IfcValveType

Definition from IAI: The element type IfcValveType defines a list of commonly shared property set definitions of an element and an optional set of product representations. It is used to define an element 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_ValveTypeAirRelease: 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;