Bauer K14 10HP Correct Pully size

[v101]

Hello -

I recently purchased a Bauer K14 Compressor. I purchased the compressor w/ out the motor. I picked up a Baldor 10HP Single Phase motor. I am getting ready to get all the hardware needed to get this hooked up, motor starter, hour meter, etc.

I need some assistance in what size pulley to use for the motor. the Baldor will do 1725 RPM. ?
Or another way to ask the question is what RPM can the Bauer K14 do, and then I can do the math to calculate the pulley size.

Id like to be able to run the compressor so I can get 10-12 CFM from it, which other Bauer K14 owners tell me I should be able to do with a 10HP motor.

Any help is appreciated.

 

[Namreg 58]

Dive Shop Utility Software

the above link gives you several spreadsheets to calculate anything compressor related.

A late model K14 is designed to run at 1500 rpm for an output of 11 to 12 cfm

 

[abnfrog]

that sounds a little high for cfm that rpm...........there are people here that are WAY more quailified to answer you question and will have that info off the top of their heads

 

[windyairman]

Hi
Namreg is right
Taken from the bauer manual 1500rev/min at max 330bar with a 7.5Kw drive motor
Is fine for a late K14-10
Delivery is 320Lt/min or 11.2 cfm

 

[v101]

I looked at the compressor and it says K14 / 85
I take it this means its a 1985 model?

so is it still save to say that this model can also operate safely at 1500 RPM?

i used the XLS sheet that Namreg 58 provided, and measured my fan wheel size, (14") and the math says if my motor is 1725 I need a 12.2 diameter pully to drive the compressor at 1500 RPM.

 

[TrimixToo]

I looked at the compressor and it says K14 / 85
I take it this means its a 1985 model?

so is it still save to say that this model can also operate safely at 1500 RPM?

i used the XLS sheet that Namreg 58 provided, and measured my fan wheel size, (14") and the math says if my motor is 1725 I need a 12.2 diameter pully to drive the compressor at 1500 RPM.

As my K14-85 was made in 1976, and since they made them at least as far back as 1965, you can't infer the year from the model number. However, it's the first two digits of the serial number.

I run mine at 950 RPM, which IIRC Bauer recommends, which should yield 7.4 CFM. As supplied, the K14-85 is rated for 3200 PSI. I upgraded the coalescer, 4th stage head, and 4th stage cooling coil, and turned it up to 3750 PSI. Since the other coils are what came with it, I monitor the head temperatures when it's warm out, and they've always been OK. I'm not sure what would happen if I ran it faster in hot weather without adding fans or better interstage cooling.

 

[windyairman]

1985 so i take it
1 oil pump is belt driven
2 first stage has a suction valve & delivery valve in head & not a reed valve asy
3 has a cooler coil each side of block & coil between the two top cylinders
is this the version you have?

if so i have 4 up and running
one is 1 phase and runs slow on a 4Kw motor
2 are on 3 phase 1100rpm at full load
other is on petrol also slow as has a small power engine fitted
all have new filter systems fitted & run at 330bar

I dont know for sure but no way will i take a k14 this version to 1500rpm at 330bar working

 

[TrimixToo]

1985 so i take it
1 oil pump is belt driven
2 first stage has a suction valve & delivery valve in head & not a reed valve asy
3 has a cooler coil each side of block & coil between the two top cylinders
is this the version you have?

if so i have 4 up and running
one is 1 phase and runs slow on a 4Kw motor
2 are on 3 phase 1100rpm at full load
other is on petrol also slow as has a small power engine fitted
all have new filter systems fitted & run at 330bar

I dont know for sure but no way will i take a k14 this version to 1500rpm at 330bar working

Right. He has a K14-85. The date of manufacture is not yet known. K14-85s normally differ from later K14s in several important respects, including the size and location of interstage and final stage cooling coils, the pressure rating of the 4th stage coalescer, and the service pressure. The oil pump is driven with a chain, by the way, and the cooling coils are probably coiled concentrically near the flywheel, not to the sides of the block as in later models. The internal parts, though, are supposed to be the same part numbers as later K14s with much higher rated pressures.

In any event, it is simply not safe to take a K14-85 up to 330 bar (4850 PSI) without modifications. In fact, I wouldn't (and didn't) take it much over rated service pressure without replacing the 4th stage coil and coalescer.

 

[windyairman]

Right we have got a bit of track with this.
For sure a photo will help the version he has.
I gave a list for the build 1985 version [belt drive oil pump]& valves in first stage head.
Later K14 with reed valve on first stage & better cooling,Also the crank shaft bearings [still same size] had a change.1500rpm is fine for this version.

The very old chain drive k14 version.
Over the years had loads of up grades
As of block number 116 349
All up grades done but the ones i have worked on run 1100Rpm 300bar

We are talking about just the block and not any part of filter system.

After 30/40 years for sure any filter system will have had a re placement/up grade.
Service life of filter system lets say max 15 years
So its been changed out 2 times with hydo tests as required.

Any one using a out of date 30 year old filter system.
In my view is crazy.