exported
necessary
plug valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Plugvalve
Generated on 2026-04-13
Natural Language Definition
EN
A plug valve is a valve that has a cylindrical or tapered plug closure member which operates by quarter-turn rotation on its axis to control fluid flow by sealing against a seat.
PT-BR
Uma válvula plug é uma válvula que possui um elemento de fechamento em forma de plugue cilíndrico ou cônico que opera por rotação de um quarto de volta em seu eixo para controlar o fluxo de fluido selando contra um assento.
Formal Axioms
Semi-formal (Aristotelian)
Every plug valve is a valve that has a plug closure component and participates in quarter-turn rotation processes
First-Order Logic Theory
Loading…
▸ Stored override
∀x(PlugValve(x) → Valve(x) ∧ ∃p(PlugClosure(p) ∧ hasComponentPartAtAllTimes(x,p)) ∧ ∃r(QuarterTurnRotationProcess(r) ∧ participatesIn(x,r)))
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: PlugValve
<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_0000026 rdf:type owl:Class ; # FlowControlFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000520 # FlowControlProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000520 # FlowControlProcess
] ;
rdfs:label "flow control function"@en ;
rdfs:label "função de controle de fluxo"@pt-br .
### Process type
:COPI_0000520 rdf:type owl:Class ; # FlowControlProcess
rdfs:subClassOf :COPI_0000010 ; # FlowControl
rdfs:label "flow control process"@en ;
rdfs:label "processo de controle de fluxo"@pt-br .
:COPI_0000010 rdf:type owl:Class . # FlowControl
:COPI_0000520 # FlowControlProcess
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:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: PlugValve
:COPI_0000140 rdf:type owl:Class ; # PlugValve
rdfs:subClassOf :COPI_0000077 ; # Valve
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000026 # FlowControlFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000371 # ValveSeat
] ;
rdfs:label "plug valve"@en ;
rdfs:label "válvula plug"@pt-br ;
iof-av:naturalLanguageDefinition "A plug valve is a valve that has a cylindrical or tapered plug closure member which operates by quarter-turn rotation on its axis to control fluid flow by sealing against a seat."@en ;
skos:definition "A plug valve is a valve that has a cylindrical or tapered plug closure member which operates by quarter-turn rotation on its axis to control fluid flow by sealing against a seat."@en ;
iof-av:naturalLanguageDefinition "Uma válvula plug é uma válvula que possui um elemento de fechamento em forma de plugue cilíndrico ou cônico que opera por rotação de um quarto de volta em seu eixo para controlar o fluxo de fluido selando contra um assento."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every plug valve is a valve that has a plug closure component and participates in quarter-turn rotation processes"@en ;
iof-av:firstOrderLogicAxiom "∀x(PlugValve(x) → Valve(x) ∧ ∃p(PlugClosure(p) ∧ hasComponentPartAtAllTimes(x,p)) ∧ ∃r(QuarterTurnRotationProcess(r) ∧ participatesIn(x,r)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive classification requires necessary conditions only. Under OWA, any artifact with a plug closure and quarter-turn mechanism would be forcibly classified as a plug valve, but specialized multi-port valves or custom manifolds containing plug mechanisms should not automatically inherit the standard plug valve classification without domain expert validation."@en ;
skos:definition "[ISO 15926-4] A <PLUG VALVE> is a <ROTARY VALVE> that has a quarter turn action in which the closure member is a cylindrical or tapered plug which operates by rotating on its axis and sealing against a downstream seat"@en ;
skos:definition "[CFIHOS] A rotary valve that has a quarter turn action in which the closure member is a cylindrical or tapered plug which operates by rotating on its axis and sealing against a downstream seat."@en ;
skos:definition "[SLB Glossary] A quarter-turn valve whose closure element is usually a tapered plug having a rectangular port."@en ;
skos:definition "[OnePetro] A high pressure valve with a rotatable plug that allows or denies flow."@en ;
skos:definition "[POSC Caesar] A rotary valve that has a quarter turn action in which the closure member is a cylindrical or tapered plug which operates by rotating on its axis and sealing against a downstream seat."@en .
:COPI_0000371 rdf:type owl:Class ; # ValveSeat
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "assento de válvula"@pt-br ;
rdfs:label "valve seat"@en .
# Disjointness: PlugValve and BallValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000140 :COPI_0000095 ) . # PlugValve, BallValve
# Disjointness: PlugValve and GateValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000140 :COPI_0000120 ) . # PlugValve, GateValve
# Disjointness: PlugValve and ButterflyValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000140 :COPI_0000100 ) . # PlugValve, ButterflyValve
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowControlFunction
⊑ DesignedFunction
Realized in
FlowControlProcess
⊑ FlowControl
Plug valves share the same identity-giving function as other valves - controlling fluid flow. This function is already established in our ontology for the Valve class. The plug valve's identity comes from HOW it realizes this function (via rotating plug mechanism), not from a unique function type.
✓
Expert review — Accepted
2
Genus Determination
Valve
All sources clearly identify plug valve as a subtype of valve. 'Valve' is the most specific appropriate superclass and is already enriched in our ontology. The parent candidates include 'ROTARY VALVE' but this is a more specific structural category that should itself be a subtype of Valve. The BFO root is MaterialArtifact since valves are causally unified artifacts designed for fluid control.
✓
Expert review — Accepted
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| ValveSeat | MaterialArtifact | hasComponentPartAtAllTimes |
These parts represent the minimum physical components necessary for any plug valve to function according to its defining mechanism across all sources.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any fluid phase
Outputs (O)
PortionOfFluid
— same fluid, potentially blocked or throttled
Transformation (T)
mechanical flow control - no change to fluid properties, only flow rate/direction
Plug valves have the standard valve signature: single fluid input/output with mechanical flow control transformation. The plug mechanism affects flow control but not the fundamental process signature.
✓
Expert review — Accepted
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.
Constructive classification requires necessary conditions only. Under OWA, any artifact with a plug closure and quarter-turn mechanism would be forcibly classified as a plug valve, but specialized multi-port valves or custom manifolds containing plug mechanisms should not automatically inherit the standard plug valve classification without domain expert validation.
✓
Expert review — Accepted
Disjointness Axioms
BallValve
GateValve
ButterflyValve
C1: BallValve, GateValve, ButterflyValve. Grounded in incompatible closure mechanisms: plug closure vs. ball closure vs. sliding gate vs. rotating disc. These represent mutually exclusive structural designs.
Cross-Standard Observations
Strong consistency across sources on the key structural characteristics (plug closure, quarter-turn rotation, sealing against seat). SLB emphasizes tapered plug with rectangular port, while others include both cylindrical and tapered options. OnePetro's definition is less detailed but consistent. No significant conflicts noted.