2 compressors to run a blast pot

[brightspark]

They're awfully good aren't they?

bought mine for 75 quid not working ,it needed rewiring and one new 3hp motor been working fine now for over 10 years

 

[RWD3M]

bought mine for 75 quid not working ,it needed rewiring and one new 3hp motor been working fine now for over 10 years

That was a steal. Paid a good bit more for mine around a similar time. Only had one problem, the little valve that sits between the cylinders (something to do with off loading I think) rusted up and the spring failed. I contacted Clarke who couldn't have been more helpful. Sent me a new valve (FOC) and drawing to show how it should be mounted according to some service bulletin or other. Apparently they were fitted wrong (too low) and so moisture built up and caused corrosion.

 

[Vixerfixer123]

Is it worth mentioning the slim chance that they might just try to cut in together and trip the circuit

Already know about that mate.they will be set slightly different

 

[W.olly]

I just connected these two together as in second picture and set the cut in and out on the pressure switch set the outlet reg to 130psii think. then for s[ray gun used a inline reg and on the blast cabinet same again, its own regulator.

 

[Vixerfixer123]

Sorry for the questions folks but i ain’t too clued up on this subject,but do i need to wire the 2 pressure switches together or do i run em separate?

 

[qwakers]

you simply connect the air outlets together, however you fancy. its not hard.

 

[brightspark]

you simply connect the air outlets together, however you fancy. its not hard.

and fit a shut off ball valve between or quick disconect couplings so you can still use them separately

 

[timgunn1962]

Sorry for the questions folks but i ain’t too clued up on this subject,but do i need to wire the 2 pressure switches together or do i run em separate?

No, you don't want the pressure switches wired together. If they were wired together, both motors would start at the same time, putting a big load on the supply. You want the pressure switches set slightly differently, so the first one to start has passed the starting surge and is running normally before the second one starts.
In reality, it's pretty difficult to get them to start together and I thought I'd mention it's not what you want, just in case you are of the type who will spend hours trying to make it happen.

 

[Vixerfixer123]

Another ?,do I really need check valves on these?

 

[brightspark]

each compressor has a none return valve fitted between the compressor pump and the tank thats it nothing else needed

 

[Vixerfixer123]

each compressor has a none return valve fitted between the compressor pump and the tank thats it nothing else needed