Nash* Vacuum Pump Repair Services
With decades of experience repairing NASH vacuum pumps, our committed staff of engineers and technicians can guarantee that your rebuilt pump will function practically like a new pump.
We always maintain a large inventory of fully restored Nash pumps, as well as a wide selection of replacement parts and components for all types of Nash pumps. Our rebuilt pumps are ready for immediate shipment, and our Swap-Out program offers unrivaled convenience. In addition to replacement parts, Airvac is also pleased to offer high-quality repair kits for various Nash pump models.
To return your pump to its original specifications, we begin every NASH vacuum pump repair with a thorough assessment of all critical components. After that, we disassemble your vacuum pump, rebuild it, and thoroughly test it. We also repair or replace the worn parts. Upgrades to stainless steel can extend the life of high-wear regions beyond OEM specifications.
Our technicians work with all major Nash pump models, including the Nash CL, SC, 904, and XL series. Whether your system is suffering from vacuum loss, excessive vibration, bearing noise, overheating, leakage, or catastrophic internal wear, we have the tools, equipment, and engineering expertise to restore your pump to optimal performance. Every repaired pump is inspected, machined, balanced, tested, coated, and prepared for installation with zero guesswork.
If you’re looking for a trusted partner who understands Nash vacuum equipment inside and out, not a general vacuum repair shop, you’re in the right place.
Our Repair & Rebuild Services
Airvac provides a full-service repair process explicitly developed for Nash liquid ring vacuum pumps. Our rebuild workflow ensures precision, consistency, and long-term performance.
Below is a complete description of the repair methodology used for Nash pumps of all sizes and models.
Complete Teardown & Inspection
We begin by disassembling the pump down to its bare components. During teardown:
- Every part is cleaned, blasted, and prepped
- Clearances are measured
- Casing, cones, and impeller surfaces are analyzed
- Bearings, shafts, and seals are evaluated
- All wear patterns are photographed
- A detailed inspection report is created
This initial diagnostic stage is essential for identifying hidden wear, corrosion, cavitation, and mechanical stress that may not be visible from the outside.
Precision Machining & Component Restoration
Machining is where true repair quality shows. Poor machining leads to early failure, excessive vibration, or reduced vacuum performance. Airvac uses advanced machining techniques to restore exact tolerances.
We machine:
- Rotor hubs
- Shaft journals
- Bearing housings
- Endplates
- Casing interiors
- Cone surfaces
- Impeller edges
Our machining restores the pump’s internal geometry, ensuring efficient fluid flow and vacuum generation.
Bearing, Seal & Impeller Replacement
Wear components are replaced with high-quality industrial-grade parts:
- Bearings rated for high load and long service life
- Mechanical seals or packing sets
- Impellers upgraded or replaced as needed
- High-temperature or chemical-resistant gaskets
- Premium O-rings and shaft seals
Replacing these parts reduces friction, protects the rotor, minimizes mechanical noise, and ensures proper sealing and vacuum performance.
Casing & Cone Repairs
Casing and cone wear is one of the most common causes of vacuum loss in Nash pumps. We repair:
- Internal erosion
- Cavitation pitting
- Corrosion or rust installation
- Out-of-round bores
- Surface deterioration
- Cracked or damaged endplates (if repairable)
If the casing or cone exceeds machining limits, we provide OEM-quality replacements or offer a drop-in-compatible AV-series pump.
Reassembly & Balanced Testing
During reassembly, components are aligned and assembled to exact specifications.
Our testing includes:
- Bearing temperature evaluation
- Vacuum and flow performance simulation
- Rotor balancing at operating speed
- Noise and vibration testing
- Shaft and impeller alignment verification
These tests ensure that your pump is ready for immediate installation with long-term reliability.
Final Coating, Packaging & Shipping
Every repaired pump is coated with a corrosion-resistant industrial finish.Ports are sealed, the unit is secured in a custom crate, and it ships via freight or export.Your pump arrives ready to operate.
Nash* Pump Models We Repair
Airvac specializes in repairing all major Nash models, including discontinued or legacy pumps that OEMs may no longer support.
Nash* CL Series Pump Repairs
We repair all CL models:
- CL-400
- CL-700
- CL-1000
- CL-1500
- CL-2000
- CL-3000
- CL-4000
- CL-6000
- CL-9000
- Custom legacy models
These pumps are widely used in pulp & paper, chemical, and power generation systems.
Nash* SC Series Pump Repairs
Compact and efficient, SC pumps are common in food, chemical, and manufacturing facilities.
We repair:
- SC-2
- SC-3
- SC-4
- SC-5
- SC-6
- SC-7
- SC-10
Nash* 904 Series Pump Repairs
We service all 904 units, including:
- 904-L
- 904-M
- 904-P
- 904-R
- 904-S
- 904-T
- 904-U
- 904-L
We also provide AV-904 drop-in replacements for faster turnaround.
Nash* XL Series Pump Repairs
These large pumps are common in high-demand environments such as paper mills and power plants.
We repair all XL models and provide replacement options if repair is no longer feasible.
- XL-35
- XL-45
- XL-60
- XL-80
- XL-130
- XL-250
- XL-350
- XL-500
These large pumps are common in high-demand environments such as paper mills and power plants.
Nash* MHF / AHF Series Pump Repairs
Airvac provides fully compatible replacements for the Nash MHF and AHF series, engineered for long service life and seamless installation. These units are designed to match OEM performance while offering improved reliability and cost savings.
- AVHF-50
- AVHF-75
- AVHF-80
- AVHF-120
Nash* 2AV / 2BV Series Pump Repairs
We also supply direct replacements for the Nash 2AV and 2BV series, widely used in industrial vacuum applications across manufacturing, medical, and processing environments. Our replacement units are engineered for efficient operation, reduced maintenance, and drop-in compatibility.
- AV/2BV-20
- AV/2BV-35
- AV/2BV-55
- AV/2BV-75
- AV/2BV-115
- AV/2BV-160
- AV/2BV-200
- AV/2BV-300
- AV/2BV-350
Swap-Out & Replacement Options
Airvac offers multiple solutions to reduce downtime:
Swap-Out Rebuilt Pumps (Fastest Solution)
The swap-out program is ideal for 24/7 industrial processes.
How it works:
- Airvac ships you a rebuilt pump immediately
- You install it and resume operations
- You send us your old unit afterward
This eliminates repair delays and keeps your operations running smoothly.
Drop-In Replacement Pumps (AV-Series)
If a pump is too damaged to repair, or if you want a long-term upgrade, our AV-series provides perfect compatibility:
- AV-CL Series → Replaces Nash CL
- AV-SC Series → Replaces Nash SC
- AV-904 Series → Replaces Nash 904
- AV-XL Series → Replaces Nash XL
Industries We Serve
Airvac supports industries that rely on continuous vacuum performance. Based on our ICP, these include:
- Paper & Pulp Manufacturing
- Chemical & Pharmaceutical
- Food & Beverage
- Power Generation & Utilities
- Medical & Healthcare
- General Manufacturing
Common Pump Issues We Repair
Nash pumps often run continuously for years, making them prone to predictable wear patterns. Here are the most common issues we repair:
- Loss of Vacuum
- High Vibration or Noise
- Overheating
- Bearing or Seal Failure
- Casing & Cone Wear
- Impeller Wear or Damage
Why Choose Airvac for Nash* Pump Repair?
Choosing the right repair provider is critical to long-term reliability. Nash pumps are durable machines, but their performance depends on precise tolerances, correct machining, balanced rotors, and quality seals and bearings. At Airvac, we deliver consistently high-quality repairs based on deep technical knowledge and decades of hands-on experience.
Below are the reasons customers across the U.S., Canada, Latin America, Europe, and Asia depend on Airvac for their Nash vacuum pump repair:
23+ Years of Nash-Specific Expertise
We are not a general pump shop. Airvac specializes in Nash vacuum pumps and drop-in-compatible replacements. This level of specialization allows us to:
Below are the reasons customers across the U.S., Canada, Latin America, Europe, and Asia depend on Airvac for their Nash vacuum pump repair:
- Diagnose issues faster
- Understand model-specific wear patterns
- Restore factory tolerances accurately
- Reduce repair time
- Improve long-term performance
Our technicians are experienced in repairing hundreds of CL, SC, 904, and XL series pumps used in heavy-duty industrial environments.
Factory-Spec Rebuild & Performance Testing
Every repaired pump is tested in-house under controlled conditions to ensure it meets or exceeds performance requirements. Our testing procedures include:
- Final vacuum level testing
- Flow analysis
- Seal integrity validation
- Rotor balance measurements
- Vibration monitoring
- Noise level checks
- Power efficiency assessment
Our testing process gives you confidence that the pump you receive will run reliably as soon as it is installed.
Faster Turnaround Than OEM
OEM repair lead times often stretch 6–12 weeks, causing costly downtime.
Airvac typically completes repairs in:
- 10–21 days for standard repairs
- 7–14 days for common models
- Rush turnaround available when needed
This speed is essential for industries where downtime can cost tens of thousands of dollars per hour.
U.S.-Based Facility with Global Shipping
All repairs are completed in the United States at our facility in Bethel, CT.
We ship domestically and internationally to:
- North America
- Europe
- Latin America
- Southeast Asia
- India
We handle export documentation and custom packaging to ensure safe delivery.
Cost-Effective Pricing Compared to OEM
Airvac customers routinely save 30–40% compared to OEM repair prices. Even greater savings are possible with our swap-out program or AV-series drop-in replacement pumps.
Our repairs deliver OEM-level performance without the OEM price tag.
Swap-Out Program Available
If downtime cannot be tolerated, Airvac’s swap-out program keeps your systems running.
You receive a fully rebuilt pump first → install it immediately → send us your old unit afterward.
Contact Airvac Technical Services
Ready to restore the performance of your Nash vacuum pump? Airvac’s technicians are here to help with fast turnaround, cost-effective repair, and expert support. Contact us today for a detailed quote or to speak directly with a specialist. We’ll get your system running reliably again.
Frequently Asked Questions
What is included in a Nash* vacuum pump repair?
Repairs include teardown, inspection, machining, bearing replacement, seal installation, reassembly, balancing, testing, and final coating. Every pump is tested before shipment.
How much does a Nash* pump repair cost?
Costs vary by condition but typically run 30–40% below OEM repair pricing.
Get a quote – Request a Repair Quote
How long does a repair take?
Most repairs are completed in 1–3 weeks, depending on model and damage level.
Rush service is available.
Can old Nash* pumps still be rebuilt?
Yes. Many legacy CL and SC units from the 1970s–1990s are still in service today and can be fully restored.
Do you test pumps after repair?
Yes. Every pump undergoes full performance testing, including vacuum level verification, vibration analysis, and run-in testing.