valve
Let an agent explain valves and their kinds, relay design, standards and selection from engineering references, describe specialised valves such as regulators and tyre valves, and distinguish mechanical valves from heart valves, electronic vacuum tubes and other senses.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain valves and their kinds, relay design, standards and selection from engineering references, describe specialised valves such as regulators and tyre valves, and distinguish mechanical valves from heart valves, electronic vacuum tubes and other senses.
A device that controls the flow of fluids by opening, closing or partially obstructing a passage, in forms such as gate, globe, ball, butterfly, check and needle valves, pressure regulators for gas and water, safety and pressure-limiting valves such as those on fire hose lines, the Schrader valve of tyres, and historical sluice gates such as the martelieres of southern France; valves have a body, a closure element and often a stem, and are essential in plumbing, industry, engines and medicine.
What it is for: Controlling fluid flow.
It can be explain kinds and design; relay standards and selection; describe specialised valves; distinguish other senses.
Distinguishing features
Flow control
Many mechanisms
Standardised
Ubiquitous
What it looks like
A fitting in a pipe with a handle, wheel or actuator.
Physical character
common standards: API, ASME, ISO, EN list
Schrader valve patented: 1893 year
main parts: body, bonnet, stem, disc or ball, seat, actuator list
How it is recognised
Flow control device in a passage
Gate, globe, ball, butterfly, check, needle valves, pressure regulators, hose line limiting valves, Schrader valve, valve stem, martelieres
Heart valves are biological; vacuum tubes are called valves in British English
Related models
is a kind of - component in registry terms
is a kind of - in registry terms
is a kind of - in registry terms
is contrasted with - a biological structure
In practice
Families and kinds
isolation valves such as gate, ball and butterfly valves
control and throttling valves such as globe and needle valves
check valves
safety, relief and pressure-limiting valves
pressure regulators for gas and water
tyre and small valves such as the Schrader valve
historical sluice valves such as martelieres
Standards and regulation
ASME B16 and API valve standards
Pressure Equipment Directive in the EU
Gas appliance regulations for regulators
Failure modes and hazards
Leakage and failure to seal
Overpressure when safety valves fail
Registry aliases mixing parts, regulators and historical gates
Also called
+43
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.valve-artifact
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a valve is.
Definition.
Definition
Definition and parts.
Definition
Definition.
- What is a valve, what are its parts, and how does it differ from heart valves and vacuum tubes? definition
- Is the question about mechanical valves, a kind, a regulator or another sense? boundary
Kinds
Kinds.
Kinds
Kinds.
- What are gate, globe, ball, butterfly, check and needle valves, pressure regulators, hose line limiting valves, the Schrader valve and martelieres? definition
- Which entry fits the specific kind? action
Engineering Engineering.
Regulation.
Selection
Selection and sizing.
Selection
Selection.
- How are valves selected and sized for pressure, flow, fluid and temperature? action
- Which references are standard? provenance
Standards
Standards.
Standards
Standards.
- What standards govern valve design, testing and safety? provenance
- Which sources are cited? provenance
Use Applications.
Application.
Plumbing
Plumbing and gas.
Plumbing
Plumbing.
- How are valves and regulators used in water and gas supply? provenance
- Which entry fits plumbing? action
Industry
Industry and vehicles.
Industry
Industry.
- How are valves used in process industry, engines and tyres? provenance
- Which entry fits the specific application? action
Context History and maintenance.
Context.
History
History.
History
History.
- How did valves develop from Roman taps and sluices such as martelieres to modern designs? provenance
- Which entry fits the history of hydraulics? action
Maintenance
Maintenance.
Maintenance
Maintenance.
- How are valves inspected, maintained and replaced? action
- Which entry fits valve maintenance? action
What the second pass must settle
- Should pressure regulator and Schrader valve be separate primary entries?
- How should engineering sources be linked?
- The registry entry has merged aliases naming parts, regulators and French sluices; should they be split off?