Hydrogen vent taming
This design pumps out 130-140 degree hydrogen. Even if started in a vacuum, it won't overheat.
Atmo Sensor (upper left): Above 4000g
Atmo Sensor (below gas pump): Above 1000g
Thermo Sensor: Below 135
Use steel for the Gas Pump
Note: Radiant liquid pipes help cool the steam turbine. You can also enclose the steam turbine and let the radiant pipes handle the cooling. (See Mullematsch's YouTube vidoe for a demonstration of this.) And, of course, you can hook the steam turbine to your base's heavy wire network instead, if you want to harness the powere for your base.
Design by Mullematsch
Source: "Self Cooling Hydrogen Vent (Oxygen Not Included - Tutorial)", by Mullematsch. Available at: https://www.youtube.com/watch?v=wZmEhP2_ojA&list=PLBM_yd3KBXvvPhc9JRj8ZTg5getR3iHZ1&index=4, accessed 2 September, 2020