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Festo QBY1 Series

17 variants · Festo

About the Festo QBY1 Series

The Festo QBY1 Series series groups 17 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common material of Polybutylene Terephthalate (PBT), operating pressure of -14 to 145 PSI (-1 to 10 bar) and package of Bulk. Variants differ by connection method, mounting and product type, so you can match the exact connection method your application requires using the selection guide below. All listed Festo QBY1 Series part numbers are active and orderable.

Select a variant by

Connection method
Push-In · Push-In to Threaded
Mounting
Chassis Mount · Free Hanging (In-Line)
Product type
Y-Adapter · Y-Fitting
Connector size
NPT1/2-14 · NPT1/4-18 · NPT1/8-27

Shared specifications

Material
Polybutylene Terephthalate (PBT)
Operating pressure
-14 to 145 PSI (-1 to 10 bar)
Package
Bulk
Temp operating max
60 °C
Temp operating min
0 °C

Variant comparison

ParameterQBY-1/2-1/2-UQBY-1/2-3/8-UQBY-1/4-1/2-UQBY-1/4-3/8-UQBY-1/2T-5/16-UQBY-1/4-5/16-U
Connection methodPush-In to ThreadedPush-In to ThreadedPush-In to ThreadedPush-In to ThreadedPush-InPush-In to Threaded
MountingFree Hanging (In-Line)Free Hanging (In-Line)Free Hanging (In-Line)Free Hanging (In-Line)Chassis MountFree Hanging (In-Line)
Product typeY-FittingY-FittingY-FittingY-FittingY-AdapterY-Fitting
Connector sizeNPT1/2-14NPT1/2-14NPT1/4-18NPT1/4-18NPT1/4-18

Request a quote on any Festo QBY1 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

All variants