Swagelok SS-XSS4 is a 316 stainless steel excess flow valve designed to protect systems by stopping the uncontrolled release of media in the event of a downstream line rupture. This valve features 1/4 in. Swagelok tube fitting connections on both ends and is rated for a maximum flow coefficient (Cv) of 0.5. It is manufactured following the Swagelok Standard Cleaning and Packaging (SC-10) protocol.

Technical Specifications

Feature	Specification
Body Material	316 Stainless Steel
Connection Size	1/4 in.
Connection Type	Swagelok® Tube Fitting
Cv Maximum	0.5
Spring Trip Range	3.9 to 5.8 U.S. gal/min (14.7 to 21.9 L/min)
Cleaning	SC-10 Standard

Working Principle

The SS-XSS4 utilizes a fixed-pressure spring-loaded slotted poppet to monitor flow rates. When downstream flow exceeds the specified trip range (such as during a line rupture), the poppet moves to the tripped position to shut off the flow. The valve automatically resets once the system pressure equalizes.

System Safety

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.

Industrial Classifications

• eClass (10.1): 22560307
• UNSPSC (15.1): 40141600
• UNSPSC (17.1001): 40183101