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Screw Compressor AirEnd Rebuild Service 

Air ends of screw compressors in industrial applications are exposed to heavy operation and thus underlie permanent wear. specializes in compressor airend rebuild service to make your compressor run reliable again, with a 1 year warranty.

Why replace when you can rebuild? to read more in detail about the common causes of air end failures.
After you place your order, you'll skid your airend and ship it per our instructions
Airend arrives at our repair center. The airend is inspected and enters our rebuild process
Airend rebuild is completed in 10 to 15 business days
Unit is skidded and packaged appropriately and shipped back to your location.

What Happens to Your Airend?
Your airend is loaded off and taken immediately to the disassembly area which contains mounting stand, overhead crane and oil pit for collecting waste oil. All shipping documents are then forward to the office to be assigned a work order number, and a folder is generated for disassembly, teardown and spec sheets. This folder follows the airend through the entire rebuilding process to ensure accurate documentation.
Once the airend is disassembled, damage and measurements are recorded, and pictures are taken identifying the problem areas. A report is generated telling us the front and rear covers were damaged, the sealing strips are partially worn and the bearing journal on the rear is damaged. The seal area on the unit has groves and a small area of the male rotor bore is out of round.
At this point a quote is written for the rebuild and submitted to the customer for approval.
The disassembled airend is then placed in one of the self-contained cleaning systems.
Once we receive the OK and Purchase Order number from the customer, all parts that require work are brought to different areas of the shop and the repairs begin. The front and rear covers will be metalized using the thermal ARC system, when finished depending on the size of the cover, its moved to either the 20" or 36" Blanchard grinder for finishing.
The front male rotor bearing journal is mounted and turned on a lathe and will also be metalized and ground according to specs.

The main bore area if damaged will be plated and bored on a vertical boring mill.

Seal strips are built up and re-cut on a custom jig.
Depending on the extent of the damage, the above work normally takes one to two days to complete.

All components are then rewashed and taken to the assembly area, where all the bearings, seals, gaskets, and related materials needed to complete the assembly are pulled from inventory. Rebuild Process Before assembly takes place all the bearing pockets, bores, and alignments are rechecked. The two rotors are then checked for proper balance and alignment.
The bearings are removed from the boxes and re-measured for proper fit before installing.

To insure that the manufacturers specs are being met, the unit is continually measured and re-checked for accuracy

Upon completion all open ports are plugged with plastic caps and the inlet taped. The airend is now ready to be skid mounted and painted.

As units enter the shipping area all necessary shipping documents and start-up procedures are attached to the unit, and trucking details are arranged.

This whole process will normally take on the average 3 to 5 working days, depending on the MM size and degree of damage. We have setup our shop so the work flows through on a orderly path to insure that all our inspection steps and quality controls are adhered too.
ASPRICH is proud to service all of the following Manufacturers:

CDB68 Screw AIR END 
ESP-EP (3-15 HP)
ESP-EP (15-40 HP)
SP 15-50 (15-50 HP and 100 mm)
SSR EP 15-50 (15-50 HP and 100 mm)
SSR 100-150 (15-50 HP and 100 mm)
SSR 200-250H (50-75 HP HP and 127.5 mm)
SP 60 (50-75 HP and 127.5 mm)
SSR 60XF (50-75 HP and 127.5 mm)
SP 15-50 (15-50 HP and 127.5 mm)
PA 50-60 (50-75 HP and 127.5 mm)
PA 75-100 (75-100 HP and 163.2 mm)
SP 75-100 (75-100 HP and 178.5 mm)
SSR 75-100XF (75-100 HP and 178.5 mm)
SSR 300-500 (75-150 HP and 178.5 mm)
PA 75 (75-100 HP and 178.5 mm)
PA 100-150 (100-150 HP and 204 mm)
SSR 125-200XF (100-200 HP and 226 mm)
SSR 500-800 (100-200 HP and 226 mm)
PA 100-125 (100-200 HP and 226 mm)
SSR 350-450XF (350-450 HP and 304 mm)
SSR 1600-2850 (400-800 HP and 350 mm)
SSR 3000 (400-800 HP and 350 mm)

screw air compressor air end rebuild
Airend Frequently Asked Questions (FAQ)
How many hours of service can I expect to get from a rotary screw airend?
A rotary screw airend is a precision piece of equipment that has running tolerances in the thousandths, most units will provide an average of 25,000 to 50,000 hours, some of the older units will run into the 100,000 hour range.
What kind of maintenance schedule should I follow with my airend? reccommends that you setup your unit on a regular maintenance schedule. Change oil, oil filter, and air filter on a regular basis. Once a year is not enough. The compressor is constantly taking in contaminates with the air. The only way to get rid of harmful contaminates is to change the oil.
What temperature should my compressor be running at?
Most compressors are designed to run 100° degrees above ambient. That makes the average temperature between 175° to 200° maximum. Anything above 200° and youll be shortening the life of the unit. If you find that your unit is running hot and you cant bring the temperature down, youll need to add a cooler.
What could cause my airend to fail?
There are numerous causes, contaminated oil, high running temperatures, and one over looked area - motor bearings. A percentage of airends we receive for remanufacturing fail because the motor bearings lost their trueness, placing stress on the front airend bearings. These bearings are not made to handle this kind of movement. We recommend that the motor bearings be done every 2 to 3 years on 24hrs operating units and every 5 years for the standards. Again a little preventive maintenance can save you thousands in the long run.
What kind of oil should I use?
Use a good quality synthetic oil, todays rotary screws run between 175 to 200 degrees, synthetic oil is the only one that will take the heat and not varnish. Mineral base and turbine oils will varnish, which will lead to overheating problems.
We cant stress filter and oil changes enough. A well-maintained unit will provide reliability, energy savings and peace of mind.
We rebuilds adhere to strict tolerances, use the highest standards to ensure quality, and are backed by a warranty on equipment repaired and defects in materials replaced as well as workmanship for a period of 1 years (12 months).

air end rebuild service

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