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In a turbopump feed system it is still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

Different vehicles have used stored onboard gas (typically helium) or autogenous propellants to provide this pressurization.

Further reading:

• Why does the Falcon 9 require a helium pressurization system?
• Why does the 2nd stage of Falcon 9 need compressed He tanks?
• Is presssuized gas absent in a turbopump-driven rocket engines?
• Why Use Helium?
• Disposition of the Oxidizer Tank in Rockets with Autogenous Pressurization

In a turbopump feed system it is still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

Different vehicles have used stored onboard gas (typically helium) or autogenous propellants to provide this pressurization.

Further reading:

• Why does the Falcon 9 require a helium pressurization system?
• Why does the 2nd stage of Falcon 9 need compressed He tanks?
• Is presssuized gas absent in a turbopump-driven rocket engines?
• Why Use Helium?
• Disposition of the Oxidizer Tank in Rockets with Autogenous Pressurization
• How does tank pressurization work?

In a turbopump feed system it is still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

Different vehicles have used stored onboard gas (typically helium) or autogenous propellants to provide this pressurization.

In a turbopump feed system it is still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

Different vehicles have used stored onboard gas (typically helium) or autogenous propellants to provide this pressurization.

Further reading:

• Why does the Falcon 9 require a helium pressurization system?
• Why does the 2nd stage of Falcon 9 need compressed He tanks?
• Is presssuized gas absent in a turbopump-driven rocket engines?
• Why Use Helium?
• Disposition of the Oxidizer Tank in Rockets with Autogenous Pressurization

In a turbopump feed system it still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

In a turbopump feed system it is still necessary to pressurize the tanks slightly (10 to 50 lb/in²) in order to prevent pump cavitation.

Rocket Propulsion Elements, Sutton, 4th edition, p. 223

Different vehicles have used stored onboard gas (typically helium) or autogenous propellants to provide this pressurization.