View Single Post
  #12  
Old 2012-12-15, 7:11pm
Ed_Slawson's Avatar
Ed_Slawson Ed_Slawson is offline
Playing with Fire!
 
Join Date: Feb 23, 2007
Location: Rockland, Maine
Posts: 192
Default

We have been using Dewars for over 8 years now... all I can say is that we would never go back to tanks or generators.

Dewar v/s K Tank comparison
180 liter dewar- capacity

We get 4-6 weeks out of a GP-50 dewer (350 psi blowoff) (180 liters), with delivery, hazmat charges, etc, and it costs us $118 a refill. Lease is $300 per year. If we work 3-4 hours a day, we hardly ever blow any off. Our k tank charge is close to $30. each! The dewer is = to 21+ k tanks! Cost wise there is no comparison.

Labor wise there is absolutely no comparison.

180-some 200 liters dewar = to 21-24k tanks

21 k tanks = $ 630.00 (average)

Dewar = 118.00 (includes delivery and all other hazmat, etc. costs)

each k-tanks amount of dewer = $5.62 (average)

For the past year the newer GP-50 dewars have been 200 liters with blow offs of 350 or 500psi... they last even longer and are = to more k tanks.

Back in July of 2012 we were on dewar # 74, the following figures were up to that time:

Dewar # 74 - so far •••• approx = to 1,680 k tanks !!
at $28.50 per k-tank = they would have cost us $46,398.00 ++ gas and time driving to replace them.
74 dewars = cost us about about $9,472.00
so far we SAVED appox. $36,926.00 using dewars !!!

We are now on dewar #81.

The other huge difference from concentrators or generators is that the LOX purity is about 99.5 %. This makes a HUGE difference with many of the boro colors, and all of the silver bearing colors.

We've had a Kobuki, 2 mirages, a delta magnum, 2 phantoms, a couple of carlise ccs, and other assorted torches going all at the same time! Try that with anything other than LOX!

Out of 81 dewars we have only had one screamer, and that was a beat-up ancient gp-45. We had 2 others that blew off almost continually but quietly, and the Oxy company did not charge us for them. Most blow off very quietly, and for a very brief period.

This has been our experience thus far...

-Ed-
__________________

To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

Playing with Fire!
To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
Reply With Quote