Swagelok SS-58S12 is a 316 stainless steel lift check valve designed for reliable reverse flow prevention in high-pressure industrial systems. This model features 3/4 inch Swagelok tube fitting connections on both ends and provides a flow coefficient (Cv) of 2.20. It is rated for service up to 5000 PSIG (344 BAR) at 100°F (37°C), making it suitable for demanding fluid control applications.

Design and Performance

Swagelok lift check valves utilize a unique bonnet design that leverages gravity to limit reverse flow. While the 58 series general design supports pressures up to 6000 psig (413 bar) and temperatures up to 900°F (482°C) depending on configuration, the SS-58S12 is optimized for standard high-pressure operations with a focus on ease of installation and leak-tight performance.

Technical Specifications

Specification	Detail
Body Material	316 Stainless Steel
Connection Type	Swagelok® Tube Fitting
Connection Size	3/4 in.
Cv (Maximum)	2.2
Pressure Rating	5000 PSIG @ 100°F (344 BAR @ 37°C)
Surface Finish	Standard
Cleaning	Standard Cleaning and Packaging (SC-10)

Classification Data

System	Code
eClass (10.1)	27292001
UNSPSC (15.1)	40141659
UNSPSC (13.0601)	40141634

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.

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