Ammonia refrigeration compressors

REWINDING

For varnish, we use the latest material to submerge, dip, and encapsulate stators after windings, then curing in our temperature-controlled ovens. Vacuum Pressure Impregnation (VPI) system ensures full slot penetration of varnish to guarantee no wire flex in the slot to eliminate slot burnouts. All of our semihermetic stators and rotors are surge tested to guarantee initial start-up under load. In addition, all stators are tested on a digital watt ohmmeter which enables us to check our rewinders. The digital ohmmeter measuring is as low as 1/10,000 of an ohm to check for the balance of the coils and conductivity through all soldered connections.

INSPECTION

We check all the material dimensionally, quality test for spares and open head testing to check for leakage. We also repair old industrial refrigeration compressor and change the compressor spares only as per requirement.

ASSEMBLING

Directly from sub-assembly/Quality Control, Industrial refrigeration compressor are ready for assembly. All internal parts are QC stamped along with the compressor casting. Torque specifications, tolerances, and clearances pertaining to each assembly are checked. All the instruments are calibrated, following the ISO Certification program.

WELDING

Fully equipped welding department which is skilled in submerged arc welding, tig, and argon gas welding

TESTING

All pre-qualified internal parts are matched to each compressor casting, and crankshafts are thoroughly checked, going through all tolerances and are laid out with new parts on trays for assembly. The final step for QC is to scrutinize specifications, stamping the parts with the QC approval code. Once completed, the compressor is forwarded to Assembling. Reconditioned Compressors are tested with a computerized test program

FINISHED PRODUCT

Leak Detection is accomplished using a highly sophisticated helium detection system. After leak detection, all compressors are evacuated to 250 microns and charged with a 5# holding charge of nitrogen. The industrial refrigeration compressor are then painted to match manufacturer’s original colors and skidded.

CLEANING

All cast iron components and bodies are burned in an air oven for degreasing. Once all oils and metal particles are burned, the castings are placed in a shot peen machine, charged with specially manufactured soft shot, to clean the castings to its original manufactured appearance. This process is environmentally safe and does not use chemicals that are harmful to the environment. Quality control checks all castings and surfaces to assure no particles remain, and that all surfaces meet the required finish to seal. Surfaces with any marks or scratches are put on a lapping machine or one of our resurfacing machines.