IfcValveTypeEnum

BACnet MVD

#### IfcValveTypeEnum

Natural language names

| Valve Type Enum
| Enumération des types de vanne

##### 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

XML 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

`

References: IfcValve IfcValveType

Link to this page