Term molecular distilled vacuum oil (or MD oil) is often used in specifications of vacuum oils especially for rotary vacuum pump oils. But very less literature is available on molecular distillation which creates confusion amongst maintenance engineers as to what exactly is Molecular distillation and how is it different from fractional distillation (which is a common…
Details
Bhartendu Mehta (Name Changed) stormed into my chamber this morning. He seemed to be furious. Without exchanging any pleasantries he started, “How can my machinery manufacturer loot me?” He demanded to know. I was surprised for a minute. After all, besides being a good friend, Bhartendu was a polished businessman; a stalwart in metallizing line…
Details
In any vacuum system it is most important to know accurately the level of vacuum on real time basis as even a minor change in vacuum can result in process parameters going haywire and product quality getting adversely affected. In modern day vacuum systems we use sophisticated vacuum gauges to know the vacuum accurately. In…
Details
Introduction In today’s competitive scenario a lot of stress is laid on increasing productivity by using machine time effectively. In case of Vacuum coating, process time is difficult to reduce without compromising on quality (NOT acceptable). So reducing vacuum time (time required to create desired level of vacuum before starting operation) is the only option.…
Details
Introduction Rejection of metallized parts continues to be a nightmare for production engineers. A finished product getting rejected means a big loss in terms of money and time spent in production of the component. Not only that, rejections also cause tight production schedules to go haywire. Unfortunately not much material is available on…
Details
Product Information SupervacTM SV-SIGMA FAST Diffusion Pump Oil (Alternative to DC 702) Â SupervacTM SV-SIGMA Diffusion Pump Oil (Alternative to DC 704) Â SupervacTM SV-SIGMA+ Diffusion Pump Oil (Alternative to DC 705) Type Silicone Fluid Physical Form Transparent, Water-White in Color Special Properties Chemically Inert, High Thermal Stability, High Resistance to Oxidation…
Details
Various industries employ myriad consumables for vacuum operations. These consumables may cost anywhere from a couple of hundreds to lakhs of rupees. This gives rise to the question: Are low cost consumables lesser in importance to high cost ones? Is that the reason why they cost less? I’ll give you a case in point. Then…
Details
Q.1 Is there an alternative to graphite foil for metallizing? Supervac Graphite Foil- SV-GF Ans. Graphite foil is highly conducting, flexible, compressible and relatively inexpensive. It serves to plug the gap between the evaporation boat and the copper clamp and so prevents any sparking that may take place. There is no alternate to graphite…
Details
Leaks pose biggest challenge to engineers handling vacuum systems. Leakages cripple the work and are invariably time consuming to detect. This blog post is about two major issues related to leakage – Detection and Prevention. Leakage Detection Following are three methods of leakage detection– Physical Verification: – This should be used if even roughing…
Details
What is Grease? Grease is a lubricant in a semi-solid state. It is generally applied to those machinery parts where liquid lubricants would not stay and need to be applied only occasionally. Water Resistant Sealant for Joints It also works as a sealant to keep out moisture and other unwanted…
Details