IfcValveTypeEnum

Semantic definitions at the type

Type definition

The IfcValveTypeEnum defines the range of different types of valve that can be specified. These are typically used in conjunction with Pset_ValveTypeCommon, which contains common properties for all valve types.

HISTORY New type in IFC2.0.

Enumeration definition

Constant	Description
AIRRELEASE	Valve used to release air from a pipe or fitting.
ANTIVACUUM	Valve that opens to admit air if the pressure falls below atmospheric pressure.
CHANGEOVER	Valve that enables flow to be switched between pipelines (3 or 4 port).
CHECK	Valve that permits water to flow in one direction only and is enclosed when there is no flow (2 port).
COMMISSIONING	Valve used to facilitate commissioning of a system (2 port).
DIVERTING	Valve that enables flow to be diverted from one branch of a pipeline to another (3 port).
DRAWOFFCOCK	A valve used to remove fluid from a piping system.
DOUBLECHECK	An assembly that incorporates two valves used to prevent backflow.
DOUBLEREGULATING	Valve used to facilitate regulation of fluid flow in a system.
FAUCET	Faucet valve typically used as a flow discharge.
FLUSHING	Valve that flushes a predetermined quantity of water to cleanse a toilet, urinal, etc.
GASCOCK	Valve that is used for controlling the flow of gas.
GASTAP	Gas tap typically used for venting or discharging gas from a system.
ISOLATING	Valve that closes off flow in a pipeline.
MIXING	Valve that enables flow from two branches of a pipeline to be mixed together (3 port).
PRESSUREREDUCING	Valve that reduces the pressure of a fluid immediately downstream of its position in a pipeline to a preselected value or by a predetermined ratio.
PRESSURERELIEF	Spring or weight loaded valve that automatically discharges to a safe place fluid that has built up to excessive pressure in pipes or fittings.
REGULATING	Valve used to facilitate regulation of fluid flow in a system.
SAFETYCUTOFF	Valve that closes under the action of a safety mechanism such as a drop weight, solenoid etc.
STEAMTRAP	Valve that restricts flow of steam while allowing condensate to pass through.
STOPCOCK	An isolating valve used on a domestic water service.
USERDEFINED	User-defined valve type.
NOTDEFINED	Undefined valve type.

Formal representations

XSD Specification

 <xs:simpleType name="IfcValveTypeEnum">

  <xs:restriction base="xs:string">

   <xs:enumeration value="airrelease"/>

   <xs:enumeration value="antivacuum"/>

   <xs:enumeration value="changeover"/>

   <xs:enumeration value="check"/>

   <xs:enumeration value="commissioning"/>

   <xs:enumeration value="diverting"/>

   <xs:enumeration value="drawoffcock"/>

   <xs:enumeration value="doublecheck"/>

   <xs:enumeration value="doubleregulating"/>

   <xs:enumeration value="faucet"/>

   <xs:enumeration value="flushing"/>

   <xs:enumeration value="gascock"/>

   <xs:enumeration value="gastap"/>

   <xs:enumeration value="isolating"/>

   <xs:enumeration value="mixing"/>

   <xs:enumeration value="pressurereducing"/>

   <xs:enumeration value="pressurerelief"/>

   <xs:enumeration value="regulating"/>

   <xs:enumeration value="safetycutoff"/>

   <xs:enumeration value="steamtrap"/>

   <xs:enumeration value="stopcock"/>

   <xs:enumeration value="userdefined"/>

   <xs:enumeration value="notdefined"/>

  </xs:restriction>

 </xs:simpleType>

EXPRESS Specification


TYPE IfcValveTypeEnum = ENUMERATION OF (

 AIRRELEASE, 
 ANTIVACUUM, 
 CHANGEOVER, 
 CHECK, 
 COMMISSIONING, 
 DIVERTING, 
 DRAWOFFCOCK, 
 DOUBLECHECK, 
 DOUBLEREGULATING, 
 FAUCET, 
 FLUSHING, 
 GASCOCK, 
 GASTAP, 
 ISOLATING, 
 MIXING, 
 PRESSUREREDUCING, 
 PRESSURERELIEF, 
 REGULATING, 
 SAFETYCUTOFF, 
 STEAMTRAP, 
 STOPCOCK, 
 USERDEFINED, 
 NOTDEFINED);
END_TYPE;


 EXPRESS-G diagram

	Valve Type Enum
	Enumération des types de vanne