remanufactured semi-hermetic reciprocating screw compressors · new and remanufactured...

New aNd RemaNufactuRed Semi-HeRmetic twiN ScRew compReSSoRS

RemaNufactuRed Semi-HeRmetic RecipRocatiNg ScRew compReSSoRS

a wide RaNge of YoRK bRaNd

compReSSoRS

An exActing world-clAss re-mAnufActuring Process

ReceivingThe first destination of a returned compressor when it comes offthe truck is the receiving dock. Compressors are received in awide range of physical appearances and mechanical conditions.

TeARDOWnFrom receiving, the compressor proceeds toour teardown department. In this departmentevery machine is completely disassembledand reviewed for the root cause of failure. Allparts are then initially assessed for re-usability.

WAshingCompressors are thenput through one oftwo parts washingcabinets. Dirt, paint,oil and soot areremoved during thiswash process. Rawblocks are blown dryand undergo the firstinspection for signs ofdamage.

cLeAning sYsTeMOnce the parts are completely dry they are thenput through our large Viking shot blast cabinetto further remove imperfections that haveadhered to the raw parts. Rust, copper slagand paint are removed at this time. Gasket ando-ring surfaces are not affected by this process.

PRe-AsseMBLYOnce theproductionmanager callsfor a compressorto be built, theparts are thenstaged for pre-assembly. Blocksundergo a fine cleaning by hand toremove any leftover residue. At thisstage the final inspection of partsis performed. Parts are pulled andstaged for the assembly area androtors get their bearing races.

AsseMBLY PROcessAssembly is performed in different cells on themanufacturing line. Some compressors are built fromthe ground up by the same technician. Higher demandcompressors go through a series of cells wheretechnicians assemble their own part of the compressor.The cell divisions allow compressors to be built from startto finish with no delays in the assembly operation. Eachtechnician in the process is trained, tested, and certified.

FinisheD AsseMBLYOnce the assembly process is complete, the compressors areskidded and transported to our leak test station. All compressorsare assembled using the same best practices, whether it is aremanufactured compressor or a completely new machine.All parts are inspected and tested to OEM standards.

LeAk TesTIn our leak test station the compressors are submerged in water tankwhich is fitted with lighting. The compressors are filled with drynitrogen to the maximum working pressure (MWP) and inspected forbubbles, which would indicate a leak. Leaks can be found from o-ringglands and gasket surfaces. Even porosity in the casting can be foundwith underwater testing.

TesT PAneLFrom our leak test stand the compressor proceeds to our air-run teststand. The compressor is mounted to a table and piped for suctionand discharge readings. The unit is electrically tested at the test standprior to running to validate proper hook-up. In the process, pressure,temperature, oil flow and power consumption are tested and recorded.A report is generated on the parameters of the test, and this testdocumentation is kept on file at the manufacturing plant.

vAcUUM TesTEach compressor goes through a two stepleak checking process. Earlier the compressorwas submerged in water and checked forbubbles, this time the compressor is pulleddown into a deep vacuum and held inthe vacuum for a stated amount of time.

Compressors that fail togo into a deep vacuum,or rise above theacceptable threshold aresent back for rework.Once the compressor haspassed testing, it is filledwith 5 psig of dry

nitrogen to ensure that no moisturere-enters the compressor.

PAinTingCompressors are painted in ourin-house paint booth in one of twocolors, black or York® CaribbeanBlue.

cOMPRessOR skiDDeDOnce the paint is dry, the compressor is boltedto a shipping skid. Skids are reinforcedwith metal runners to ensure that the heavycompressors do not come loose or break boards on the skid during transportation. Skids are affixed to the compressor prior to storage toexpedite the shipping process.

12 cOMPRessOR (ReADY TO shiP)At this final stagelabels have beeninstalled, documentationhas been affixedto the compressor,motor leads havebeen protected andthe machine has beenbanded and wrappedfor shipment.