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exported necessary COPI_0000134
Needle Valve
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000134
Generated onGerado em 2026-04-13
Natural Language DefinitionDefinição em Linguagem Natural
EN
A needle valve is a valve that has a conical needle-shaped closure member that seats into a small orifice to provide precise flow control.
PT-BR
Uma válvula agulha é uma válvula que possui um membro de fechamento cônico em forma de agulha que se assenta em um pequeno orifício para fornecer controle preciso de fluxo.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every needle valve is a valve that has a needle plug component and has a small orifice seat component.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Necessary condition]∀x (NeedleValve(x) → Valve(x) ∧ ∃f (FlowControlFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: FlowControlFunction]∀f (FlowControlFunction(f) → ∀p (realizedIn(f,p) → FlowControlProcess(p)) ∧ ∃p (FlowControlProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Structural differentia (necessary only)]∀x (NeedleValve(x) → ∃hasComponentPartAtAllTimes.NeedlePlug ⊓ ∃hasComponentPartAtAllTimes.SmallOrificeSeat) — Step 3: structural property — necessary condition, not sufficient (OWA prevents ≡) [Process participation signature]∀x ∀f ((NeedleValve(x) ∧ FlowControlFunction(f) ∧ bearerOf(x,f)) → ∃m (FluidPortion(m) ∧ participatesIn(m,f)) ∧ ∃e (FluidPortion(e) ∧ participatesIn(e,f)) ∧ processType(f,FlowRegulation)) — 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: NeedleValve <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 "1.1.0-104-g4d16eff" ; 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 "2026-07-13"^^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 :FlowControlFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :FlowControlProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :FlowControlProcess ] ; rdfs:label "flow control function"@en ; rdfs:label "função de controle de fluxo"@pt-br . ### Process type :FlowControlProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "flow control process"@en ; rdfs:label "processo de controle de fluxo"@pt-br . :FlowControlProcess rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasInput ; owl:someValuesFrom :FluidPortion ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasSpecifiedOutput ; owl:someValuesFrom :FluidPortion ] . ### Equipment universal: NeedleValve :NeedleValve rdf:type owl:Class ; rdfs:subClassOf :Valve ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :FlowControlFunction ] ; rdfs:label "needle valve"@en ; rdfs:label "válvula agulha"@pt-br ; iof-av:naturalLanguageDefinition "A needle valve is a valve that has a conical needle-shaped closure member that seats into a small orifice to provide precise flow control."@en ; skos:definition "A needle valve is a valve that has a conical needle-shaped closure member that seats into a small orifice to provide precise flow control."@en ; iof-av:naturalLanguageDefinition "Uma válvula agulha é uma válvula que possui um membro de fechamento cônico em forma de agulha que se assenta em um pequeno orifício para fornecer controle preciso de fluxo."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every needle valve is a valve that has a needle plug component and has a small orifice seat component."@en ; iof-av:firstOrderLogicAxiom "∀x(NeedleValve(x) → Valve(x) ∧ ∃y(NeedlePlug(y) ∧ hasComponentPartAtAllTimes(x,y)) ∧ ∃z(SmallOrificeSeat(z) ∧ hasComponentPartAtAllTimes(x,z)))"@en ; iof-av:isPrimitive "true"^^xsd:boolean ; iof-av:primitiveRationale "As a constructive type defined by specific structural features (needle plug geometry), providing sufficient conditions under the Open World Assumption could lead to over-classification. Complex valve assemblies or custom equipment containing needle-like mechanisms might be incorrectly classified as standard needle valves for maintenance purposes."@en ;
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
FlowControlFunction ⊑ DesignedFunction
Realized in
FlowControlProcess ⊑ PlannedProcess
A needle valve performs the same basic flow control function as other valves. While it excels at flow metering and precise control due to its needle geometry, this is a capability arising from its construction, not a distinct function type. The function is inherited from the valve genus.
2 Genus DeterminationDeterminação do Gênero
Valvebfo:Object (BFO_0000030)
Multiple sources explicitly state that a needle valve is a type of valve (ISO 15926, CFIHOS, POSC Caesar). While ISO 15926 and others mention it's a subtype of 'globe valve', the Valve class is already enriched in our ontology and represents the most appropriate genus level. Globe valve would be an intermediate classification that we can address separately.
3 Differentia SpecificaDiferença Específica
∃hasComponentPartAtAllTimes.NeedlePlug ⊓ ∃hasComponentPartAtAllTimes.SmallOrificeSeat

Has a conical needle-shaped closure member that seats into a small orifice, enabling precise flow metering and high-pressure operation.

The differentia captures the two essential structural features consistently mentioned across sources: the needle-shaped (conical) plug and the small seat/orifice. This combination enables the characteristic precise flow control and high-pressure capabilities mentioned in the definitions.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

These parts constitute the essential structural differentia of needle valves. The needle plug and small orifice seat work together to provide the precise flow control characteristic of this valve type.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'any phase, typically high pressure'}
OutputsSaídas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'controlled flow rate, potentially reduced pressure'}
TransformationTransformação
precise flow rate control through variable orifice area
Needle valves provide precise flow control by varying the effective orifice area as the needle is positioned. They are particularly suited for low flow rates and high-pressure applications due to the small orifice design.
MetadataMetadados
COPI IDCOPI IDCOPI_0000134
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000134
StatusStatusexported
Axiom modeModonecessary
CreatedCriado2026-04-13
UpdatedAtualizado2026-06-25
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
ISA 5.1-2022 — wikimedia/valve.svg
Quick factsDados rápidos
GenusGêneroValve
Root classClasse raizMaterialArtifact
Axiom modeModonecessary
FunctionFunçãoFlowControlFunction
ProcessProcessoFlowControlProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 5 sources
ISO 15926-4 NEEDLE 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 needle 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.
SLB Glossary needle 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.
ONEPETRO_GLOSSARY Needle 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 Needle 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.