diff --git a/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour.elmt b/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour.elmt
deleted file mode 100644
index 1a2b708c7..000000000
--- a/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour.elmt
+++ /dev/null
@@ -1,25 +0,0 @@
-<definition width="60" version="0.3" hotspot_x="10" hotspot_y="10" height="40" type="element" orientation="dyyy">
-    <names>
-        <name lang="en">Non-return valve</name>
-        <name lang="fr">Clapet anti-retour</name>
-        <name lang="pl">Zawór zwrotny</name>
-    </names>
-    <informations></informations>
-    <description>
-        <circle x="7" y="-3" antialias="true" style="line-style:normal;line-weight:normal;filling:none;color:black" diameter="6"/>
-        <input x="-4" y="21" size="9" rotate="true" text="_"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="19" y2="6" x2="21"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="16" y2="-6" x2="19"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="13" y2="-6" x2="14"/>
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-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="24" y2="6" x2="26"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="21" y2="-6" x2="24"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="26" y2="0" x2="28"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="36" y2="0" x2="13"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="6" y2="0" x2="0"/>
-        <terminal x="0" y="0" orientation="w"/>
-        <terminal x="36" y="0" orientation="e"/>
-    </description>
-</definition>
diff --git a/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour_pilote.elmt b/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour_pilote.elmt
deleted file mode 100644
index 73dd65949..000000000
--- a/elements/mecanique/pneumatique/Accessoires/clapet_anti_retour_pilote.elmt
+++ /dev/null
@@ -1,31 +0,0 @@
-<definition width="80" version="0.3" hotspot_x="10" hotspot_y="40" height="60" type="element" orientation="dyyy">
-    <names>
-        <name lang="en">Pilot-operated non-return valve</name>
-        <name lang="fr">Clapet anti-retour piloté</name>
-        <name lang="pl">Zawór zwrotny sterowany, otwierany cisnieniem</name>
-    </names>
-    <informations></informations>
-    <description>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:dotted;line-weight:normal;filling:none;color:black" y1="3" x1="20" y2="10" x2="12"/>
-        <rect width="40" x="10" y="-10" antialias="false" height="25" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <input x="4" y="-22" size="9" rotate="true" text="_"/>
-        <circle x="20" y="-3" antialias="true" style="line-style:normal;line-weight:normal;filling:none;color:black" diameter="6"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="33" y2="6" x2="35"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="30" y2="-6" x2="33"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="26" y2="-6" x2="28"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="28" y2="6" x2="30"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="25" y2="0" x2="19"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="19" y2="6" x2="25"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-6" x1="38" y2="6" x2="40"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="35" y2="-6" x2="38"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="6" x1="40" y2="0" x2="41"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="60" y2="0" x2="27"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="19" y2="0" x2="0"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="10" x1="6" y2="10" x2="12"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="10" x1="0" y2="10" x2="3"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="3" x1="20" y2="2" x2="21"/>
-        <terminal x="0" y="10" orientation="w"/>
-        <terminal x="0" y="0" orientation="w"/>
-        <terminal x="60" y="0" orientation="e"/>
-    </description>
-</definition>
diff --git a/elements/mecanique/pneumatique/Accessoires/limiteur_debit_bidirection.elmt b/elements/mecanique/pneumatique/Accessoires/limiteur_debit_bidirection.elmt
deleted file mode 100644
index e063a4c2a..000000000
--- a/elements/mecanique/pneumatique/Accessoires/limiteur_debit_bidirection.elmt
+++ /dev/null
@@ -1,19 +0,0 @@
-<definition width="100" version="0.2" hotspot_x="10" hotspot_y="20" height="50" type="element" orientation="dyyy" >
-    <names>
-        <name lang="en" >Throttle valves</name>
-        <name lang="fr" >Limiteurs de débit</name>
-    </names>
-    <description>
-        <input x="66" y="18" size="9" rotate="true" text="_" />
-        <line length1="1,5" length2="2" antialias="true" end1="none" end2="triangle" style="line-style:normal;line-weight:normal;filling:black;color:black" y1="7" x1="32" y2="-11" x2="41" />
-        <arc width="20" x="24" y="-12" antialias="true" height="9" style="line-style:normal;line-weight:normal;filling:none;color:black" start="-20" angle="-140" />
-        <arc width="20" x="24" y="3" antialias="true" height="9" style="line-style:normal;line-weight:normal;filling:none;color:black" start="-200" angle="-140" />
-        <line length1="1,5" length2="1,5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="12" x1="12" y2="12" x2="60" />
-        <line length1="1,5" length2="1,5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-18" x1="12" y2="-18" x2="60" />
-        <line length1="1,5" length2="1,5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-18" x1="12" y2="12" x2="12" />
-        <line length1="1,5" length2="1,5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-18" x1="60" y2="12" x2="60" />
-        <line length1="1,5" length2="1,5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="0" y2="0" x2="72" />
-        <terminal x="72" y="0" orientation="e" />
-        <terminal x="0" y="0" orientation="w" />
-    </description>
-</definition>
diff --git a/elements/mecanique/pneumatique/Accessoires/limiteur_debit_unidirection.elmt b/elements/mecanique/pneumatique/Accessoires/limiteur_debit_unidirection.elmt
deleted file mode 100644
index 010bb49d7..000000000
--- a/elements/mecanique/pneumatique/Accessoires/limiteur_debit_unidirection.elmt
+++ /dev/null
@@ -1,32 +0,0 @@
-<definition width="80" version="0.3" hotspot_x="10" hotspot_y="20" height="60" type="element" orientation="dyyy">
-    <names>
-        <name lang="en">Check-choke valves</name>
-        <name lang="fr">Limiteurs de débit unidirectionnel</name>
-        <name lang="pl">Zawór dławiący, nastawialny</name>
-    </names>
-    <informations></informations>
-    <description>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="18" x1="34" y2="24" x2="28"/>
-        <circle x="27" y="15" antialias="true" style="line-style:normal;line-weight:normal;filling:none;color:black" diameter="6"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="60" y2="0" x2="0"/>
-        <arc width="20" x="20" y="-12" antialias="true" height="9" style="line-style:normal;line-weight:normal;filling:none;color:black" start="-20" angle="-140"/>
-        <input x="54" y="26" size="9" rotate="true" text="_"/>
-        <arc width="20" x="20" y="3" antialias="true" height="9" style="line-style:normal;line-weight:normal;filling:none;color:black" start="-200" angle="-140"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="18" y2="0" x2="17"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="17" y2="0" x2="18"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="42" y2="0" x2="41"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="0" x1="41" y2="0" x2="42"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-18" x1="12" y2="-18" x2="48"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="30" x1="48" y2="30" x2="12"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="30" x1="12" y2="-18" x2="12"/>
-        <line length1="1.5" length2="2" antialias="true" end1="none" end2="triangle" style="line-style:normal;line-weight:normal;filling:black;color:black" y1="5" x1="27" y2="-9" x2="34"/>
-        <line length1="1.5" length2="1.5" antialias="true" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="12" x1="28" y2="18" x2="34"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-18" x1="48" y2="30" x2="48"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="18" x1="42" y2="18" x2="34"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="circle" end2="none" style="line-style:normal;line-weight:normal;filling:black;color:black" y1="-1" x1="18" y2="18" x2="18"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="18" x1="18" y2="18" x2="27"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="circle" end2="none" style="line-style:normal;line-weight:normal;filling:black;color:black" y1="-1" x1="42" y2="18" x2="42"/>
-        <terminal x="0" y="0" orientation="w"/>
-        <terminal x="60" y="0" orientation="e"/>
-    </description>
-</definition>
diff --git a/elements/mecanique/pneumatique/Accessoires/qet_directory b/elements/mecanique/pneumatique/Accessoires/qet_directory
deleted file mode 100644
index 2b8cbde4b..000000000
--- a/elements/mecanique/pneumatique/Accessoires/qet_directory
+++ /dev/null
@@ -1,7 +0,0 @@
-<qet-directory>
-    <names>
-        <name lang="fr" >Accessoires</name>
-	<name lang="en" >Accessories</name>
-	<name lang="pl" >Osprzęt</name>
-    </names>
-</qet-directory>
diff --git a/elements/mecanique/pneumatique/Traitement_Air/vanne_arret.elmt b/elements/mecanique/pneumatique/soupapes/vanne_arret.elmt
similarity index 100%
rename from elements/mecanique/pneumatique/Traitement_Air/vanne_arret.elmt
rename to elements/mecanique/pneumatique/soupapes/vanne_arret.elmt
diff --git a/elements/mecanique/pneumatique/Accessoires/valve_echappement_rapide.elmt b/elements/mecanique/pneumatique/vannes_logiques/valve_echappement_rapide.elmt
similarity index 98%
rename from elements/mecanique/pneumatique/Accessoires/valve_echappement_rapide.elmt
rename to elements/mecanique/pneumatique/vannes_logiques/valve_echappement_rapide.elmt
index 67becb437..6d9186d69 100644
--- a/elements/mecanique/pneumatique/Accessoires/valve_echappement_rapide.elmt
+++ b/elements/mecanique/pneumatique/vannes_logiques/valve_echappement_rapide.elmt
@@ -1,7 +1,7 @@
 <definition width="100" version="0.3" hotspot_x="10" hotspot_y="30" height="60" type="element" orientation="dyyy">
     <names>
         <name lang="en">Quick exhaust valves</name>
-        <name lang="fr">Vannes d'échappement rapide</name>
+        <name lang="fr">Porte OU</name>
     </names>
     <informations></informations>
     <description>