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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. F

    Rothenberger Eco pipe freezer

    Morning all I've had my Rothenberger eco pipe freezer kit for about 1 year now, it was 2nd-hand when I got it but had only been used a couple of times. All was fine when I first got it & I've used it about 30-ish times since. With no real problems. But I needed to freeze 2 15mm central...
  2. W

    Those of you who have USED something instead of freeze mahine contact paste...

    ...not anecdotally heard what might work but actually done it. What did you use? Run out, all my local merchants need to order it in and got a job tomorrow. Moisturiser?
  3. N

    Freeze incoming main lead pipe (irregular shape)

    Hi I have a problem with an internal stop-tap which has seized open (tried penetrating oil / spanner etc - the spindle will move but only a little bit back and forth). There is no evidence of an external stop tap in the pavement although I have called United Utilities to do a trace and locate...
  4. T

    Electric Pipe Freezer

    Any views on which is the best, most reliable and most efficient? Last I heard it was the freeze master. Are there any new contenders to the crown?
  5. J

    Freezing pipes

    hi not posted for a while, i have a lockshield to change tomorrow and have to freeze due to size of system only using disposable stuff any help or advice much appreciated how much distance do you need before the valve to freeze it thankyou in advance :)
  6. R

    Artic polar freeze spray

    Hi Friends Used my freeze kit the other day!!! Now need new spray. Any recommendations as the cheapest place to buy some? Cheers Rct
  7. D

    Rothenberger plumb freeze eco repairs

    I bought a second hand plumbfreeze eco a few months back, it worked great for the first few times other than topping the water up but now it just trips outs and I lose the lcd display. Does any one repair these or know of anyone who does? I dont fancy sending it to Rothenberger it will probably...
  8. G

    Rothenberg pipe freezer

    Does anyone own one of these and what's your verdict on performance. Thinking of getting one
  9. Neil T

    pipe freeze near boiler

    i've got a job coming up to install a rad in garage conversion near to the boiler. was thinking of freezing the pipes to T pipework off to rad to save draining system but was wondering what minimum distance should be from boiler, as dont want to do any damage to the boiler? was also looking at...
  10. B

    42mm copper - will it freeze?

    Im used to working up to 28 max but Ive been asked to move a big (oil) boiler running on 42mm. I need to move it across a yard and into a brick out house. The builders will dig me a trench. Its a collossal house with zones everywhere. I would love to be able to freeze the pipes, add isolators...
  11. M

    Pipe freezing

    Alright guys, going to get a kit or take advice otherwise Basic use everyday, what would be best one to get, baring in mind I have never used one but think if I had I would use more, What do you lot think!!??
  12. P

    Ridgid pipe freeze tool

    Is their a need for a tool like this or should I sell mine. I used it primarily on new water main installs on residential properties. Pipe Freezer - RIDGID Professional Tools
  13. J

    Unvented D2 Pipework.

    Does the discharge pipe from Tundish have to be sleeved when passing through a wall?
  14. B

    anti freeze

    how long should anti freeze last in a central heating system?
  15. P

    Leaking pipe in ceiling

    I'm back with another question. I'm going to repair a leaking 10mm heating pipe tomorrow. Water has rotted the plasterboard ceiling so will be accessing the pipe through the ceiling. It's a big system in a 5 bed house so don't really want to drain the system. I can't decide whether to bung the...
  16. K

    pipe freezing kit

    Hi all any one know of a decent pipe freezing kit out there dont want to buy a rubbish one something that will do up to 28mm thanks
  17. M

    Holesaw sharpening

    As the title says, can hole saws be sharpened,and if so where? i have a 114mm and a 127mm hole saw and they are quite old now and mostly burn their way through wood now. All the teeth are still there but they are a bit flat now. I am just wondering if it would be much cheaper to get them...
  18. K

    freeze spray?

    Hi , I am in the process of plumbing in a towel rail and have just noticed that the service valves that i fitted intending to connect too are suitable for domestic hot water only not central heating , I was wondering if anyone on here knows if i can use freeze spray on john guest speedfit pipe...
  19. W

    Electric pipe freezer kit

    Hi, I am trying to get my company to invest in an electric pipe freezer kit. We always hire these when required but we seem to be doing this more, can anyone recommend a good model as the one we hire seems good a rothy up to 42mm £1000+ Cheers lads.
  20. C

    rothenberger ro frost

    Anybody give me a review on one of these. been toying with the idea of getting one for ages and now local plumbase has them on offer im thinking of getting one but wanted some real working reviews on it from people i trust lol ta
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