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exported equivalent COPI_0000105
Choke Valve
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000105
Generated onGerado em 2026-04-09
Natural Language DefinitionDefinição em Linguagem Natural
EN
A choke valve is a valve that bears a pressure reduction function, designed to reduce fluid pressure from inlet to outlet through controlled flow restriction and energy dissipation.
PT-BR
Uma válvula choke é uma válvula que possui uma função de redução de pressão, projetada para reduzir a pressão do fluido da entrada para a saída através de restrição controlada do fluxo e dissipação de energia.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every choke valve is a valve that bears a pressure reduction function and has a flow restriction element as component part at all times.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (ChokeValve(x) ↔ Valve(x) ∧ ∃f (PressureReductionFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: PressureReductionFunction]∀f (PressureReductionFunction(f) → ∀p (realizedIn(f,p) → PressureReductionProcess(p)) ∧ ∃p (PressureReductionProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((ChokeValve(x) ∧ PressureReductionFunction(f) ∧ bearerOf(x,f)) → ∃m (PortionOfFluid(m) ∧ participatesIn(m,f)) ∧ ∃e (PortionOfFluid(e) ∧ participatesIn(e,f)) ∧ processType(f,PressureReduction)) — Step 5: typed participants in the realising process
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: ChokeValve <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 "2026-10-07"^^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 :PressureReductionFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :PressureReductionProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :PressureReductionProcess ] ; rdfs:label "pressure reduction function"@en ; rdfs:label "função de redução de pressão"@pt-br . ### Process type :PressureReductionProcess rdf:type owl:Class ; rdfs:subClassOf :FlowControl ; rdfs:label "pressure reduction process"@en ; rdfs:label "processo de redução de pressão"@pt-br . :FlowControl rdf:type owl:Class . :PressureReductionProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :PortionOfFluid ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :PortionOfFluid ] . ### Equipment universal: ChokeValve :ChokeValve rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( :Valve [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :PressureReductionFunction ] ) ] ; rdfs:label "choke valve"@en ; rdfs:label "válvula choke"@pt-br ; iof-av:naturalLanguageDefinition "A choke valve is a valve that bears a pressure reduction function, designed to reduce fluid pressure from inlet to outlet through controlled flow restriction and energy dissipation."@en ; skos:definition "A choke valve is a valve that bears a pressure reduction function, designed to reduce fluid pressure from inlet to outlet through controlled flow restriction and energy dissipation."@en ; iof-av:naturalLanguageDefinition "Uma válvula choke é uma válvula que possui uma função de redução de pressão, projetada para reduzir a pressão do fluido da entrada para a saída através de restrição controlada do fluxo e dissipação de energia."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every choke valve is a valve that bears a pressure reduction function and has a flow restriction element as component part at all times."@en ; iof-av:firstOrderLogicAxiom "∀x (ChokeValve(x) ↔ (Valve(x) ∧ ∃f (PressureReductionFunction(f) ∧ bearerOf(x,f))))"@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
PressureReductionFunction ⊑ DesignedFunction
Realized in
PressureReductionProcess ⊑ FlowControl
The identity-giving function is pressure reduction through controlled flow restriction and energy dissipation. This is distinct from general flow control (which can maintain, increase, or decrease flow/pressure) - choke valves are specifically designed to reduce pressure from inlet to outlet through flow impingement and energy dissipation mechanisms.
2 Genus DeterminationDeterminação do Gênero
Valvebfo:Object (BFO_0000030)
All sources consistently identify choke valve as a subtype of valve. The parent_candidates list includes 'VALVE' from iso15926, confirming this genus choice. Valve is already enriched in our ontology with FlowControlFunction and MaterialArtifact as its BFO root, making it the most specific appropriate superclass.
3 Differentia SpecificaDiferença Específica
∃bearerOf.PressureReductionFunction

A choke valve is distinguished from other valves by its specific function to reduce fluid pressure from inlet to outlet through controlled flow restriction and energy dissipation.

The differentia is the pressure reduction function, which is a specialized subtype of the general flow control function inherited from Valve. This captures the essential characteristic that distinguishes choke valves from all other valve types - their specific design purpose to reduce pressure through flow restriction and energy dissipation.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

The flow restriction element is the only universal necessary part beyond what is inherited from Valve. The specific type of restriction element (cage, needle, sleeve) varies by subtype and should be modeled at the subtype level.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'PortionOfFluid', 'count': 1, 'constraints': 'high pressure'}
OutputsSaídas
{'type': 'PortionOfFluid', 'count': 1, 'constraints': 'reduced pressure, same phase'}
TransformationTransformação
pressure reduction through flow restriction and energy dissipation
Choke valves take a single high-pressure fluid stream and output the same fluid at reduced pressure. The transformation is purely pressure reduction through mechanical energy dissipation, maintaining the same fluid composition and typically the same phase.
MetadataMetadados
COPI IDCOPI IDCOPI_0000105
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000105
StatusStatusexported
Axiom modeModoequivalent
CreatedCriado2026-04-09
UpdatedAtualizado2026-09-08
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-10-07
ISA 5.1-2022 — wikimedia/valve.svg
Quick factsDados rápidos
GenusGêneroValve
Root classClasse raizMaterialArtifact
Axiom modeModoequivalent
FunctionFunçãoPressureReductionFunction
ProcessProcessoPressureReductionProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 3 sources
ISO 15926-4 CHOKE VALVE
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
CFIHOS choke valve
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
POSC Caesar Choke Valve
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
Provenance tiersCamadas de proveniência
primarystandardverbatimiso15926
A <CHOKE VALVE> is an <ARTEFACT> and a <VALVE> in which a solid cylinder is raised and lowered, and which is placed around or inside another cylinder that has holes or slots. The design of a choke valve means fluids flowing through the cage are coming from all sides and that the streams of flow (through the holes or slots) collide with each other at the center of the cage cylinder, thereby dissipating the energy of the fluid through flow impingement. The main advantage of choke valves is that they can be designed to be totally linear in their flow rate
secondarystandardverbatimcfihos
A valve that can be used to obstruct the fluid passing inside, and has the ability to reduce the pressure from the inlet port to the outlet port.
secondarystandardverbatimposc_caesar
A valve that can be used to obstruct the fluid passing inside, and has the ability to reduce the pressure from the inlet port to the outlet port.

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