exported
equivalent
on-off control valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#On-Offcontrolvalve
Generated on 2026-05-02
Natural Language Definition
EN
An on-off control valve is a control valve that bears a binary flow control function, having only two defined positions: fully open and fully closed.
PT-BR
Uma válvula de controle liga-desliga é uma válvula de controle que possui uma função de controle de fluxo binária, tendo apenas duas posições definidas: totalmente aberta e totalmente fechada.
Formal Axioms
Semi-formal (Aristotelian)
Every on-off control valve is a control valve that has a BinaryFlowControlFunction and has component part a BinaryPositioner.
First-Order Logic Theory
Loading…
▸ Stored override
∀x(OnOffControlValve(x) ↔ ControlValve(x) ∧ ∃f(BinaryFlowControlFunction(f) ∧ bearerOf(x,f)))
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: OnOffControlValve
<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 "2026-10-09"^^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_0000162 rdf:type owl:Class ; # BinaryFlowControlFunction
rdfs:subClassOf :COPI_0000027 ; # ProcessControlledFlowFunction
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000416 # BinaryFlowControlProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000416 # BinaryFlowControlProcess
] ;
rdfs:label "binary flow control function"@en ;
rdfs:label "função de controle binário de fluxo"@pt-br ;
iof-av:naturalLanguageDefinition "A designed function borne by petroleum production equipment whose realization constitutes the complete opening or closing of a flow path to allow or prevent fluid passage."@en ;
skos:definition "A designed function borne by petroleum production equipment whose realization constitutes the complete opening or closing of a flow path to allow or prevent fluid passage."@en ;
iof-av:naturalLanguageDefinition "Uma função projetada portada por equipamento de produção de petróleo cuja realização consiste na abertura ou no fechamento completo de uma passagem de escoamento para permitir ou impedir a passagem de fluido."@pt-br .
:COPI_0000027 rdf:type owl:Class ; # ProcessControlledFlowFunction
rdfs:label "função de controle de fluxo de processo"@pt-br .
### Process type
:COPI_0000416 rdf:type owl:Class ; # BinaryFlowControlProcess
rdfs:subClassOf :COPI_0000033 ; # ProcessControlledFlowProcess
rdfs:label "binary flow control process"@en ;
rdfs:label "processo de controle binário de fluxo"@pt-br ;
iof-av:naturalLanguageDefinition "A process-controlled flow process in which a flow path is completely opened or closed to allow or prevent fluid passage through petroleum production equipment."@en ;
skos:definition "A process-controlled flow process in which a flow path is completely opened or closed to allow or prevent fluid passage through petroleum production equipment."@en ;
iof-av:naturalLanguageDefinition "Um processo de escoamento controlado pelo processo em que uma passagem é totalmente aberta ou fechada para permitir ou impedir a passagem de fluido através de equipamentos de produção de petróleo."@pt-br .
:COPI_0000033 rdf:type owl:Class ; # ProcessControlledFlowProcess
rdfs:label "processo de controle de fluxo de processo"@pt-br .
:COPI_0000416 # BinaryFlowControlProcess
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_0000045 # ControlSignal
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: OnOffControlValve
:COPI_0000135 rdf:type owl:Class ; # OnOffControlValve
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000087 # ControlValve
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000162 # BinaryFlowControlFunction
]
)
] ;
rdfs:label "on off control valve"@en ;
rdfs:label "válvula de controle liga-desliga"@pt-br ;
iof-av:naturalLanguageDefinition "An on-off control valve is a control valve that bears a binary flow control function, having only two defined positions: fully open and fully closed."@en ;
skos:definition "An on-off control valve is a control valve that bears a binary flow control function, having only two defined positions: fully open and fully closed."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de controle liga-desliga é uma válvula de controle que possui uma função de controle de fluxo binária, tendo apenas duas posições definidas: totalmente aberta e totalmente fechada."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every on-off control valve is a control valve that has a BinaryFlowControlFunction and has component part a BinaryPositioner."@en ;
iof-av:firstOrderLogicAxiom "∀x(OnOffControlValve(x) ↔ ControlValve(x) ∧ ∃f(BinaryFlowControlFunction(f) ∧ bearerOf(x,f)))"@en ;
dcterms:source <https://standards.iso.org/iso/15926/-4/reference-data-item/ON-OFF_CONTROL_VALVE> .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
BinaryFlowControlFunction
⊑ ProcessControlledFlowFunction
Realized in
BinaryFlowControlProcess
⊑ ProcessControlledFlowProcess
The identity-giving function is the ability to provide binary (on/off) flow control in response to control signals, with only two defined positions. This is a specialization of ProcessControlledFlowFunction that restricts the control to discrete rather than continuous positioning.
✓
Expert review — Accepted
2
Genus Determination
ControlValve
From the parent candidates, 'control valve' is already enriched and is the most specific appropriate superclass. The concept is explicitly defined as 'a control valve' in the source definition. 'INSTRUMENTATION ITEM' is too broad and not equipment-specific.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
On-off control valves inherit standard valve parts (body, actuator) from the control valve genus. The key additional part is a binary positioning mechanism that restricts operation to only fully open or fully closed positions.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any process fluid
ControlSignal
— binary command signal
Outputs (O)
PortionOfFluid
— same fluid, flow either fully allowed or fully blocked
Transformation (T)
binary flow control - fluid flow is either completely enabled or completely blocked based on binary control input
The signature reflects the binary nature of the control - unlike continuously variable control valves, the output flow state has only two possible conditions corresponding to the two valve positions.
✓
Expert review — Accepted
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
✓
Expert review — Accepted
Cross-Standard Observations
Only one source (ISO 15926) defines this concept. The definition is clear and unambiguous, focusing on the binary positioning characteristic that distinguishes it from other control valve types.
Source Definitions
1 source
ISO 15926-4
ON-OFF CONTROL VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #240 |
| Cluster | on-off control valve |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-05-02 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/control_valve.svg
