impeller with Minimal Rotating Parts
Experience Unparalleled Durability and Minimal Maintenance
Choose the NAB for a high-performance, cost-effective solution that will serve your industrial needs with exceptional reliability and a lower total cost of ownership.
The unique liquid ring technology of the NAB significantly reduces the common challenges of erosion, corrosion, vibration, and noise, offering a quieter and more stable operation.
Versatility is at the heart of the NAB compressor design. It can operate with an array of liquids including water, sulphuric acid, amine, and crude oil, as long as they are non-reactive with the process gas and compatible with the compressor's construction materials. This adaptability ensures that the compressor can be tailored to meet the specific needs of your processes.
Engineered for resilience, NAB compressors are the go-to for handling difficult gases in hazardous conditions, such as wet, toxic, corrosive, flammable, or explosive substances. Their robust design promises consistent, low-maintenance operation that is crucial for industries where safety and reliability are paramount.
Specifically designed to thrive in the most challenging environments, such as those found in the chemical and petrochemical industries, the NAB is built to last. This liquid ring compressor provides dependable service and remarkable durability while keeping operational costs to a minimum. The strategic overhung impeller design is yet another feature that streamlines maintenance procedures, saving you time and resources.
Technical Data
- Shaft Sealing: Mechanical Seals (single acting/double acting) on Cartridge
- Materials: Stainless Steel, other materials on request

Compressor Model | Min Suction Capacity SCFM | Max Suction Capacity SCFM | Maximum Discharge Pressure psig | Differential Pressure psi | Process Connections ANSI |
NAB150 | 41 | 106 | 215 | 200 | 2-1/2" / 2-1/2" |
NAB250 | 88 | 224 | 215 | 200 | 3" / 2" |
NAB600 | 206 | 486 | 215 | 200 | 4" / 3" |
NAB850 | 383 | 589 | 215 | 200 | 4" / 3" |
NAB1100 | 471 | 736 | 215 | 200 | 6" / 4" |
NAB1500 | 471 | 1207 | 215 | 200 | 8" / 6" |
NAB2500 | 589 | 1589 | 215 | 200 | 10" / 6" |
NAB4000 | 1619 | 2796 | 215 | 200 | 12" / 8" |
Parts, Service, Upgrades
Service & Parts
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Field Service
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Parts
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Remanufacturing & Exchange
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