exported
necessary
eductor
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Eductor
Generated on 2026-04-16
Natural Language Definition
EN
An eductor is a pump that uses a high-pressure motive fluid jet to create a low-pressure zone that entrains and moves a second fluid via momentum transfer.
PT-BR
Um edutor é uma bomba que usa um jato de fluido motriz de alta pressão para criar uma zona de baixa pressão que arrasta e move um segundo fluido via transferência de momento.
Formal Axioms
Semi-formal (Aristotelian)
Every eductor is a pump that has a motive fluid nozzle and Ventura throat as component parts and participates in a jet entrainment process.
First-Order Logic Theory
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▸ Stored override
∀x(Eductor(x) → Pump(x) ∧ ∃n(MotiveFluidNozzle(n) ∧ hasComponentPartAtAllTimes(x,n)) ∧ ∃t(VenturaThroat(t) ∧ hasComponentPartAtAllTimes(x,t)) ∧ ∃p(JetEntrainmentProcess(p) ∧ participatesIn(x,p)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: Eductor
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000066 rdf:type owl:Class ; # PumpingFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000616 # PumpingProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000616 # PumpingProcess
] ;
rdfs:label "pumping function"@en ;
rdfs:label "função de bombeamento"@pt-br .
### Process type
:COPI_0000616 rdf:type owl:Class ; # PumpingProcess
rdfs:subClassOf :COPI_0000003 ; # MomentumTransfer
rdfs:label "pumping process"@en ;
rdfs:label "processo de bombeamento"@pt-br .
:COPI_0000003 rdf:type owl:Class . # MomentumTransfer
:COPI_0000616 # PumpingProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000038 # PortionOfLiquid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000044 # FluidMixture
] .
### Equipment universal: Eductor
:COPI_0000259 rdf:type owl:Class ; # Eductor
rdfs:subClassOf :COPI_0000072 ; # Pump
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000066 # PumpingFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000658 # SuctionPort
] ;
rdfs:label "eductor"@en ;
rdfs:label "edutor"@pt-br ;
iof-av:naturalLanguageDefinition "An eductor is a pump that uses a high-pressure motive fluid jet to create a low-pressure zone that entrains and moves a second fluid via momentum transfer."@en ;
skos:definition "An eductor is a pump that uses a high-pressure motive fluid jet to create a low-pressure zone that entrains and moves a second fluid via momentum transfer."@en ;
iof-av:naturalLanguageDefinition "Um edutor é uma bomba que usa um jato de fluido motriz de alta pressão para criar uma zona de baixa pressão que arrasta e move um segundo fluido via transferência de momento."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every eductor is a pump that has a motive fluid nozzle and Ventura throat as component parts and participates in a jet entrainment process."@en ;
iof-av:firstOrderLogicAxiom "∀x(Eductor(x) → Pump(x) ∧ ∃n(MotiveFluidNozzle(n) ∧ hasComponentPartAtAllTimes(x,n)) ∧ ∃t(VenturaThroat(t) ∧ hasComponentPartAtAllTimes(x,t)) ∧ ∃p(JetEntrainmentProcess(p) ∧ participatesIn(x,p)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "The constructive differentia based on jet entrainment mechanism could potentially apply to hybrid or specialized equipment that incorporates eductor principles but should not be automatically classified as a standard eductor type. Under OWA, necessary conditions protect against false positive classifications."@en ;
skos:definition "[ISO 15926-4] An <EDUCTOR> is an <ARTEFACT> and a <PUMP> that is a form of suction pump; a device using a high pressure jet of water to create partial vacuum at an intake opening to draw liquid from a sump"@en ;
skos:definition "[CFIHOS] A form of suction pump; a device using a high pressure jet of water to create partial vacuum at an intake opening to draw liquid from a sump."@en ;
skos:definition "[OnePetro] A device that through flow of a power fluid through a nozzle, creates a low pressure area useful for moving fluids."@en .
:COPI_0000658 rdf:type owl:Class ; # SuctionPort
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "bocal de sucção"@pt-br ;
rdfs:label "suction port"@en .
# Disjointness: Eductor and CentrifugalPump
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000259 :COPI_0000102 ) . # Eductor, CentrifugalPump
# Disjointness: Eductor and PositiveDisplacementPump
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000259 :COPI_0000331 ) . # Eductor, PositiveDisplacementPump
Axiomatization Decision Log
1
Identity-Giving Function
Function class
PumpingFunction
⊑ DesignedFunction
Realized in
PumpingProcess
⊑ MomentumTransfer
All sources identify eductor as a type of pump that moves fluids. The generic PumpingFunction already exists in the enriched classes and captures the fundamental fluid-moving purpose shared with other pump types.
2
Genus Determination
Pump
ISO 15926 explicitly states 'EDUCTOR is a PUMP'. The parent candidates include PUMP which is already enriched in our ontology. Pump is the most specific appropriate superclass - more specific than the generic Assembly but captures the shared pumping function with other pump types.
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| SuctionPort | MaterialArtifact | hasComponentPartAtAllTimes |
These four parts constitute the minimal complete eductor assembly that enables the jet entrainment pumping mechanism described in all source definitions.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— motive fluid, typically water
PortionOfLiquid
— pumped fluid from sump or low-pressure source
Outputs (O)
FluidMixture
— combined motive and pumped fluids at intermediate pressure
Transformation (T)
momentum transfer from high-pressure motive fluid to low-pressure pumped fluid via jet entrainment
Eductors require two distinct fluid inputs (motive and pumped) and produce a single mixed output, distinguishing them from single-input pumps like centrifugal or positive displacement types.
5
Axiom Mode Decision
Necessary conditions only
— modelled as a primitive universal
(⊑, SubClassOf). Identity is grounded in designed
function and cannot be reduced to a property checklist.
The constructive differentia based on jet entrainment mechanism could potentially apply to hybrid or specialized equipment that incorporates eductor principles but should not be automatically classified as a standard eductor type. Under OWA, necessary conditions protect against false positive classifications.
Disjointness Axioms
CentrifugalPump
PositiveDisplacementPump
C1: CentrifugalPump, PositiveDisplacementPump. Incompatible pumping mechanisms - jet entrainment cannot simultaneously operate via rotating impeller or volumetric displacement principles
Cross-Standard Observations
All three sources consistently describe the jet-based suction mechanism. ISO 15926 and CFIHOS specifically mention water as the motive fluid, while OnePetro uses the more general term 'power fluid', suggesting broader applicability to different motive fluid types.
