In manufacturing, changeovers are also called “changeover times”, which is the time and process it takes to convert a machine from making one product, to a different product. Its the time between one product being finished, and a new product beginning. Changeover times are very versatile, ranging from minutes to months. Changeover happens where time and processes take place to remove old products and materials from the manufacturing line. Then time is taken to set up new materials and equipment for the new product the manufacturing facility is changing over to. Adjustments are then done after the new equipment is started to ensure the new product is being properly assembled.
Propane () is a three-carbon alkane with the molecular formula C3H8. It is a gas at standard temperature and pressure, but compressible to a transportable liquid. A by-product of natural gas processing and petroleum refining, it is often a constituent of liquefied petroleum gas (LPG), which is commonly used as a fuel in domestic and industrial applications and in low-emissions public transportation; other constituents of LPG may include propylene, butane, butylene, butadiene, and isobutylene. Discovered in 1857 by the French chemist Marcellin Berthelot, it became commercially available in the US by 1911. Propane has lower volumetric energy density than gasoline or coal, but has higher gravimetric energy density than them and burns more cleanly.
Propane gas has become a popular choice for barbecues and portable stoves because its low −42 °C boiling point makes it vaporise inside pressurised liquid containers (it exists in two phases, vapor above liquid). It retains its ability to vaporise even in cold weather, making it better-suited for outdoor use in cold climates than alternatives with higher boiling points like butane. LPG powers buses, forklifts, automobiles, outboard boat motors, and ice resurfacing machines, and is used for heat and cooking in recreational vehicles and campers. Propane is becoming popular as a replacement refrigerant (R290) for heatpumps also as it offers greater efficiency than the current refrigerants: R410A / R32, higher temperature heat output and less damage to the atmosphere for escaped gasses—at the expense of high gas flammability.
by Sam
Good Two Stage Regulator with high flow rate and auto-changeover. Easy to connect to existing setup to replace older leaking regulator. Having the MT indicator is a plus for quick status check of propane supply.
by Terry
Be careful of the 2 spring valves going to each tank, I had one that fell apart. It wasn’t a problem for me because my two hoses going to each tank had the valves in them. The regulator has been working well.