Atlas Copco Dry Pumps

Oil-sealed pumps are reliable, but they need oil changes, they can release oil mist and they can contaminate sensitive processes. Atlas Copco dry vacuum pumps remove oil from the compression chamber entirely. The result is clean exhaust air, no oil to dispose of and fewer routine service tasks. At Provac Sales, we supply Atlas Copco DHS dry screw, DVS dry vane and DZS dry claw pumps, and we offer repair and rebuild service for Atlas Copco vacuum equipment.

DHS Dry Screw Pumps

• Atlas Copco DHS 065 dry screw pump, fixed speed
• Atlas Copco DHS 065VSD+ dry screw pump, variable speed
• Atlas Copco DHS 100 dry screw pump, fixed speed
• Atlas Copco DHS 100VSD+ dry screw pump, variable speed

DVS Dry Vane Pumps

• Atlas Copco DVS 5, DVS 8 and DVS 16 compact dry vane pumps
• Atlas Copco DVS 25, DVS 40 and DVS 60 mid-size dry vane pumps
• Atlas Copco DVS 80 and DVS 100 larger dry vane pumps

DZS and DZM Dry Claw Pumps

• Atlas Copco DZS 065V and DZS 150V dry claw pumps
• Atlas Copco DZM 600VSD+ dry claw pump for higher flow duty

Most dry pump listings are quote-based, so pricing and lead time are confirmed on inquiry. Each product page shows the available specifications and technical sheet.

Dry Screw vs Dry Vane vs Dry Claw

All three are oil-free in the pumping chamber, but they suit different pressure ranges and duty cycles:

• DHS dry screw pumps use two non-contacting screw rotors. They reach deeper rough vacuum than claw or vane designs, handle continuous operation and rapid cycling, and need no water or oil cooling. The DHS series is certified ISO 8573-1 Class 0 for oil-free outlet air.
• DVS dry vane pumps use self-lubricating carbon vanes. They are compact, simple and economical for low to moderate vacuum, typically in the 100 Torr range. The DVS 5, for example, delivers about 3.5 CFM with an ultimate pressure of about 90 Torr.
• DZS dry claw pumps use two non-contacting claw rotors. They are efficient and robust for central vacuum, conveying and packaging, where the working pressure is in the coarse vacuum range.

If your process runs near atmospheric pressure, a DVS or DZS pump is usually the economical choice. If you need deeper vacuum, faster cycles or a pump that tolerates water vapor, a DHS dry screw is often the better fit.

What VSD+ Adds

VSD+ models use a variable speed drive that adjusts motor speed to the actual vacuum demand rather than running flat out all the time. On applications with changing demand, such as several packaging machines on one central system, this reduces energy use and noise. The DHS VSD+ also includes an Elektronikon controller for monitoring and plant integration, and SMARTLINK remote monitoring. Fixed-speed DHS models are simpler and suit steady, constant-demand applications.

How to Choose the Right Atlas Copco Dry Pump

Before ordering, confirm:

• Required working pressure and ultimate pressure
• Pumping speed needed at your working pressure, not only the nominal rating
• Duty cycle, continuous or rapid cycling
• Process vapors, especially water, solvents or powders
• Whether the demand varies, which favors a VSD+ model
• Supply voltage, phase and frequency
• Inlet and outlet connection sizes and available installation space

If you are replacing an oil-sealed pump, send us the old pump model and your process conditions. Dry pumps do not always match an oil-sealed pump's ultimate pressure, so it is worth checking before you switch.

Applications

• Food packaging, including tray sealing and modified atmosphere packaging
• Vacuum drying and cleaning of parts
• Paper converting, printing and web handling
• Electronics manufacturing and pick and place
• CNC clamping and holding, lifting and moving
• Pneumatic conveying
• Laboratory and medical vacuum
• Woodworking

Benefits of Going Oil-Free

• No oil changes, oil disposal or oil mist filter elements
• No risk of oil back-streaming into the process
• Cleaner exhaust and a cleaner work area
• Lower routine maintenance, often limited to filters, belts or bearings
• Better tolerance for some vapors that would degrade pump oil

On the DHS series, for example, the main routine service parts are the grease-lubricated bearings and the belt, which can be changed in about 30 minutes.

Maintenance Tips

• Keep the inlet filter clean and replace it on schedule, especially with dusty processes
• Inspect DVS carbon vanes for wear and replace them before they become too short
• Check belt tension and condition on belt-driven models
• Keep cooling air paths clear, since dry pumps rely on air cooling
• Watch the controller for temperature or current warnings
• Run the pump on after a wet process if the manual calls for a purge or dry-out cycle

Signs Your Dry Pump Needs Service

• Falling vacuum level or slower pump-down
• Higher running temperature or overheating alarms
• New noise, vibration or rubbing sounds
• Higher motor current than normal
• Carbon dust at the exhaust of a DVS pump, a sign of vane wear

Installation Tips for Dry Pumps

Dry pumps are simple to install, but a few checks at the start protect the pump and make later troubleshooting easier:

• Place the pump on a level surface with enough clearance around the cooling air inlets and outlets
• Keep inlet piping as short and wide as practical, since long, narrow lines reduce effective pumping speed
• Fit an inlet filter or separator if the process can carry dust, paper fibers or liquid droplets
• Route the exhaust away from the work area, even though it is oil-free, to keep process vapors out of the room
• Confirm rotation direction on three-phase models before running under load
• On VSD+ models, set the target pressure on the controller to match what your machines actually need
• Record vacuum level, running temperature and motor current on the first run as a baseline

Those baseline readings make it much easier to spot wear early, before it turns into downtime.

Atlas Copco Dry Pump Repair

Provac Sales repairs and rebuilds Atlas Copco vacuum pumps. Service can include inspection, vane, bearing and seal replacement, cleaning and a performance test. Submit an RMA request and complete the contamination data sheet before shipping. See our pump repair page for more information.

Atlas Copco Dry Pumps FAQ

1. What is the difference between Atlas Copco DHS, DVS and DZS dry pumps?

DHS pumps are dry screw pumps for deeper rough vacuum, continuous duty and rapid cycling. DVS pumps are compact dry vane pumps with carbon vanes for low to moderate vacuum. DZS pumps are dry claw pumps for coarse vacuum in central systems, conveying and packaging.

2. Do Atlas Copco dry pumps need oil?

No oil is used in the compression chamber. Some models use grease-lubricated bearings or a small amount of gear lubricant sealed away from the process gas, but there are no routine pump oil changes.

3. What does VSD+ mean on an Atlas Copco dry pump?

VSD+ models have a variable speed drive that matches motor speed to vacuum demand. This reduces energy use on applications where demand varies, such as several machines on one central vacuum system.

4. Can a dry pump replace my oil-sealed rotary vane pump?

Often, yes, but not always. Dry vane and claw pumps usually do not reach the same ultimate pressure as an oil-sealed pump. Send us your old pump model and working pressure and we will confirm whether a DHS, DVS or DZS pump is a fit.

5. How often do DVS carbon vanes need replacing?

Vane life depends on run hours, temperature and how clean the inlet air is. Inspect vanes at the intervals in the manual and replace them before they reach the minimum length.

Request a Quote on Atlas Copco Dry Pumps

Send us your working pressure, required pumping speed, duty cycle and supply voltage. We will recommend the right DHS, DVS or DZS model, confirm availability, or quote a repair of your existing pump. Contact us or call 831-462-8900.