exported
necessary
double block and bleed valve
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Doubleblockandbleedvalve
Generated on 2026-04-16
Natural Language Definition
EN
A double block and bleed valve is a valve that incorporates two seats each providing sealing capability and includes a means of venting the space between the seats.
PT-BR
Uma válvula de bloqueio duplo e sangria é uma válvula que incorpora duas sedes, cada uma proporcionando capacidade de vedação, e inclui um meio de ventilação do espaço entre as sedes.
Formal Axioms
Semi-formal (Aristotelian)
Every double block and bleed valve is a valve that has a primary seat and has a secondary seat and has a bleed port.
First-Order Logic Theory
Loading…
▸ Stored override
∀x (DoubleBlockAndBleedValve(x) → (Valve(x) ∧ ∃p,s,b (PrimarySeat(p) ∧ SecondarySeat(s) ∧ BleedPort(b) ∧ hasComponentPartAtAllTimes(x,p) ∧ hasComponentPartAtAllTimes(x,s) ∧ hasComponentPartAtAllTimes(x,b))))
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: DoubleBlockAndBleedValve
<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
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000037 # PortionOfFluid
] .
### Equipment universal: DoubleBlockAndBleedValve
:COPI_0000111 rdf:type owl:Class ; # DoubleBlockAndBleedValve
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:label "double block and bleed valve"@en ;
rdfs:label "válvula de bloqueio duplo e sangria"@pt-br ;
iof-av:naturalLanguageDefinition "A double block and bleed valve is a valve that incorporates two seats each providing sealing capability and includes a means of venting the space between the seats."@en ;
skos:definition "A double block and bleed valve is a valve that incorporates two seats each providing sealing capability and includes a means of venting the space between the seats."@en ;
iof-av:naturalLanguageDefinition "Uma válvula de bloqueio duplo e sangria é uma válvula que incorpora duas sedes, cada uma proporcionando capacidade de vedação, e inclui um meio de ventilação do espaço entre as sedes."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every double block and bleed valve is a valve that has a primary seat and has a secondary seat and has a bleed port."@en ;
iof-av:firstOrderLogicAxiom "∀x (DoubleBlockAndBleedValve(x) → (Valve(x) ∧ ∃p,s,b (PrimarySeat(p) ∧ SecondarySeat(s) ∧ BleedPort(b) ∧ hasComponentPartAtAllTimes(x,p) ∧ hasComponentPartAtAllTimes(x,s) ∧ hasComponentPartAtAllTimes(x,b))))"@en ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive basis - the structural differentia (dual seats plus bleed port) defines necessary conditions, but under OWA we cannot assert that ANY artifact with these structural components is definitively a double block and bleed valve, as specialized multi-way valves or custom manifolds might contain similar mechanisms without being standard maintenance categories."@en ;
skos:definition "[ISO 15926-4] A <DOUBLE BLOCK AND BLEED VALVE> is a <BLOCK AND BLEED VALVE> and a <DOUBLE BLOCK VALVE> that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design"@en ;
skos:definition "[CFIHOS] A block and bleed valve that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design."@en .
Axiomatization Decision Log
1
Identity-Giving Function
Function class
FlowControlFunction
⊑ DesignedFunction
Realized in
FlowControlProcess
⊑ FlowControl
As a valve subtype, the identity-giving function is FlowControlFunction - the ability to regulate fluid flow. This is the generic function inherited from the valve genus, not a specialized function unique to double block and bleed valves.
✓
Expert review — Accepted
2
Genus Determination
Valve
The concept is explicitly defined as inheriting from both BLOCK AND BLEED VALVE and DOUBLE BLOCK VALVE in ISO 15926, and manual valve is listed as a parent in CFIHOS. However, the most fundamental genus is Valve, which is already enriched in our ontology with function: FlowControlFunction and genus: MaterialArtifact.
✓
Expert review — Accepted
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
The dual seating system plus bleed port are the essential structural components that define this valve type. The valve body houses this specific arrangement.
✓
Expert review — Accepted
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
PortionOfFluid
— any phase, any composition
Outputs (O)
PortionOfFluid
— controlled flow rate, same phase and composition as input
PortionOfFluid
— bleed fluid from intermediate cavity - optional, for venting/testing
Transformation (T)
flow control with dual isolation capability and intermediate cavity monitoring/venting
Primary signature is standard valve flow control, but with additional bleed output capability that allows venting or sampling from the space between seats for testing seal integrity.
✓
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 basis - the structural differentia (dual seats plus bleed port) defines necessary conditions, but under OWA we cannot assert that ANY artifact with these structural components is definitively a double block and bleed valve, as specialized multi-way valves or custom manifolds might contain similar mechanisms without being standard maintenance categories.
✓
Expert review — Accepted
Cross-Standard Observations
Both ISO 15926 and CFIHOS provide consistent definitions focusing on the dual seating arrangement with intermediate bleed capability. ISO 15926 additionally notes that this inherits from both DOUBLE BLOCK VALVE and BLOCK AND BLEED VALVE concepts. The pressure differential direction variability (same or opposite) mentioned in both sources indicates design flexibility rather than functional differentiation.
Source Definitions
2 sources
ISO 15926-4
DOUBLE BLOCK AND BLEED VALVE ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
double block and bleed 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 | #161 |
| Cluster | double block and bleed valve |
| Status | exported |
| Axiom mode | necessary |
| Created | 2026-04-16 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
wikimedia/valve.svg
