Knowledge needed please

[TimGC]

Hi,

I have a Wolf Dakota 2hp 100lt 10 (wishful) CFM machine obtained from Amazon I believe, back in 2017 at the latest. I'm sure it's just a far east made unit painted and marked up for whichever big box company that batch was made for.
It has only had around 2 hours use and then was stripped down for conversion to a vertical receiver with the pump and motor connected elsewhere.

The receiver is in a 'bare bones' state as my son stripped it down. Unfortunately, while at university, he chose to remove himself from the gene pool. When we sent his Range Rover Classic to someone who was more than happy to continue the build, it is possible the box of fittings for the compressor went with it. Now, after an extended period of time I have decided to complete his idea.

Here are my questions: Could someone please supply me with the correct thread sizes for the pipework needed to join the two entities' the large tube from the cylinder head to the non-return valve unit then to the receiver and the thinner pipe from the Valve to the control assembly.

I will get the pipes/ hoses made up in line with his plans as I don't have the originals, besides I think they would be too short and inflexible.

I have read here about building a water trap using Dessicant. I'm familiar with that idea as I have something similar in my shower extractor system (Bad planning as I couldn't get the hose to the eves. I just dry it out every couple of weeks. So, I will incorporate that system.

The Machine will be used mainly for resin casting, wood turning, and general-purpose air in the shed.

Thank you

Tim

 

[voipio]

Sorry to hear about your son.

I'm not familiar with this compressor, although compressors generally use BSP threads, or NPT if of US origin (the two are not strictly compatible), so it's useful to measure the thread diameters and pitch, to get an idea.

This link might be useful.

Amazon.co.uk : wolf compressor parts

 

[indy4x]

All of the compressors I've pulled apart and modified have all been BSP

 

[DaveB]

The pipe from the relief valve to the control switch is often a hard nylon tube with compression fittings or pull-in type connectors.

 

[Dragnet]

Measure the diameter of the openings and you'll get an idea of what size fittings you need. While BSP (British Standard Pipe) is sold in inches, the sizes do not correspond to the measured diameters of the fittings as the nomenclature is related to the bore size of drawn pipes in the Victorian period. There's a table here on Wikipedia. You will have a local compressed air place where you can go down and get all the connectors and bits and bobs you need, and the range will be more comprehensive than Screwfix et al. For example, KeyPneumatics are in Poole. I have used AddAir as my local supplier. In my experience these places have swish websites, but are really some friendly fellows in an industrial estate happy to give advice and sell a hobbyist a few quids' worth of adaptors and hose. Even better if you can take something in and they can ensure the fittings are the right threads, which I've done before now.

I've used malleable iron pipework for the run to the regulator from the receiver on my moveable compressor, as it's less likely to fracture than copper from work-hardening. My trolley means I can't position the regulator/filter straight off the receiver.

The compressor - NRV connection is usually a braided semi-armoured pipe, flexible so it absorbs the compressor's vibration. You can clearly see it to the left of the compressor in the attached photograph. You can also see the (black) hard nylon tube mentioned by DaveB coming out of a push-fitting on the NRV. The other end of this goes under the compressor and motor and pops up to go into the pressure control switch.

The Amazon link above suggests some parts in that search are metric, like this. Measuring the threads' diameter and pitch will show you which is which. If you have a thread gauge, so much the better as you can get a good idea of the thread angle and whether the roots and peaks are rounded, truncated or sharp. If you need a piece different from the standard part since you're changing how the compressor and receiver are orientated, it's likely you'll need to get your local air place to make you up a hose. It's not onerous, just best to have the right tools and materials than try to DIY it for a one off you want to be reliable.

 

[TimGC]

Thank you all for your comments. I'm thinking I should be able to figure it out from here.

Merry Xmas, seasons greetings, (whatever floats your boat ) & wishing you all a happy and a successful '25.

 

[julianf]

All of the compressors I've pulled apart and modified have all been BSP

I had one of those chepo ones once (as part of a job lot) - the castings were made of something right dubious and, iirc, some npt thread.

My memory may not be correct. I gave the unit to a friend who bought a load of fittings for it and then found the head gasket was stuffed and gave up. Felt a bit guilty about it all - even though I didn't take any money for it, "I" still wasted his.