IfcValveType

Definition from IAI: The element type IfcValveType defines a list of commonly shared property set definitions of a valve and an optional set of product representations. It is used to define a valve specification (i.e. the specific product information, that is common to all occurrences of that product type).

> NOTE: The product representations are defined as representation maps (at the level of the supertype IfcTypeProduct) which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item[1] being an IfcMappedItem.

A valve type is used to define the common properties of a valve that may be applied to many occurrences of that type. Valves are typically is used in a building services piping distribution system to control or modulate the flow of the fluid. Valve types (or the instantiable subtypes) may be exchanged without being already assigned to occurrences.

The occurrences of the IfcValveType are represented by instances of IfcFlowController or its subtypes.

Property Set Use Definition:

The property sets relating to this entity are defined by the IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. It is accessible by the inverse IsDefinedBy relationship. The following property set definitions specific to this entity are part of this IFC release:

- Pset_ValveTypeCommon: common property set for all valve types

- Pset_ValveTypeAirRelease: property set for air release valve types

- Pset_ValveTypeDrawOffCock: property set for draw off cock valve types

- Pset_ValveTypeFaucet: property set for faucet valve types

- Pset_ValveTypeFlushing: property set for flushing valve types

- Pset_ValveTypeGasTap: property set for gas tap valve types

- Pset_ValveTypeIsolating: property set for isolating valve types

- Pset_ValveTypeMixing: property set for mixing valve types

- Pset_ValveTypePressureReducing: property set for pressure reducing valve types

- Pset_ValveTypePressureRelief: property set for pressure relief valve types

> HISTORY: New entity in IFC Release 2x2.

EXPRESS specification:

ENTITY IfcValveType
SUBTYPE OF ( | IfcFlowControllerType);
PredefinedType | : | IfcValveTypeEnum;
WHERE
WR1 | : | (PredefinedType <> IfcValveTypeEnum.USERDEFINED) OR ((PredefinedType = IfcValveTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

Attribute definitions:

PredefinedType | : | The type of valve.

Inheritance graph

ENTITY IfcValveType;
ENTITY IfcRoot;
GlobalId | : | IfcGloballyUniqueId;
OwnerHistory | : | IfcOwnerHistory;
Name | : | OPTIONAL IfcLabel;
Description | : | OPTIONAL IfcText;
ENTITY IfcObjectDefinition;
INVERSE
HasAssignments | : | SET OF IfcRelAssigns FOR RelatedObjects;
IsDecomposedBy | : | SET OF IfcRelDecomposes FOR RelatingObject;
Decomposes | : | SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;
HasAssociations | : | SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcTypeObject;
ApplicableOccurrence | : | OPTIONAL IfcLabel;
HasPropertySets | : | OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
INVERSE
ObjectTypeOf | : | SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct;
RepresentationMaps | : | OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag | : | OPTIONAL IfcLabel;
ENTITY IfcElementType;
ElementType | : | OPTIONAL IfcLabel;
ENTITY IfcDistributionElementType;
ENTITY IfcDistributionFlowElementType;
ENTITY IfcFlowControllerType;
ENTITY IfcValveType;
PredefinedType | : | IfcValveTypeEnum;
END_ENTITY;