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freeze

Freeze drying, also known as lyophilisation or cryodesiccation, is a low temperature dehydration process that involves freezing the product, lowering pressure, then removing the ice by sublimation. This is in contrast to dehydration by most conventional methods that evaporate water using heat.Because of the low temperature used in processing, the quality of the rehydrated product is excellent. In case solid objects like strawberries are freeze dried the original shape of the product is maintained. If the product to be dried is a liquid, like often seen in pharmaceutical applications, the instant properties of the final product are optimized by the combination of excipients (i.e., inactive ingredients). Primary applications of freeze drying include biological (e.g., bacteria and yeasts), biomedical (e.g., surgical transplants), food processing (e.g., coffee) and preservation.

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  1. R

    Rotherberger pipe freeze kit

    Hi Friends Ii have 2nd hand a rothenberger rofrost gas pipe freezer , freezes 10mm to 60mm retail over £300 + VAT. It is not tested, all complete, i purchased and never used it (don't know how). I am in Berkshire (nr Slough). If no takeers here I'll stick it on ebay with a start of £100...
  2. P

    freeze kits

    just reading about freeze kits and was wondering if they can be used, if soldering needs to be done,, im guessing no. thanks
  3. P

    removing radiator

    removed a radiator today, to skim wall.. i used my new stilson and new stanley ratchet spanner and i didnt have any problem with valves weeping also it was microbore and the valve didnt move at all.. i was told stilsons are used as a last resort,, what ever that means, but ive had so many...
  4. C

    Leaking radiator, advice on fixing please?

    hi all, I have a radiator in my hall which I turned off last year, for a reason. It kept leaking. I foolishly forgot this and went to turn it on yesterday and now can't get it to stop leaking no matter how hard I turn the tap towards the "-". I've narrowed it down to coming out of the bit...
  5. C

    pipe freezink kits

    what pipe freezing kits are people using, im after something small enough to carry on the van, only doing domestic work. dont want to spend loads and loads on one, so what do people recomend? links please :)
  6. G

    pipe freezing

    Long long time since done this but got jobs coming up involving this ,heating pipes need freezing and bit of knowledge of any pitfalls please plus how long you suggest freeze the pipe and how long a gap you guys recommend to keep blasting after the initial freeze . I hate doing this type of work...
  7. G

    moving rad (commercial)

    Need to move a radiator in a school about 6 foot, radiator is piped from below where so far not been able to get access into suspended ceiling to see if any ball fix valves are there . Its piped in iron as well what you guys think the odds are there will be service pipes above suspended ceiling...
  8. G

    Rofrost Turbo or Freezemaster 420D?

    I'm looking to buy a pipe freezing kit but I'm not sure what one is the best, most reliable and works quickly. I've looked at a few and can't decide between the Rofrost Turbo 1 or Freezemaster 420D. The Rothenberger looks a more substantial piece of kit, but the Freezemaster has excellent build...
  9. W

    Malfunctioning pipe freezer

    I bought a Rothenberger electronic pipe freezer. Used it without problems 25 or so times. Then on a job it wouldn't freeze. Took home, tested, not working. By this point, owned it about 4 or 5 months. My friend had bought one a month or two ago and it didn't work from the off, he returned it for...
  10. gassafe

    Crack it freeze release spray...?

    Hi guys, Just wondering if anyone has ever used this or recommends it? ( Crack it Freeze release spray ) I was wondering if its worth having on the van for those awkward gate valves and stop taps etc? Or does anyone have any other tips for budging seized valves!??/ Regards
  11. A

    new rothenburger pipe freezer demo

    so i was in the merchants yesterday (plumbase) early doors and the local rothenburger rep came in with their latest portable freezing kit, cant remember the part number of the top of my head but he claimed it was going to revolutionize the pipe freezing market, he then proceded to assemble his...
  12. S

    Freeze Master Pipe Freezer

    Hi all got one of these kits and love it but its not working as well as it used to. do these need re-gasing or serviceing? if they do where can i get it done? i live i devon if theres any where near me or would i have to send it away.
  13. K

    Combi Boiler- No Hot Water since the BIG freeze

    Good Afternoon Gentlemen, I was wondering if you could answer this somewhat vague question? My mate has just phoned me and said that over christmas the water to his house froze, its all ok now but since then the combi boiler is not heating the hot water, the cenral heating is fine its just the...
    • Kevin Randall
    • Thread
    • boiler combi combi boiler freeze hot hot water no hot water oil since water
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  14. S

    Will condensate freeze in cavity wall?

    Hi Guys. Twice, within three days, my Worcester Greenstar has stopped because the condensate pipe was frozen. (I found this out by doing a Google search!). It took almost four hours today to get it going again - endless kettles outside and the fan heater and hottie bottle inside. The 3/4" pipe...
  15. P

    boiler not firing up

    boiler is not firind up, little old lady across from were i live has had her heating on constant and now the boiler wont work at all. she has a woschester bosch boiler and there is a flashing red light on all the time now. any suggestions to whats wrong with it buys? Thank you
  16. D

    Freeze machine

    Hi chaps, I've been after a freeze machine for a while. I did have a rothenburg machine that would do 15/22mm but needed something that would do bigger pipe. Plus the rothenburg machine was a bit unreliable. Anyway, I've bought this: ARTIC ELECTRIC COMMERCIAL PIPE FREEZER 110v on eBay (end...
  17. P

    Freeze Master gas

    Hello Does anyone know what gas is inside freeze master units? THNX I just found Gas is R22 model 350 (red) require 85 grams
  18. K

    Freeze kit?

    Draining down just for a couple of valves can be a real pain, but I have been told a good freeze kit is like a £1000.00 is that correct or are there freeze kits that work fine on domestic repairs and breakdowns for a lot cheaper outlay? Thank you.
    • keepittight
    • Thread
    • 22mm bits cold cold water copper electric freeze head hose mains noise pipe plug remove school smiths valves water work
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
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