exported
necessary
wafer check valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Wafercheckvalve
Generated on 2026-04-16
Natural Language Definition
EN
A wafer check valve is a check valve that has a wafer pattern valve body designed for mounting between flanges.
PT-BR
Uma válvula de retenção wafer é uma válvula de retenção que possui um corpo de válvula padrão wafer projetado para montagem entre flanges.
Formal Axioms
Semi-formal (Aristotelian)
Every wafer check valve is a check valve that has a backflow prevention function and has a wafer check valve body as a component part.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (WaferCheckValve(x) → (CheckValve(x) ∧ ∃f(BackflowPreventionFunction(f) ∧ hasFunction(x,f)) ∧ ∃p(WaferCheckValveBody(p) ∧ hasComponentPartAtAllTimes(x,p))))
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: WaferCheckValve
<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
:COPI_0000161 rdf:type owl:Class ; # BackflowPreventionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000415 # BackflowPreventionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000415 # BackflowPreventionProcess
] ;
rdfs:label "backflow prevention function"@en ;
rdfs:label "função de prevenção de refluxo"@pt-br .
### Process type
:COPI_0000415 rdf:type owl:Class ; # BackflowPreventionProcess
rdfs:subClassOf :COPI_0000010 ; # FlowControl
rdfs:label "backflow prevention process"@en ;
rdfs:label "processo de prevenção de refluxo"@pt-br .
:COPI_0000010 rdf:type owl:Class . # FlowControl
:COPI_0000415 # BackflowPreventionProcess
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: WaferCheckValve
:COPI_0000160 rdf:type owl:Class ; # WaferCheckValve
rdfs:subClassOf :COPI_0000103 ; # CheckValve
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000161 # BackflowPreventionFunction
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasComponentPartAtAllTimes ;
owl:someValuesFrom :COPI_0000739 # WaferCheckValveBody
] ;
rdfs:label "wafer check valve"@en ;
rdfs:label "válvula de retenção wafer"@pt-br ;
iof-av:naturalLanguageDefinition "A wafer check valve is a check valve that has a wafer pattern valve body designed for mounting between flanges."@en ;
skos:definition "A wafer check valve is a check valve that has a wafer pattern valve body designed for mounting between flanges."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de retenção wafer é uma válvula de retenção que possui um corpo de válvula padrão wafer projetado para montagem entre flanges."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every wafer check valve is a check valve that has a backflow prevention function and has a wafer check valve body as a component part."@en ;
iof-av:firstOrderLogicAxiom "∀x (WaferCheckValve(x) → (CheckValve(x) ∧ ∃f(BackflowPreventionFunction(f) ∧ hasFunction(x,f)) ∧ ∃p(WaferCheckValveBody(p) ∧ hasComponentPartAtAllTimes(x,p))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Using necessary conditions because this is a constructive subtype (both functional and structural aspects). The wafer pattern mounting configuration is a structural differentia that, while characteristic, may have edge cases or specialized variants that should not be automatically classified without expert validation. The structural differentia should be confirmed as both necessary and sufficient in industrial practice before upgrading to equivalent mode."@en ;
skos:definition "[ISO 15926-4] A <WAFER CHECK VALVE> is a <WAFER PATTERN VALVE> and a <CHECK VALVE>"@en ;
skos:definition "[CFIHOS] A wafer pattern valve that is a check valve with a wafer pattern valve body."@en ;
skos:definition "[POSC Caesar] A wafer pattern valve that is a check valve with a wafer pattern valve body."@en .
:COPI_0000739 rdf:type owl:Class ; # WaferCheckValveBody
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "wafer check valve body"@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
BackflowPreventionFunction
⊑ DesignedFunction
Realized in
BackflowPreventionProcess
⊑ FlowControl
The identity-giving function is inherited from the check valve parent class. A wafer check valve is fundamentally a check valve (prevents reverse flow) that happens to have a wafer mounting pattern. The BackflowPreventionFunction is already established in the enriched check valve class and should be reused.
✓
Expert review — Accepted
2
Genus Determination
CheckValve
From the parent_candidates, 'check valve' is already enriched in our ontology and is the most specific appropriate superclass. The wafer check valve is clearly a specialization of check valve with additional structural constraints. The definition explicitly states it is both a wafer pattern valve AND a check valve, making check valve the functional genus.
✓
Expert review — Accepted
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| WaferCheckValveBody | MaterialArtifact | hasComponentPartAtAllTimes |
The wafer pattern valve body is the defining structural component that distinguishes this from other check valve types. The closure member is inherited from the check valve genus but may vary (disc, ball, etc.) depending on the specific wafer check valve design.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— forward flow direction
Outputs (O)
PortionOfFluid
— same fluid, reverse flow blocked
Transformation (T)
directional flow control - permits forward flow, blocks reverse flow
Inherits the process signature from check valve - single inlet/outlet with automatic closure on flow reversal. The wafer mounting pattern does not change the fundamental flow control function.
✓
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.
Using necessary conditions because this is a constructive subtype (both functional and structural aspects). The wafer pattern mounting configuration is a structural differentia that, while characteristic, may have edge cases or specialized variants that should not be automatically classified without expert validation. The structural differentia should be confirmed as both necessary and sufficient in industrial practice before upgrading to equivalent mode.
✓
Expert review — Accepted
Cross-Standard Observations
All three sources (ISO 15926, CFIHOS, POSC Caesar) provide consistent definitions, emphasizing both the check valve function and the wafer pattern valve body. The definitions are remarkably aligned across standards, indicating strong consensus on this equipment categorization.
Source Definitions
3 sources
ISO 15926-4
WAFER CHECK VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
wafer check valve
Definition text withheld (copyrighted standard) — follow the source link above.
POSC Caesar
Wafer Check 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 | #158 |
| Cluster | wafer check valve |
| Status | exported |
| Axiom mode | necessary |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/check_valve.svg
