exported
necessary
diaphragm valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Diaphragmvalve
Generated on 2026-04-16
Natural Language Definition
EN
A diaphragm valve is a valve that uses a resilient diaphragm forced against a port as its closure mechanism to control fluid flow.
PT-BR
Uma válvula de diafragma é uma válvula que usa um diafragma resiliente forçado contra uma porta como seu mecanismo de fechamento para controlar o fluxo de fluido.
Formal Axioms
Semi-formal (Aristotelian)
Every diaphragm valve is a valve that has a resilient diaphragm as component part and has a port as component part and participates in diaphragm closure processes.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (DiaphragmValve(x) → Valve(x) ∧ ∃d,p (ResilientDiaphragm(d) ∧ Port(p) ∧ hasComponentPartAtAllTimes(x,d) ∧ 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: DiaphragmValve
<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: DiaphragmValve
:COPI_0000108 rdf:type owl:Class ; # DiaphragmValve
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_0000329 # Port
] ;
rdfs:label "diaphragm valve"@en ;
rdfs:label "válvula de diafragma"@pt-br ;
iof-av:naturalLanguageDefinition "A diaphragm valve is a valve that uses a resilient diaphragm forced against a port as its closure mechanism to control fluid flow."@en ;
skos:definition "A diaphragm valve is a valve that uses a resilient diaphragm forced against a port as its closure mechanism to control fluid flow."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de diafragma é uma válvula que usa um diafragma resiliente forçado contra uma porta como seu mecanismo de fechamento para controlar o fluxo de fluido."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every diaphragm valve is a valve that has a resilient diaphragm as component part and has a port as component part and participates in diaphragm closure processes."@en ;
iof-av:firstOrderLogicAxiom "∀x (DiaphragmValve(x) → Valve(x) ∧ ∃d,p (ResilientDiaphragm(d) ∧ Port(p) ∧ hasComponentPartAtAllTimes(x,d) ∧ hasComponentPartAtAllTimes(x,p)))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Since this is a constructive type defined by physical mechanism (diaphragm closure), necessary conditions are used to avoid over-classification under the Open World Assumption. Not every equipment with a diaphragm component should automatically be classified as a diaphragm valve - the structural differentia requires domain validation."@en ;
skos:definition "[ISO 15926-4] A <DIAPHRAGM VALVE> is a <MEMBRANE VALVE> where the closure member is a resilient diaphragm being forced against a port"@en ;
skos:definition "[CFIHOS] A membrane valve that is a membrane valve where the closure member is a resilient diaphragm being forced against a port."@en .
:COPI_0000329 rdf:type owl:Class ; # Port
rdfs:subClassOf iof-core:MaterialArtifact ;
rdfs:label "MaterialArtifact que possui uma InterfacingFunction e"@pt-br ;
rdfs:label "port"@en .
# Disjointness: DiaphragmValve and BallValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000108 :COPI_0000095 ) . # DiaphragmValve, BallValve
# Disjointness: DiaphragmValve and GateValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000108 :COPI_0000120 ) . # DiaphragmValve, GateValve
# Disjointness: DiaphragmValve and ButterflyValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000108 :COPI_0000100 ) . # DiaphragmValve, ButterflyValve
# Disjointness: DiaphragmValve and GlobeValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000108 :COPI_0000123 ) . # DiaphragmValve, GlobeValve
# Disjointness: DiaphragmValve and PlugValve
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000108 :COPI_0000140 ) . # DiaphragmValve, PlugValve
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowControlFunction
⊑ DesignedFunction
Realized in
FlowControlProcess
⊑ FlowControl
As a valve type, diaphragm valves inherit the generic flow control function - they are designed to control fluid flow through a conduit. This function is shared with all valve types and is already established in the enriched valve class.
✓
Expert review — Accepted
2
Genus Determination
Valve
Both source definitions clearly identify diaphragm valve as a type of valve (ISO 15926 states it's a MEMBRANE VALVE, which is itself a valve type). The parent_candidates list includes 'manual valve' which is already enriched, but 'Valve' is the more appropriate direct genus as it's the broader valve category. Valve is already enriched in our ontology with FlowControlFunction.
✓
Expert review — Accepted
3
Necessary Parts
| Part class | Parent | Relation |
|---|---|---|
| Port | MaterialArtifact | hasComponentPartAtAllTimes |
These parts constitute the essential mechanism that defines a diaphragm valve: the diaphragm itself, the port it seals against, and the actuating mechanism that forces them together.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any phase
Outputs (O)
PortionOfFluid
— flow rate controlled by diaphragm position
Transformation (T)
flow rate modification through variable restriction
Like other valves, diaphragm valves have a single inlet and outlet with the same fluid, but the flow rate is controlled by the position of the diaphragm against the port, creating variable restriction.
✓
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.
Since this is a constructive type defined by physical mechanism (diaphragm closure), necessary conditions are used to avoid over-classification under the Open World Assumption. Not every equipment with a diaphragm component should automatically be classified as a diaphragm valve - the structural differentia requires domain validation.
✓
Expert review — Accepted
Disjointness Axioms
BallValve
GateValve
ButterflyValve
GlobeValve
PlugValve
C1: BallValve, GateValve, ButterflyValve, GlobeValve, PlugValve. Disjoint with other valve types that use incompatible closure mechanisms - a valve cannot simultaneously use a diaphragm closure and a ball, gate, butterfly, globe, or plug closure mechanism.
Cross-Standard Observations
Both ISO 15926 and CFIHOS provide essentially identical definitions, with ISO 15926 noting it's a type of MEMBRANE VALVE. The definitions are consistent in emphasizing the resilient diaphragm forced against a port as the key distinguishing mechanism.
Source Definitions
2 sources
ISO 15926-4
DIAPHRAGM VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
diaphragm 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 | #163 |
| Cluster | diaphragm valve |
| Status | exported |
| Axiom mode | necessary |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/diaphragm_valve.svg
