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[kno3]

Hello,

I'm looking for a plan to build a steam driven boiler feed pump. Should be something simple and reliable if possible.
Also interested in just the relationship between steam cylinder bore and stroke and pump piston bore and stroke, the rest I can hopefully figure out.

[MOG8]

I have just bought this kit (materials and drawing) . The ram is 6 mm. dia.
I will let you know when it arrives.
Cheers.

[MOG8]

This is the pump;

[kno3]

Thanks! That's a nice looking pump, but quite big for my engines, I believe. Perhaps i could scale it down to a more suitable size?

[oldiron]

Hello,

I'm looking for a plan to build a steam driven boiler feed pump. Should be something simple and reliable if possible.
Also interested in just the relationship between steam cylinder bore and stroke and pump piston bore and stroke, the rest I can hopefully figure out.

  On a boiler feed pump, the steam side should have a larger diameter than the water side if you are using the fed boiler to provide steam to the pump.

John

[kno3]

Indeed, but how much bigger exactly?

[oldiron]

Indeed, but how much bigger exactly?

 10% should do it.

John

[benjaml1]

I would guess that the choice between mechanical & steam driven boiler feedwater pumps would be dependant on the amount of discretionary steam & cash you have....

[Bernhard]

hi...maby you can get a ide from This??

With this small we have developed powerful steam-driven feedwater pump steam with a small amount of steam from the boiler can be diverted during the operation of water from a reservoir to be pumped into the boiler.


Specifications:

Length: 70 mm
Width: 0 mm
Height: 20 mm
Weight: 55 g

Power:
30 ml / min at 0.5 bar operating pressure
50 ml / min at 1.5 bar operating pressure

Against boiler pressure to 3 bar
Initial height to 1500 mm at 1.5 bar operating pressure

Horizontal or vertical mounting
Materials Inc., brass, copper, nickel silver

Steam engine
Self start 2 cylinder, double acting
Continuously variable speed, stop
Steam oiler upstream
Piston Ø 7 mm
Hub 7 mm

Pump:
Piston Ø 3 mm
Hub 8 mm
Driven by gears

Ball check valve is required!

[Bernhard]

Hi..or a eletric pump from Regner  http://cgi.ebay.de/Regner-20220-RC-Speisepumpe-Neuware-/270523446323?cmd=ViewItem&pt=DE_Modellbau_Modelleisenbahnen&hash=item3efc743433

here is a steam feed pump from Regner,

http://www.youtube.com/watch?v=OxTzQhD6PlQ&feature=related

[benjaml1]

Pollymodelengineering weir pump .....