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The "PressureInternal" value is a measure of the pressure inside the active vent pipe network.
 
The "PressureInternal" value is a measure of the pressure inside the active vent pipe network.
  
Contrary to popular belief, both values are enforced, so the Active Vent comes with the functionality of a Pressure Regulator and simultaneously also Back Pressure Regulator. Note that setting these value and changing the Mode afterwards is ill-advised: Changing the Mode always resets both values to their defaults (101/0 for pumping into the room, 0/50 for pumping into the pipe), so they must be set (if at all) *after* setting the Mode.
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Its functionality depends on the selected mode but when used manually both modes only use the "PressureExternal":
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* In "Outward mode" (switch in blue), the active vent increases the external pressure by moving gas from the pipe network to the surrounding atmosphere, up to "PressureExternal", by default equal to 101 kPa
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* In "Inward mode" (switch in red), the active vent decreases the external pressure by moving gas from the surrounding atmosphere to the pipe network, down to "PressureExternal", by default equal to 0 kPa
  
* In "Outward mode" (switch is blue), the Active Vent increases the external pressure by moving gas from the pipe network to the surrounding atmosphere, up to "PressureExternal", but never allowing the pipe's pressure to drop below "PressureInternal".
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The "PressureExternal" value is set to 100 kPa when the [[Circuitboard (Airlock Control)|Circuitboard (Airlock Control)]] is used in a [[console|Console]]. This is the reason why the airlock is unable to pressurise when the atmosphere surrounding the active vent is unable to reach 100 kPa within the airlock.
* In "Inward mode" (switch is red), the Active Vent decreases the external pressure by moving gas from the surrounding atmosphere to the pipe network, down to "PressureExternal", never exceeding the pipe pressure set in "PressureInternal".
 
 
 
The "PressureExternal" value is set to 100 kPa when the [[Circuitboard (Airlock Control)|Circuitboard (Airlock Control)]] is used in a [[console|Console]]. This is the reason why the airlock is unable to pressurize when the atmosphere surrounding the active vent is unable to reach 100 kPa within the airlock.
 
  
 
The "PressureExternal" values can also be inconvenient on worlds like Loulan whose atmosphere is well above 101kPa. Manually-operated airlocks can not equalise the pressure within the airlock during the exit cycle to the Loulan atmosphere pressures. Without equal pressures you can not prevent wind currents from occurring when opening airlock doors. The active vent has no effect when the external pressure within the airlock surrounding the active vent is already >101kPa. When the pressure is <101kPa the vent will stop when it reaches 101kPa.
 
The "PressureExternal" values can also be inconvenient on worlds like Loulan whose atmosphere is well above 101kPa. Manually-operated airlocks can not equalise the pressure within the airlock during the exit cycle to the Loulan atmosphere pressures. Without equal pressures you can not prevent wind currents from occurring when opening airlock doors. The active vent has no effect when the external pressure within the airlock surrounding the active vent is already >101kPa. When the pressure is <101kPa the vent will stop when it reaches 101kPa.
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{{Data Parameters/row|Power|Boolean|w=0|Can be read to return if the device is correctly powered or not, set via the power system, return 1 if powered and 0 if not|multiple=2|0|Off|1|On}}
 
{{Data Parameters/row|Power|Boolean|w=0|Can be read to return if the device is correctly powered or not, set via the power system, return 1 if powered and 0 if not|multiple=2|0|Off|1|On}}
 
{{Data Parameters/row|Open|Integer|1 if device is open, otherwise 0}}
 
{{Data Parameters/row|Open|Integer|1 if device is open, otherwise 0}}
{{Data Parameters/row|Mode|Integer|The mode of the Active Vent.|multiple=2|0|Outward|1|Inward}}
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{{Data Parameters/row|Mode|Integer|The mode of the Active Vent.|multiple=2|0|Outward|1|Inward}}      
 
{{Data Parameters/row|Error|Boolean|w=0|1 if device is in error state, otherwise 0|multiple=2|0|<p></p>|1|Error}}
 
{{Data Parameters/row|Error|Boolean|w=0|1 if device is in error state, otherwise 0|multiple=2|0|<p></p>|1|Error}}
{{Data Parameters/row|PressureExternal|Float|<div>"Outward" mode: Maximum pressure of the surrounding atmosphere. The default value is 101.325 (kPa)<br>
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{{Data Parameters/row|PressureExternal|Integer|<div>"Outward" mode: Maximum pressure of the surrounding atmosphere. The default value is 101.325 (kPa)<br>
"Inward" mode": Minimum pressure of the surrounding atmosphere. The default value is 0 (kPa)</div>}}
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"Inward" mode": Minimum pressure of the surrounding atmosphere. The default value is 0 (kPa)</div>}}  
{{Data Parameters/row|PressureInternal|Float|<div>"Outward" mode: Minimum pipe network pressure. The default value is 0 (kPa).<br>
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{{Data Parameters/row|PressureInternal|Integer|<div>"Outward" mode: Minimum pipe network pressure. The default value is 0 (kPa).<br>
 
"Inward" mode: Maximum pipe network pressure. The default value is 50662.5 (kPa).</div>}}
 
"Inward" mode: Maximum pipe network pressure. The default value is 50662.5 (kPa).</div>}}
 
{{Data Parameters/row|Lock|Boolean|Disable manual operation of the Active Vent.|multiple=2|0|Unlocked|1|Locked}}
 
{{Data Parameters/row|Lock|Boolean|Disable manual operation of the Active Vent.|multiple=2|0|Unlocked|1|Locked}}
 
{{Data Parameters/row|Setting|Integer|A variable setting that can be read or written.}}
 
{{Data Parameters/row|Setting|Integer|A variable setting that can be read or written.}}
 
{{Data Parameters/row|Maximum|Integer|w=0|Maximum setting of the device}}
 
{{Data Parameters/row|Maximum|Integer|w=0|Maximum setting of the device}}
{{Data Parameters/row|Ratio|Float|w=0|Context specific value depending on device, 0 to 1 based ratio|0.0 to 1.0}}
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{{Data Parameters/row|Ratio|Integer|w=0|Context specific value depending on device, 0 to 1 based ratio}}
{{Data Parameters/row|On|Boolean|The current state of the Active Vent.|multiple=2|0|Off|1|On}}
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{{Data Parameters/row|On|Integer|The current state of the Active Vent.|multiple=2|0|On|1|Off}}
{{Data Parameters/row|RequiredPower|Integer|w=0|Idle operating power quantity, does not necessarily include extra demand power}}
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{{Data Parameters/row|RequiredPower|Integer|w=0|Idle operating power quantity, does not necessarily include extra demand power}}
 
{{Data Parameters/row|PrefabHash|Integer|w=0|The hash of the structure}}
 
{{Data Parameters/row|PrefabHash|Integer|w=0|The hash of the structure}}
 
{{Data Parameters/row|ReferenceId|Integer|w=0|Unique Reference Identifier for this object}}
 
{{Data Parameters/row|ReferenceId|Integer|w=0|Unique Reference Identifier for this object}}

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