IfcValveTypeEnum

Definition from IAI: 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. The IfcValveTypeEnum contains:

- 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 (BS6100 330 4104)
- 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).
- DOUBLECHECK: An assembly that incorporates two valves used to prevent backflow (BS6100 330 4106).
- DOUBLEREGULATING: Valve used to facilitate regulation of fluid flow in a system.
- DRAWOFFCOCK: A valve used to remove fluid from a piping 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.

> HISTORY: New type in IFC R2.0

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;