diff --git a/specifications/datamodel_b07_tc.md b/specifications/datamodel_b07_tc.md
index 8d06925..07a2c0b 100644
--- a/specifications/datamodel_b07_tc.md
+++ b/specifications/datamodel_b07_tc.md
@@ -178,6 +178,9 @@ This is another object that represents the author of the dataset. Please note, t
 
 ### Valve[_PipingComponent_]
 
+- valve_type
+  - Type: string
+  - Description: Type of valve, e.g. 3-way ball valve.
 
 ### PipingNetworkSegment