Selection Wizard
Valve Function
What the valve must do. Function is the first filter on candidate valve types per API 615.
Inputs
Fill in what you know — defaults assumed where left blank.
The main job of this valve in the line.
Pick the dominant duty
A valve can have more than one role, but design for the dominant function. Combined isolation + throttling almost always degrades shut-off — split into two valves.
API 615
§6 — selection by valve function and service.
Step 3 of 5Valve Function
Valve Function
What the valve must do. Function is the first filter on candidate valve types per API 615.
Pick the dominant duty
A valve can have more than one role, but design for the dominant function. Combined isolation + throttling almost always degrades shut-off — split into two valves.
API 615
§6 — selection by valve function and service.
Engineering Decision Support Tool - Screening / Internal Review Use unless independently validated.
Outputs are generated for engineering screening and decision support only. Final responsibility for standards compliance, engineering judgment, specification verification, and approved project use remains with the user organization and qualified reviewing engineer.