PTB Sales has continued to invest in quality since establishing our State of the Art Remanufacturing facility in 2011 through process improvements with innovative assembly methods/techniques, supply chain qualification and subassembly testing to ensure that PTB Sales delivers the highest quality refurbished product.
We have implemented several improvements in our remanufacturing process for the vacuum side of the cryopump. These enhancements are delivering an improvement of 42% for time to reach a base pressure of 50 microns and a 25% reduction in the number of ROR cycles to reach a 10 micron/minute value. For our customers the result is significant time savings at start up of a newly installed pump and reduced regeneration time.
Additionally, PTB has implemented multiple helium side remanufacturing process improvements and added enhanced testing that ensures the product will consistently perform to the OEM specifications and meet or exceed all process requirements for vacuum performance as well as extending the lifetime of the refrigerator.
Lastly, PTB has implemented packaging that conforms to ASTM D6198 – 12 Standard Guide for Transport Packaging Design and ASTM D5276 - 98(2009) Standard Test Method for Drop Test of Loaded Containers by Free Fall and is ergonomic friendly ensuring that the high quality refurbished cryopump will be delivered to your faculty with no cosmetic defects and 100% operational.
PTB can deliver significant volume increases, shorter cycle times and higher quality. Not even the OEMs deliver a complete remanufacture on every pump in two weeks or less at this level of quality and price.
Our engineers can match the right cryopump for your process. After we refurbish each cryopump we test it to a set of standard specifications or to a set that you have agreed upon that are customized into each test.
We specialize in Brooks Polycold and CTI Cryo-Torr, On-Board cryopumps and compressors. We rebuild them in-house and guarantee the service with a one year warranty for all models except the older idiosyncratic ones. We make custom length lines and sell various accessories.
Cryopumps have recently become the most widely used of the high vacuum pumps. This is due to high pumping speed, dry operation and low maintenance requirements. The cryopump works by cooling internal arrays down to cryogenic temperatures. The first stage array is cooled to approximately 77° Kelvin, condensing the water vapor and nitrogen while the other, colder array, cooled to approximately 15° Kelvin and coated with activated carbon, condenses and adsorbs the other gases. When the activated carbon reaches saturation, the pump needs to be regenerated. This cycle typically takes three hours. Regen times vary depending on the type of pump and if it has a heated purge. (Note: On-Board pumps have the shortest regen cycle).
Cryogenic pumps are considered hardy because they are not as susceptible to damage caused by over pressure or accidental venting of the pump to atmosphere. All that normally happens when the pressure gets too high is that the pump warms, temporarily losing its ability to pump and goes into regeneration. Cryopumps do not pump helium well and do create vibrations that may interfere with some experiments. Cryopumps have become the pumps of choice for the semiconductor and aerospace industries.