← Class ReferenceReferência de Classes
exported equivalent COPI_0000145
Relief Valve
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000145
Generated onGerado em 2026-04-13
Natural Language DefinitionDefinição em Linguagem Natural
EN
A relief valve is a valve that is designed to automatically open at a predetermined pressure setpoint to relieve excess pressure and prevent unsafe pressure levels in a system.
PT-BR
Uma válvula de alívio é uma válvula projetada para abrir automaticamente em um ponto de ajuste de pressão predeterminado para aliviar o excesso de pressão e prevenir níveis de pressão inseguros em um sistema.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every relief valve is a valve that bears a pressure relief function, which realizes a pressure relief process that automatically opens the valve when system pressure exceeds a predetermined setpoint.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (ReliefValve(x) ↔ Valve(x) ∧ ∃f (PressureReliefFunction(f) ∧ bearerOf(x,f))) — Steps 1–3: genus + identity-giving function [Function axiom: PressureReliefFunction]∀f (PressureReliefFunction(f) → ∀p (realizedIn(f,p) → PressureReliefProcess(p)) ∧ ∃p (PressureReliefProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((ReliefValve(x) ∧ PressureReliefFunction(f) ∧ bearerOf(x,f)) → ∃m (FluidPortion(m) ∧ participatesIn(m,f)) ∧ ∃e (FluidPortion(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: ReliefValve <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 :PressureReliefFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :PressureReliefProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :PressureReliefProcess ] ; rdfs:label "pressure relief function"@en ; rdfs:label "função de alívio de pressão"@pt-br . ### Process type :PressureReliefProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "pressure relief process"@en ; rdfs:label "processo de alívio de pressão"@pt-br . :PressureReliefProcess 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: ReliefValve :ReliefValve 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 :PressureReliefFunction ] ) ] ; rdfs:label "relief valve"@en ; rdfs:label "válvula de alívio"@pt-br ; iof-av:naturalLanguageDefinition "A relief valve is a valve that is designed to automatically open at a predetermined pressure setpoint to relieve excess pressure and prevent unsafe pressure levels in a system."@en ; skos:definition "A relief valve is a valve that is designed to automatically open at a predetermined pressure setpoint to relieve excess pressure and prevent unsafe pressure levels in a system."@en ; iof-av:naturalLanguageDefinition "Uma válvula de alívio é uma válvula projetada para abrir automaticamente em um ponto de ajuste de pressão predeterminado para aliviar o excesso de pressão e prevenir níveis de pressão inseguros em um sistema."@pt-br ; iof-av:semiFormalNaturalLanguageAxiom "Every relief valve is a valve that bears a pressure relief function, which realizes a pressure relief process that automatically opens the valve when system pressure exceeds a predetermined setpoint."@en ; iof-av:firstOrderLogicAxiom "∀x (ReliefValve(x) ↔ (Valve(x) ∧ ∃f (PressureReliefFunction(f) ∧ bearerOf(x,f))))"@en ; # Disjointness: ReliefValve and CheckValve [] rdf:type owl:AllDisjointClasses ; owl:members ( :ReliefValve :CheckValve ) . # Disjointness: ReliefValve and IsolationValve [] rdf:type owl:AllDisjointClasses ; owl:members ( :ReliefValve :IsolationValve ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
PressureReliefFunction ⊑ DesignedFunction
Realized in
PressureReliefProcess ⊑ PlannedProcess
The identity-giving function is the automatic opening at a predetermined pressure setpoint to prevent unsafe pressure levels. This is distinct from general flow control (which is bidirectional and controlled) or pressure reduction (which is continuous). Pressure relief is a safety function that activates only when system pressure exceeds safe limits.
2 Genus DeterminationDeterminação do Gênero
Valvebfo:Object (BFO_0000030)
All sources consistently identify relief valve as a type of valve. The parent_candidates list includes 'Valve' which is already enriched in our ontology with function FlowControlFunction and genus MaterialArtifact. Relief valve inherits the basic valve characteristics (flow control capability, valve body, closure mechanism) but specializes for automatic pressure relief rather than general flow control.
3 Differentia SpecificaDiferença Específica
∃bearerOf.PressureReliefFunction

Designed to automatically open at a predetermined pressure setpoint to relieve excess pressure and prevent unsafe pressure levels in a system.

The differentia is the specific PressureReliefFunction which is a specialization of the inherited FlowControlFunction. This automatic pressure-triggered opening behavior distinguishes relief valves from all other valve types that either require external control signals or respond to different physical phenomena.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

Beyond the basic valve components inherited from Valve (valve body, closure member), relief valves universally require a pressure set mechanism and pressure sensing element to realize their automatic pressure relief function. The specific implementation varies by subtype (spring vs pilot-operated) but these functional parts are universal.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'at or above relief pressure setpoint'}
OutputsSaídas
{'type': 'FluidPortion', 'count': 1, 'constraints': 'at reduced pressure, discharged to safe location'}
TransformationTransformação
pressure energy released through controlled discharge
Relief valves transform high-pressure fluid input into lower-pressure discharged output, releasing excess pressure energy to prevent system damage. The transformation is triggered automatically when input pressure exceeds the predetermined setpoint.
Disjoint WithDisjunto com
CheckValve IsolationValve
C2: CheckValve, IsolationValve. CheckValve prevents backflow based on pressure differential direction, incompatible with pressure level-triggered opening. IsolationValve provides complete flow blockage, incompatible with automatic pressure relief discharge function.
MetadataMetadados
COPI IDCOPI IDCOPI_0000145
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000145
StatusStatusexported
Axiom modeModoequivalent
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 modeModoequivalent
FunctionFunçãoPressureReliefFunction
ProcessProcessoPressureReliefProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 5 sources
ISO 15926-4 RELIEF 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 relief 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 relief 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 Relief 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 Relief 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.