How does a Steam Injector on a Loco overcome the Boiler Pressure?

[6./ZG26_Klaus_Mann]

I understand how the Injector/Ejector Principle Works in General if you use High Pressure Fluid or Gas to Pump to a Non-Pressurized Vessel.
But using 15 bar Steam to move Water into a 15 Bar Boiler through a Check Valve that has 15 Bar on both Sides, how does that work exactly?

Is it all base on Movement? How does the Boiler Pressure not nullify it?

[DD_Arthur]

1 hour ago, 6./ZG26_Klaus_Mann said:

I understand how the Injector/Ejector Principle Works in General if you use High Pressure Fluid or Gas to Pump to a Non-Pressurized Vessel.
But using 15 bar Steam to move Water into a 15 Bar Boiler through a Check Valve that has 15 Bar on both Sides, how does that work exactly?q

Is it all base on Movement? How does the Boiler Pressure not nullify it?

 

There is a cone arrangement of decreasing sizes in the boiler inlet feed that increases the velocity of the water feed to overcome boiler pressure.

 

 I have no idea how I know this shit.....?

[6./ZG26_Klaus_Mann]

38 minutes ago, raaaid said:

The question is if you travelled 2000 years back could you build anything?

Yes, I am a Craftsperson and given the Manpower and support of a King and his smartest heads could probably fire a civilzation into the 1800s in my Lifetime, maybe even the 1900s if I just remembered my Magnetoes and Coils a bit better.

Once I get the first Lathe and Drill/Honing machine working precisely.

Edited October 14, 2021 by 6./ZG26_Klaus_Mann

[Barnacles]

On 10/10/2021 at 6:20 PM, 6./ZG26_Klaus_Mann said:

I understand how the Injector/Ejector Principle Works in General if you use High Pressure Fluid or Gas to Pump to a Non-Pressurized Vessel.
But using 15 bar Steam to move Water into a 15 Bar Boiler through a Check Valve that has 15 Bar on both Sides, how does that work exactly?

Is it all base on Movement? How does the Boiler Pressure not nullify it?

Short answer, venturi effect. 

 

 

Steam passing through a constriction reduces the area of the flow, the mass flow is constant therefore the pressure will increase. So you can get an overpressure to 'force' the water into the boiler. 

 

You can use exhaust steam or live steam from the boiler itself. 

 

Or you can use feed pumps. 

[AndyJWest]

The venturi effect causes a reduction in pressure.