Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
self-operating valve
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: structure-based → ⊑
The identity is given by the physical configuration - the valve includes built-in means of operation (spring, gravity, fluid pressure, counter balance) and explicitly does not depend on external energy sources. This is a structural/mechanical differentia that distinguishes it from externally-actuated valves, regardless of the specific flow control function it performs.
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
FlowControlFunction → FlowControlProcess ⊑ FlowControl
▼
COPI-Core operation
FlowControl via process parent FlowControl
LLM rationale:
As a valve, it inherits the generic flow control function. The self-operating mechanism is not a distinct function but a means of realizing the same flow control function without external energy.
▸
Expert review
— accepted
2
Genus Proximus
✓ done
Valve · 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:
Both sources explicitly classify this as a VALVE. The parent_candidates list shows 'VALVE' as already enriched in our ontology. This is the most specific appropriate superclass - self-operating valve is a specialized type of valve.
▸
Expert review
— accepted
3
Differentia Specifica
✓ done
∃hasComponentPartAtAllTimes.SelfOperatingMechanism ⊓ ∃bearerOf.EnergyIndependentOperationCapability
▼
Conditions that distinguish
Self-Operating Valve
from sibling classes under genus
Valve.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The defining characteristic is the built-in operating mechanism that functions without external energy. This differentiates it from all other valve types that require external actuators or energy sources.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
Every self-operating valve must have the self-operating mechanism as its defining component, plus the basic valve components inherited from the genus.
▸
Expert review
— accepted
5
Process Participation Signature ⟨I, O, T⟩
✓ done
PortionOfFluid → PortionOfFluid
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Same basic fluid control signature as other valves, but the transformation is achieved through internal mechanisms rather than external actuation.
▸
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).
Label aggregation (source terms merged into this cluster)
Merged automatically (hyphen/space variants):
-
self operating valve— cfihos
Properties as BFO qualities
0 of 14 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Self-Operating Valve as
bfo:Quality subclasses.
Each selected property →
:Self-OperatingValveQuality ⊑ bfo:Quality, inheres in :Self-OperatingValve
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Self-Operating 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 (2)
SELF-OPERATING VALVE — ClassOfFunctionalObject
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
cfihos V2.0
self operating valve — TagAndEquipmentClass
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Provenance tiers (2)
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 are all the subclasses of Valve recognised in COPI?
- answered What distinguishes a self-operating valve from an actuated control valve?
- open What is a valve body?
- open Which COPI equipment classes require a valve body as a necessary component? (candidates: blow down valve, butterfly control valve, double block and bleed valve, safety relief valve, self-operating valve and 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 62 · claude-sonnet-4-20250514
Created 2026-04-13 23:41
Updated 2026-09-08 12:26
