Racor Filter from ASAP for Volvo MD22P-B

nigelmercier

nigelmercier

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Live in Kent, boat in Canary Islands
www.bavariayacht.info
ASAP have just sent me an article about fuel filters in which they are offering a discount on the Racor 120AT Diesel Fuel Filter:

  • Maximum Flow Rate: 57 LPH
  • Port Size: 1/4"
  • Element: 10 Micron
  • Height: 166mm
  • Width: 81mm
  • Depth: 81mm
  • Bowl Water Capacity: 52ml

I have been meaning to upgrade my filter, and now seems a good time.

A recent email from Parker-Racor technical department highlighted a problem that I have found: "I have searched the web for the fuel flow rate of the Volvo MD22P-B but can’t find a definite answer on what it should be so If you can advise the flow rate then we will be able to advise a suitable Racor unit to do the job..."

I'm also unsure if the screw fittings on this filter are correct, Volvo Penta told me: The four entries/exits on top refer to ¼” – 18 NTPF, but they are unable to give any more data.

Where can I find out the fuel flow rate, and if this filter is suitable?
 
FWIW I installed the same filter about four years ago for my MD2040.... It's been fine and I went by the assumption that I'd never get through 57 litres per hour. It was a similar size to the originally fitted filter.
I bought it and the relevant fittings to connect to new fuel lines off the shelf here...
http://www.hyphose.co.uk/120at-448-p.asp
 
I don't know what the flow rate of your engine is, but assuming it's a sailing boat then it has to be way under 57 litres per hour. Probably about 3% of that.

The fittings on Racor filter heads are American NPT, which are quite similar to BSP sizes but a different thread form. ASAP sell all the bits to adapt them to hose barbs or compression fittings as you prefer.

Pete
 
Don't forget to allow for any diesel being returned to the tank as the pump will always deliver more fuel than the engine requires to run.
 
I suppose if you wanted to be sure, you could measure the volume of fuel delivered by one stroke of the lift pump, multiply that by max engine revs per minute, and multiply the result by 60 to give an hourly rate.

Not sure if the action of the high pressure pump further upstream would increase the rate or restrict it, but at least you'd have a ballpark figure of what the first pump is trying to shift.
 
I use Racor 500MA filters on Ford 120Hp 2723 engines. These are substantially more than 2 litre and run fine. I also have 2 filters per engine with cross over valves in the event of blockage.
 
Good Morning nigelmercia,

We have been looking into this for you and I can tell you that the flow rate of the Volvo MD22 is 25lph,

So the Racor 120AT filter will be fine for this engine.

Thanks
Neil
 
The Racor have plenty of capacity, but the issue is whether they have enough through-flow to work as advertised.

The answer is 'no'; the demand from small engines (even with the return from the injectors) is not enough to make the swirl turbine work.

Having said that, having it work as a simple settling chamber works great and you get the advantage of the sight bowl, a drain tap and filters that can be changed by simple access of the T-bar lid.
They're expensive but those advantages have been enough for me to recommend them as standard fit even on 20 -50 hp sailing boat auxiliaries.
 
TimBennet said:
the demand from small engines (even with the return from the injectors) is not enough to make the swirl turbine work.

Having said that, having it work as a simple settling chamber works great and you get the advantage of the sight bowl, a drain tap and filters that can be changed by simple access of the T-bar lid.
Click to expand...

The Racor 120s do not have a swirling turbine or a T-bar lid :)

Pete
 
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