Active Vent - Revision history

RA2lover: add missing unit

2026-02-11T22:33:45Z

add missing unit

RA2lover: minor reading pass, correct pumping rate

2026-02-11T22:31:57Z

minor reading pass, correct pumping rate

Mallaco: Remove leading blank lines at the beggining of the page

2025-11-26T15:32:06Z

Remove leading blank lines at the beggining of the page

AwesomeCronk: Added new logic values from terrain update

2025-10-04T17:49:48Z

Added new logic values from terrain update

2601:1C2:1400:3FE0:9CB:7E38:1F41:6DD2: Minor typo

2025-02-16T23:03:55Z

Minor typo

2601:1C2:1400:3FE0:9CB:7E38:1F41:6DD2: Added notes for visually and logically remembering which Mode relates to inward/outward

2025-02-16T23:02:22Z

Added notes for visually and logically remembering which Mode relates to inward/outward

213.200.49.247: description fix

2024-08-09T13:19:35Z

description fix

OwnerOfThePlace: Undid someone's completely false claims regarding PressureExternal/PressureInternal

2024-05-28T14:19:09Z

Undid someone's completely false claims regarding PressureExternal/PressureInternal

Emilgardis: fix types

2024-05-19T13:49:07Z

fix types

Emilgardis: use reworked data parameters

2024-05-19T12:54:15Z

use reworked data parameters

@@ Line 66: / Line 66: @@
 * n = Moles per tick
 * R = Gas constant (8.3144)
-* T = Room temperature
+* T = Room temperature (Kelvin)
 (These do not take into account the constraints imposed by "PressureExternal" and "PressureInternal")

@@ Line 29: / Line 29: @@
 The Active Vent moves gas between the connected [[Pipe Network]] and the atmosphere surrounding the active vent.
-It requires electric power to work (100 Watt).
+It requires electric power to work (100 Watts).
-The "PressureExternal" value is a measure of the atmosphere surrounding the active vent.
+The "PressureExternal" value limits the pressure of the atmosphere surrounding the active vent, preventing operation if reached.
-The "PressureInternal" value is a measure of the pressure inside the active vent pipe network.
+The "PressureInternal" value limits the pressure inside the active vent pipe network, preventing operation if reached.
-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.
+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 (1 atm/0 Pa for pumping into the room, 0 Pa/500 atm for pumping into the pipe), so they must be set (if at all) *after* setting the Mode.
 * 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".
@@ Line 48: / Line 48: @@
 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 Venus 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" and "PressureInternal" values can be modified using [[Kit (Logic I/O)|logic chips]] or programmatically via IC10 scripts.
@@ Line 61: / Line 61: @@
 n = (P * V) / (R * T)
-Where (Inward vent):
+Where:
-* P = Room pressure (Min 10.1325 kPa)
+* P = Room pressure (or Max pumping rate: 10 kPa/tick into the volume of the grid the vent is in)
-* V = 8000 litres
+* V = Volume of the grid the vent is in (8000 L for an empty grid)
 * n = Moles per tick
 * R = Gas constant (8.3144)
 * T = Room temperature
 (These do not take into account the constraints imposed by "PressureExternal" and "PressureInternal")

@@ Line 1: / Line 1: @@
 <languages />
 <translate>
 {{Itembox
 | name = Kit (Active Vent)
@@ Line 26: / Line 24: @@
 | item_rec1 = [[Kit (Active Vent)]]
 }}
-== Description == <!--T:2-->
+== Description ==
 The Active Vent moves gas between the connected [[Pipe Network]] and the atmosphere surrounding the active vent.

@@ Line 109: / Line 109: @@
 {{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|ReferenceId|Integer|w=0|Unique Reference Identifier for this object}}
 {{Data Parameters/row|NameHash|Integer|w=0|Provides the hash value for the name of the object as a 32 bit integer.}}

@@ Line 42: / Line 42: @@
 '''Note''': Use this to remember visually what Color means which Mode when looking at the Active Vent:
 *Blue == Blow
-'''Note''': Use this to remember which "Mode" logic type value related is to inward or outward:
+'''Note''': Use this to remember which "Mode" logic type value is related to inward or outward:
 *Mode 0 == outward == <code>0utward</code>
 *Mode 1 == inward == <code>1nward</code>

@@ Line 56: / Line 56: @@
 Where (Inward vent):
-* P = Min(Room pressure, 10.1325 kPa)
+* P = Room pressure (Min 10.1325 kPa)
 * V = 8000 litres
 * n = Moles per tick
@@ Line 63: / Line 63: @@
 Where (Outward vent):
-* P = Min(Pipe pressure, 10.1325 kPa)
+* P = Pipe pressure (Min 10.1325 kPa)
 * V = Pipe volume in litres
 * n = Moles per tick

@@ Line 88: / Line 88: @@
 {{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|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|PressureExternal|Integer|<div>"Outward" mode: Maximum pressure of the surrounding atmosphere. The default value is 101.325 (kPa)<br>
+{{Data Parameters/row|PressureExternal|Float|<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>}}
-{{Data Parameters/row|PressureInternal|Integer|<div>"Outward" mode: Minimum pipe network pressure. The default value is 0 (kPa).<br>
+{{Data Parameters/row|PressureInternal|Float|<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>}}
 {{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|Maximum|Integer|w=0|Maximum setting of the device}}
-{{Data Parameters/row|Ratio|Integer|w=0|Context specific value depending on device, 0 to 1 based ratio}}
+{{Data Parameters/row|Ratio|Float|w=0|Context specific value depending on device, 0 to 1 based ratio|0.0 to 1.0}}
-{{Data Parameters/row|On|Integer|The current state of the Active Vent.|multiple=2|0|On|1|Off}}
+{{Data Parameters/row|On|Boolean|The current state of the Active Vent.|multiple=2|0|Off|1|On}}
 {{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|ReferenceId|Integer|w=0|Unique Reference Identifier for this object}}