Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
wafer check valve
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: both
This concept combines a functional parent (check valve - backflow prevention function) with a constructive differentia (wafer pattern valve body - specific mounting configuration designed to fit between flanges). The wafer pattern is a structural mounting design that is orthogonal to the backflow prevention function.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
— accepted
Axiomatization steps
1
Identity-Giving Function
✓ done
BackflowPreventionFunction → BackflowPreventionProcess ⊑ FlowControl
▼
COPI-Core operation
FlowControl via process parent FlowControl
LLM rationale:
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 Proximus
✓ done
CheckValve · MaterialArtifact
▼
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:
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
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.WaferPatternValveBody
▼
Conditions that distinguish
Wafer Check Valve
from sibling classes under genus
CheckValve.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia is purely structural - the wafer pattern valve body. This is a specific body design that allows the valve to be sandwiched between pipe flanges without requiring its own flanged connections. This structural differentia is what distinguishes wafer check valves from other check valve types while inheriting the functional identity from the check valve genus.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
WaferCheckValveBody
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
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
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
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
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
0 of 15 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Wafer Check Valve as
bfo:Quality subclasses.
Each selected property →
:WaferCheckValveQuality ⊑ bfo:Quality, inheres in :WaferCheckValve
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Wafer Check Valve.
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 (3)
WAFER CHECK VALVE — ClassOfInanimatePhysicalObject
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
cfihos V2.0
wafer check valve — TagAndEquipmentClass
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Wafer Check Valve — Class
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Provenance tiers (3)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- answered What is the identity-giving function of a check valve?
- 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)
- open What is a closure member?
- open Is closure member the correct genus for wafer check valve in the COPI ontology?
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 158 · claude-sonnet-4-20250514
Created 2026-04-16 18:11
Updated 2026-09-08 17:39
