Narrow spacing for lp46/50 tanks

[211ratsbud]

Where can I source narrow spacing bands and isolator crossbar for lp46/50 sized tanks in the US?

 

[rhwestfall]

Piranha. It is not narrower centers, so a modern manifold is used... Bands are costly.

 

[rhwestfall]

5.5 Inch Stainless Steel Cylinder Bands , Piranha Dive Shop |

 

[211ratsbud]

I've seen those. The narrow manifolds are modern they're just not as common in the us.

 

[MichaelMc]

I looked at this a bit ago. Piranha was the only one than seemed they might, but the descriptions were confusing. Europe has multiple manifold widths. The only clear option seemed to order from Europe and be very careful to get the right cylinder, manifold, and regulator threading. Also there were some comments that standard US spacing of 8.5 ctc might be more stable as the weight was spread out more, giving the tanks more angular momentum, at the cost in angular agility. The hose lengths and space you have to deal with them would also be more standard. And the Euro valves might not have burst disks. I just went with US 8.5" c-t-c spacing. Good luck.

ETA In 8.5" c-t-c, I got these:
DGX Premium Doubles Bands Set w/Bolts in 5.5" for AL40 and LP50. They fit AL40 fine, but did not seem to fit my filled LP50s without scraping off most of the paint and a bit of the metal, or some elaborate spreading.
DGX also has these: Doubles Bands Set w/Bolts for 5.5-Inch Cyl which may be what they offer for LP50.

Here are my notes:

Isolation Manifolds (230 bar) (Need to check Euro's for BURST DISK presence)
===
BtS (valves do come in US NPSM 3/4 thread) (seem to be BTS-Scubatec, Apeks clone?)
5, 7 and 8,5 liter Cylinders (140 mm diameter) 230 bar $180

Halcyon
140mm Wide 230 bar (seems to mean 8/10L spacing)
HALCYON COMPLETE MANIFOLD | XpertDiver
http://www.deeptech.co.uk/Info/Scubatec_Halcyon.pdf mostly BtS + different O mechanism

Apeks
apeksdiving.com/uk/products/manifolds-and-cylinder-bands/product/listing.html
232 bar DIN, NPSM, 2.62 lb. approx. RRP $223
5.5” Cylinder Centres (154mm to 170mm)
7” Cylinder Centres (177mm to 193mm)
8” Cylinder Centres (216mm to 232mm)

TecLine
171mm 230 bar via divestock.com (also 204mm)


Bands
===
BtS xpertdiver.com,
Ø 140mm, suitable for narrow distance doubles 5, 7 and 8.5 liter
Ø 140mm Wide, suitable for wide distance doubles 5, 7 and 8.5 liter
Ø 171mm, suitable for doubles 8, 10 and 12 liter long
Ø 186mm, suitable for doubles AL80
Ø 204mm, suitable for doubles 12 short, 15, 16, 18 and 20 liter

Apeks:
apeksdiving.com/uk/products/manifolds-and-cylinder-bands/product/cylinder-bands.html
316L Stainless, 1.5kg max, RRP £79, 90 euros
S: Manifold 5.5” (154mm - 170mm), Band 160mm centres, Cylinder: 140mm 7L
M: Manifold 7” (177mm - 193mm), Band 185mm centres, Cylinder: 171mm 10L, 12L
L: Manifold 8” (216mm - 232mm), Band 220mm centres, Cylinder: 204mm 12L Dumpy, 15L

V4Tech Germany xpertdiver.com, www.dirzone.com/cms/en/products/78/587
tank/distance
140/154mm (7l, 8.5l) 5.5"/6.1"
140/186mm easier center valve access, wing center more like larger tanks.
140/185mm 45mm wide - small band length
171/185mm (10l, 12l long) 6.7"/7.3"
204/215mm (12l short, 15l, 18l, 20l) 8.0"/8.5"

Euro tanks and threads
===
- Companies
- Home
- Tank sizes
- 7L is 140 mm == 5.51" same diameter as US LP50
- Eurocylinders AG Diving Cylinders - DiveStock
- BtS Europa AG is a distribution company, particular way of diving - DIR related
- Cylinder threads
- US: NPSM (3/4 NPS), specifically 0.750-14 NPSM, (National Pipe Straight)
- Euro: M25x2 = 25mm diameter and 2 mm pitch, M18x1.5 for smaller cylinders
- DIN Scuba Fittings
- Reg threads
- Euro: Deutsches Institut Für Normung (DIN) spec 477 (G5/8 aka G 5/8" BSP)
- G5/8 (200 bar) (DIN 477 No. 13): Euro: 300 bar test, ~200 bar working
- G5/8 (300 bar) (DIN 477 No. 56): Euro: 450 bar test, ~300 bar working
- The 200/230 and 300 bar names are just a slang term. Both are as strong.
- M26 for over 23%O2
- US:
- G5/8 DIN, mostly in 200 bar for yoke compatibility
- Yoke / A-clamp:
- DIN Scuba Fittings
- SCUBA Valves | Dive Gear Express®

 

[Chris H]

Why wouldn't you get the bands that support a standard manifold? I'm using them on my 50s and it is a great setup. The bands I'm using are from tech_n_rec_solutions on bay. I just checked and Victor is still an active Ebay seller, but doesn't have any bands listed. The bands I got from him are really nice.

 

[211ratsbud]

I found what I was looking for. Actually it found me.

Thank you Justin.

 

[MichaelMc]

I found what I was looking for. Actually it found me.

Thank you Justin.

Any word on a good source of both? What type of manifold and valve did you find?

 

[MichaelMc]

(Moved a question on valve/isolator compatibility, to achieve narrow separation, to new thread U.S. valve and European isolator bar compatibility )

 

[Haaginheimer]

I've got a set of the narrow bands if you want them.