Resistoflex PTFE liners contain no plasticizers,
fillers, or antioxidants that leach out and react with process fluids.
Properly designed sanitary fittings are a given. However, the surface area
exposure of fittings is minimal compared to the hose liner.
Resistoflex hoses feature DuPont TEFLON® PTFE resin
which meets every major high-purity classification:
- USP Class VI
- Meets 3A Sanitary Standards 20-15
- Meetings FDA 21 CFR 177.1550
- USDA Accepted
- 3A Dairy Accepted
As can be seen in Fig. 1, rinse to background
occurred within 5 minutes. Organics were determined by total organic carbon
(TOC) analysis, which also can be seen in Fig. 2. TOCs were below background
levels within 10 minutes.
This is where we begin. Following are the results
of where we end with a product of unequaled purity. We challenge the
competition to meet our standards.
In the effort to produce water of the highest purity for the semiconductor,
pharmaceutical, and biotech industries, engineers are designing fluid handling
systems that do more than just last for a sort period of time. These fluid
handling systems must be designed to prove that they contribute less than parts
per billion of extractables to the process water.
Particulate, ionic, organic, or microbial
contaminates in process fluids reduce product yields dramatically requiring
purity levels, which are orders of magnitude greater than yesterday's needs.
One of the harshest and most widely publicized agents used for wet processing
is deionized 18 megohm-cm water. To determine the effect 18 megohm-cm water
has on Resistoflex PTFE lined hoses, an extractable analysis was conducted by
AT&T Analytical Services. AT&T's analysis consisted of "dynamic rinsing"
of Resistoflex PTFE lined hose samples and subsequent ionic characterization.|
Particulate dynamic rinse data is show if Fig. 3. Particle count
background levels within 50 minutes, proving that Resistoflex PTFE
liner has a
very smooth, contamination-free surface that will not support
Finally, Inductively Coupled Plasma-Mass Spectroscopy (ICP-MS) data for 68
metals and anion analysis samples were taken at 24 hours of dynamic rinse
exposure with 18 megohm water. In all cases, extractables were below detectable
limits for Resistoflex PTFE hoses.
The use of ozone in ultrapure water processing has proven to be a quick and
reliable method of microbial control. Ozonization of ultrapure water is
considered a "clean" process and does not produce any undesirable chemical
byproducts. Unlike traditional chemical disinfectants, ozone dissipates from
the treated water due to its own natural decay properties. Because of this,
ozone is gaining increasing popularity in electronics, pharmaceuticals, and
other ultrapure water-dependent industries. However, the same aggressive nature
that gives ozone the ability to attack and kill microorganisms also makes it
especially tough on the materials with which it comes in contact. As opposed to
silicone hoses, Resistoflex PTFE hoses are chemically inert and non-reactive
Please contact Crane Resistoflex for AT&T's detailed report.