Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
check valve closure member
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
The concept is defined by its physical role as a closure member within a check valve structure, not by an independent function. The identity is given by the structural relationship (being a closure member part) and the specific mechanism (preventing backflow through physical positioning/movement). This is a constructive part of a larger functional assembly (check valve).
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
Axiomatization steps
1
Identity-Giving Function
✓ done
BackflowPreventionFunction → BackflowPreventionProcess ⊑ FlowControl
▼
COPI-Core operation
FlowControl via process parent FlowControl
LLM rationale:
The closure member inherits the check valve's identity-giving function of preventing backflow. While it is a constructive part, it participates in realizing this function through its physical mechanism.
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Expert review
2
Genus Proximus
✓ done
MaterialArtifact
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Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
The concept is defined as both ARTEFACT and VALVE CLOSURE MEMBER in the source. Since VALVE CLOSURE MEMBER is not in the already-enriched classes and represents a specialized component category, we use MaterialArtifact as the most specific available genus. This is a designed artifact that functions as a mechanical component within a larger assembly.
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Expert review
3
Differentia Specifica
✓ done
∃isComponentPartOf.CheckValve ⊓ ∃bearerOf.BackflowPreventionFunction
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Conditions that distinguish
Check Valve Closure Member
from sibling classes under genus
MaterialArtifact.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia specifies both the structural relationship (being part of a check valve) and the functional specialization (backflow prevention), which together distinguish this from other valve closure members that serve different flow control purposes.
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Expert review
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
No component terms are provided in the source standards, and the source definition does not specify internal parts of the closure member itself. This is a component-level concept where further decomposition into subparts would require additional domain expertise and source evidence.
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Expert review
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
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Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
The closure member responds to fluid pressure differentials by positioning itself to either block reverse flow or allow forward flow, which is the characteristic signature of flow direction control mechanisms.
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Expert review
More
Alternative labels
none
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Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
no CFIHOS/DEXPI properties
▼
No CFIHOS/DEXPI properties found for this cluster.
Custom axioms
none
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Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Check Valve Closure Member.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (1)
CHECK VALVE CLOSURE MEMBER — ClassOfInanimatePhysicalObject
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Provenance tiers (1)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- open What is a check valve closure member?
- open Which COPI equipment classes require a check valve closure member as a necessary component? (candidates: check valve and wafer check valve)
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 387 · claude-sonnet-4-20250514
Created 2026-05-04 18:27
Updated 2026-09-08 12:26
