exported
equivalent
blow down valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Blowdownvalve
Generated on 2026-04-16
Natural Language Definition
EN
A blow down valve is a valve that bears a designed function for rapid depressurization of high pressure systems.
PT-BR
Uma válvula de blow down é uma válvula que possui uma função projetada para despressurização rápida de sistemas de alta pressão.
Formal Axioms
Semi-formal (Aristotelian)
Every blow down valve is a valve that has the function of rapid depressurization.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (BlowDownValve(x) ↔ Valve(x) ∧ ∃f (RapidDepressurizationFunction(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: BlowDownValve
<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_0000166 rdf:type owl:Class ; # RapidDepressurizationFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000618 # RapidDepressurizationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000618 # RapidDepressurizationProcess
] ;
rdfs:label "rapid depressurization function"@en ;
rdfs:label "função de despressurização rápida"@pt-br .
### Process type
:COPI_0000618 rdf:type owl:Class ; # RapidDepressurizationProcess
rdfs:subClassOf :COPI_0000010 ; # FlowControl
rdfs:label "rapid depressurization process"@en ;
rdfs:label "processo de despressurização rápida"@pt-br .
:COPI_0000010 rdf:type owl:Class . # FlowControl
:COPI_0000618 # RapidDepressurizationProcess
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
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: BlowDownValve
:COPI_0000097 rdf:type owl:Class ; # BlowDownValve
owl:equivalentClass [
rdf:type owl:Class ;
owl:intersectionOf (
:COPI_0000077 # Valve
[
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000166 # RapidDepressurizationFunction
]
)
] ;
rdfs:label "blow down valve"@en ;
rdfs:label "válvula de blow down"@pt-br ;
iof-av:naturalLanguageDefinition "A blow down valve is a valve that bears a designed function for rapid depressurization of high pressure systems."@en ;
skos:definition "A blow down valve is a valve that bears a designed function for rapid depressurization of high pressure systems."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de blow down é uma válvula que possui uma função projetada para despressurização rápida de sistemas de alta pressão."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every blow down valve is a valve that has the function of rapid depressurization."@en ;
iof-av:firstOrderLogicAxiom "∀x (BlowDownValve(x) ↔ Valve(x) ∧ ∃f (RapidDepressurizationFunction(f) ∧ bearerOf(x,f)))"@en ;
skos:definition "[ISO 15926-4] A <BLOW DOWN VALVE is an <ARTEFACT> and a <VALVE> that can be used for rapid depressurizing of a high pressure system"@en ;
skos:definition "[CFIHOS] A valve that can be used for rapid depressurizing of a high pressure system."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
RapidDepressurizationFunction
⊑ DesignedFunction
Realized in
RapidDepressurizationProcess
⊑ FlowControl
The identity-giving function is the capability for rapid depressurization of high pressure systems. This is a specialized safety/operational function distinct from general flow control, as it specifically addresses emergency pressure release scenarios.
✓
Expert review — Accepted
2
Genus Determination
Valve
Both standards explicitly state this is a valve. 'Valve' is the most specific appropriate superclass and is already enriched in our ontology with FlowControlFunction. The parent_candidates include VALVE from iso15926, confirming this classification.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
Blow down valves inherit the essential valve parts from their genus. No additional parts are universally necessary at this level as implementation can vary (manual operation, actuated, etc.)
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— high pressure
Outputs (O)
PortionOfFluid
— rapidly reduced pressure
PortionOfFluid
— vented to atmosphere or lower pressure system
Transformation (T)
rapid pressure reduction through controlled fluid discharge
Takes high pressure fluid and rapidly reduces pressure by discharging fluid to atmosphere or lower pressure system. The key characteristic is the rapid nature of the depressurization.
✓
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
Both ISO 15926 and CFIHOS provide nearly identical definitions focused on the rapid depressurization function. ISO 15926 adds the explicit typing as both ARTEFACT and VALVE. The definitions are consistent and complementary.
Source Definitions
2 sources
ISO 15926-4
BLOW DOWN VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
blow down 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 | #156 |
| Cluster | blow down valve |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/valve.svg
