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Bioflex Hose Assemblies - Bioflex is always custom built to individual order and is supplied in the form of a finished hose assemblies, after the length, liner, braid, cover and end fittings have been decided upon.
Selecting the Hose Grade - There are two types of PTFE liner available, natural (GP) and anti static AS) and four types of braid, Grade 304 stainless steel (SS), polypropylene (PB), Hastelloy (HB) and PVDF or Kynar (KYB). All these, plus the rubber covering and other external protection systems are described on the following pages. A hose grade is specified by using the abbreviations given. For example, Bioflex AS,PB would describe a hose with an anti-static PTFE liner and a polypropylene braid.
Selecting the End Fitting - Bioflex is available with a range of 'standard' end fittings , normally supplied hygienically PTFE lined and flared.
Step-Up End Fittings - The very high flow rates of Bioflex hose relative to convoluted hose make it possible to use a smaller bore size Bioflex assembly with 'Step Up' size end fittings, where the end fitting size is one size larger than the hose size. Thus, a lighter weight, more flexible hose can be used without compromising the flow rate!
End Fitting Material - All hose end fitting spigots are supplied made from Grade 316 SS and all ferrules, swivelling nuts and flanges are from Grade 304 SS, or Grade 316 SS if Grade 304 is not available.
Grade 316 SS and Grade 304 SS, depending on the method of manufacture, will be to one of the following specifications.
Grade
|
British
Standard |
American
Standard
|
German/Euro
Standard
|
| 316 |
316 S31 |
AISI 316 |
1.4401 |
| 316 |
316 S11 |
AISI 316L |
1.4404 |
| 316 |
316 C16 |
CF8M |
1.4408 |
| 304 |
304 S15 |
AISI 304 |
1.4301 |
| 304 |
304 S11 |
AISI 304L |
1.4307 |
| 304 |
304 C15 |
CF8 |
1.4308 |
Selecting the Hose Length - Bioflex hose assemblies are made up to the specific lengths required. The hose length is taken as the length from the sealing face at one end of the hose to the same at the other end. The length tolerance is normally +5% -0%, closer tolerances are available to special order.
| *Bioflex Hose Assembly Length Limitations |
| Nominal Size of Hose |
Minimum Hose Assembly Length* |
Maximum Hose
Assembly Length |
| Used Straight |
Flexed Thru' 90 Deg |
| in |
mm |
in |
mm |
in |
mm |
mtrs |
| 3/8 |
10 |
4 |
100 |
5 |
120 |
20 |
| 1/2 |
15 |
6 |
150 |
6 |
150 |
20 |
| 5/8 |
16 |
6 |
150 |
6-1/2 |
160 |
20 |
| 3/4 |
20 |
6 |
150 |
7 |
180 |
20 |
| 7/8 |
22 |
8 |
205 |
9 |
230 |
20 |
| 1 |
25 |
9 |
230 |
10 |
250 |
20 |
| 1-1/4 |
32 |
9 |
230 |
11 |
280 |
20 |
| 1-3/8 |
35 |
9 |
230 |
14 |
350 |
18 |
| 1-1/2 |
40 |
9 |
230 |
15 |
380 |
17 |
| 1-7/8 |
48 |
10 |
250 |
18 |
450 |
13 |
| 2 |
50 |
10 |
250 |
20 |
500 |
10 |
* Listed lengths are for SS, PB or KYB Braided Hose Assemblies fitted with PTFE lined fittings only. For all other specifications including rubber covered grades and non-lined ends, add 100mm up to 1" Bore, 150mm above 1" Bore.
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