The Swagelok B-8C-1/3 brass poppet check valve provides fixed pressure control for back flow in general-service and high-purity applications. This model features a 1/3 psi (0.03 bar) cracking pressure, 1/2 in. Swagelok® Tube Fitting end connections, and a Buna N O-ring, offering a maximum flow coefficient (Cv) of 1.68.

Specifications

Specification	Value
Body Material	Brass
Cleaning Process	Standard Cleaning and Packaging (SC-10)
Connection 1 Size	1/2 in.
Connection 1 Type	Swagelok® Tube Fitting
Connection 2 Size	1/2 in.
Connection 2 Type	Swagelok® Tube Fitting
Cracking Pressure	1/3 psi (0.03 bar, 0.003 MPa)
CV Maximum	1.68
O-Ring Material	Buna N
Room Temperature Pressure Rating	2100 PSIG @ 100°F / 144 BAR @ 37°C
Surface Finish	Standard
Testing	No Optional Testing

Safety Warning

The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.

Component Interchangeability

Do not mix/interchange Swagelok products or components not governed by industrial design standards, including Swagelok tube fitting end connections, with those of other manufacturers.