What type of steam sparger do I have?
Milnor used multiple spargers over the years. See the pictures below.
Some mix water with steam inside the nozzle while others (the simplest one) injects steam into the bath with no premixing.
Air was used on some CBW spargers to quiet the steam mixing process. Later designs did away with the air injection due to their quiet design.
The air injection into the steam side of a sparger is only to eliminate noise. So, if desired, the air injection can be eliminated. The result will be slightly more noise when the steam is flowing.
Low steam pressures create more sparger noise than high steam pressures. In addition, the vibration resulting from low steam pressure can cause damage to the machine shell and steam piping.
Some spargers have longer piping than others. The big idea is to get the mixing nozzle into the bath where water can be sucked through the inlets and mixed with steam.
The latest design of the CBW sparger uses multiple mixing orifices and is effective and quiet. The capacity of the standard CBW nozzle is approximately 30 Bhp. This is true for the old and new style sparger of the CBW. The open area of the nozzles is about 1/2" diameter. The 1/2" diameter results in about 1100 lbs of steam consumption per hour.
Larger nozzles (1") are used on the 92048 CBW And obviously require more Boiler horse power than their smaller counterparts.
STEAM SPARGER PART NUMBERS BY CBW GENERATION
GENERATION 1 (G1)
G1 tunnels consist of model 76032. They use steam sparger ASS60005A which has a .75" pipe inlet
GENERATION 2 (G2)
G2 consists of model 76022, and older versions of 76028 and 76039 models.
These used two steam spargers, ASS60007A as the more common; with ASS60008A as an option for low pressure steam.
ASS60007A and ASS60008A both have .75" pipe inlet.
GENERATION 3 (G3)
G3 models include later versions of 76039 and 76028 models.
Until April of 2015 the sparger remained ASS60007A with a .75" inlet pipe.
However, after April of 2015 G3 CBWs began to use W6 20298D.
This sparger has a 1.25" pipe inlet outside the CBW shell.
This sparger is used on G3 units in Steam Systems and Pulse Flow tanks.
G2 machines have a square top, G3 have a rounded top.
GENERATION 4 (G4)
G4 units are model 92048. Two spargers are used in G4 units.
The more common is ASS60007B / ASSY=STM MIXER 1" ORF-22 LONG,
whereas steam added to the 1st module uses sparger ASS60007D / ASSY=STM MIXER .50 ORF-22"-L.
Both Spargers have 1.25 Inlet pipes.
ASS60007B - This sparger has a 1.25" pipe inlet outside the CBW shell.
The steam nozzle orifice is 1 inch.
