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In a Geordie-styleee
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Discussion Starter · #1 ·
Don’t know if anyone had brought this up yet but there’s an interesting little booster pump being mooted on the Ybod list. The link for the pump is:

http://www.underpressurediving.co.uk/

From what I can gather it comes in at around 600 quid and does a pretty good job.


Dave.
 

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A short fat well off crap cave diver. Likes wrecks
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Brass Monkey said:
Don’t know if anyone had brought this up yet but there’s an interesting little booster pump being mooted on the Ybod list. The link for the pump is:

http://www.underpressurediving.co.uk/

From what I can gather it comes in at around 600 quid and does a pretty good job.


Dave.


550+ the hoses = 632 but you will need the needle valves and presure gauge as well.

Just placed my order :D

ATB

Mark Chase
 

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"All I want is a KISS!"
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Mark Chase said:
Just placed my order :D
It'd be good to know how it pans out for you Mark... would be keen to hear your tales of woe or delight. In short, another Chasey report please mate :D

Cheers

Rich
 

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A short fat well off crap cave diver. Likes wrecks
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RichClark said:
It'd be good to know how it pans out for you Mark... would be keen to hear your tales of woe or delight. In short, another Chasey report please mate :D

Cheers

Rich

No problem.

Been told delivery will take 3 weeks.

ATB

Mark Chase
 

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How does it work?

Having no mechanical bias whatsoever, can someone please explain how this works?

Is it powered by compressed air? If so, where are you getting your 10-12 bar compressed air supply from Mark? Can you use another compressed air cylinder?
 

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Mick E said:
Having no mechanical bias whatsoever, can someone please explain how this works?

Is it powered by compressed air? If so, where are you getting your 10-12 bar compressed air supply from Mark? Can you use another compressed air cylinder?
From the LP side of a regulated scuba cylinder would be ideal if you're out and about. In your garage a paint-spraying type compressor would be the best solution.
 

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Mick E said:
Having no mechanical bias whatsoever, can someone please explain how this works?

Is it powered by compressed air? If so, where are you getting your 10-12 bar compressed air supply from Mark? Can you use another compressed air cylinder?
Yes, it's driven by compressed air, either from a scuba cylinder via the medium pressure take-off from a 1st stage (interstage pressure set to 10bar) or a paint spray gun compressor (with water/oil filter) such as:

http://www.machinemart.co.uk/product.asp?p=000114052&r=2007&g=102

JT
 

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Mick E said:
Having no mechanical bias whatsoever, can someone please explain how this works?
The low pressure air goes in to one side of a piston pushing it down. As the piston reaches its maximum stroke it triggers a pressure relief valve allowing the drive gas to exhaust and the drive piston to return to its start position where the relief valve closes and new drive gas recompresses the piston again.

At the far end of the drive piston is a smaller compresson piston which simply sucks in gas from one source and pushes it in to another, compressing it slightly.

A full working diagram can be seen at http://www.underpressurediving.co.uk/
 

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Brass Monkey said:
Don’t know if anyone had brought this up yet but there’s an interesting little booster pump being mooted on the Ybod list. The link for the pump is:

http://www.underpressurediving.co.uk/

From what I can gather it comes in at around 600 quid and does a pretty good job.


Dave.
Got one. Excellent bit of kit. Just bought a LP compressor to drive it as well. Complete cost under £650 for mine. A 30:1 boost ratio. If I find out how to add a picture I'll show you mine.... ooh err
 

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A short fat well off crap cave diver. Likes wrecks
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nickb said:
Is that the basic model Mark? Or did he cut you a fantastic deal on the Expedition version?

No basic model. I paid 632 with the hoses. EXP model is 780 with hoses I think.

Found out today its being dispatched Friday 11th.

ATB

Mark Chase
 

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A short fat well off crap cave diver. Likes wrecks
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DrJM said:
Which type of LP compressor ?

Thks

Jerome

Heres all the guff...

Drive pressure 10 bar
Max Outlet Pressure 290 bar
Pump Ratio 1:29
Volume 4.6 cu cm double stroke
Inlet port 3/8" BSP
Outlet port 1/4" BSP (on Expedition unit 3/8" BSP)
Air Drive port 3/8" BSP
Weight 3 kg

All three types are this spec, its the construction materials that vary. The expedition unit is stainless and aluminium, with hand pump option.

Driving the pump at home, using a paint spraying compressor, i bought it from machine mart.

Part No 000114052 Airmaster Compressor Tiger 8/35 £140.94
Part No 000120550 Clark Air Filter £ 11.74

Compressor is 200 litres per min, 10 bar 145 psi

http://www.machinemart.co.uk/product.asp?p=000114052&r=2007&g=102

I can supply whips and adapters

2 metres hose with female 1/4 BSP ends, Stainless £65, standard £35
Adapter 3/8" BSP male to 1/4" BSP male including plus Dowty seal, £6 or in 316 stainless £15 (from pump to hoses)
Adapter 1/4" BSP male to 1/4" BSP male including Dowty seal, £6 or in 316 stainless £15 (maybe required for certain charging fittings)

You can source gauges/stop start charging valves and needle valves from MDE http://midlanddiving.com/ or Sub aqua products http://subaqua-products.co.uk/index.html

Let me know which one interests you.

Delivery maximum of 3 weeks. Payment with order, cheque to Mark Elliott, 18 Wolstern Road, Adderley Green, Stoke-On-Trent, Staffs ST3 5BU

I carry one full set of spares.
30 pumps have been sold in UK to-date.

Any question, please ring or email.

0784 1402790

Regards

Mark
 

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A short fat well off crap cave diver. Likes wrecks
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More Guff....

UNDER PRESSURE DIVING - BOOSTER PUMPS

HELIUM EXPENSIVE, WANT 232 BAR O2 FILLS, HATE WAITING AT YOUR LOCAL SHOP?

YOU NEED ONE OF THESE.

• Lightweight & portable, take it on the hard boat or in the car, 3 kg.
• Air driven from regulator and cylinder or paint spraying compressor.
• Manual and air version available.
• Achieves maximum pressure of 280 bar output.
• Simple to maintain and service.
• Saves rental money on multiple J cylinders.
• No cooling required.

Three options available:

Mini Booster For use at home, indoors. Al and steel. £550.00
Expedition Mini Booster. Marine, moist environment. Al and stainless £700.00
Expedition + Mini Booster. As above, plus manual & air driven. £800.00

Take a 10 litres of Oxygen and one with Diluent on trips, weekends and you will have no need for spare CCR cylinders or the need to find the local dive shop for gas.
 

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DrJM said:
Which type of LP compressor ?

Thks

Jerome
Jerome,

Jstop has bought "wolfair from Screwfix.co, code 27640. Cost £79.99"

Ian
 

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Mark Chase said:
More Guff....

UNDER PRESSURE DIVING - BOOSTER PUMPS

HELIUM EXPENSIVE, WANT 232 BAR O2 FILLS, HATE WAITING AT YOUR LOCAL SHOP?

YOU NEED ONE OF THESE.
Are they CE marked?
It is group 1 gas equipment, isnt that a catagory 3 device under that Directive?
If it went bang, I would be uninsured is my concern.


And Mark, that avatar..............hell no.:eek:mg:
 

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pressure booster pump
water pressure problem is really a bog problem .Total home water

pressure booster pump is a solution for it.
It will increase the pressure and give better results so you can enjoy

better
shower ana big cleaning and many more.It consume less power.
Its safe and easy to install and fully automatic that maximize and

mainrain household water presure.
Maximum pumping capacity to 26 GPM ,Maximum additional pressure 40 PSI
 
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