Swagelok® Excess Flow Valves—XS Series
Swagelok excess flow valves stop uncontrolled release of system
media if a downstream line ruptures. Flow through the bleed vent is less
than 1 % of the flow rate in the trip range.
Up to 6000 psig (413 bar)
–10 to 400°F (–23 to 204°C)
316 stainless steel
Swagelok tube fitting, NPT, ISO, SAE/MS, VCR® metal gasket face seal,
and VCO® O-ring face seal fittings
1/8, 1/4, 3/8, 1/2 in. and 6, 8, 10, 12 mm
The spring-loaded poppet remains in the open position during
normal system operation. Should an excess flow condition occur
downstream, the poppet rapidly moves to the tripped position, stopping
uncontrolled release of system media. When the system pressure equalizes
through the bleed vent, the spring automatically resets the poppet to
the open position.
- Slotted poppet
- improves performance and reliability
- provides high-flow capacity
- eliminates nuisance tripping.
- Spring-loaded actuation
- eases operation
- allows valve to work in any orientation, enhancing system
- Bleed vent
- eliminates complex bypass mechanisms
- allows spring to reset poppet automatically.
- All metal seat
- improves durability
- requires no maintenance
Every XS series valve is factory tested for proper operation.
Cleaning and Packaging
Swagelok XS series excess flow valves with VCR or VCO end
connections are processed in accordance with Swagelok Special Cleaning
and Packaging (SC-11), to ensure compliance with product cleanliness
requirements stated in ASTM G93 Level C. Swagelok XS series excess flow
valves with other end connections are processed in accordance with
Swagelok Standard Cleaning and Packaging (SC-10); special cleaning and
packaging are available as an option.
- Optional O-ring material
- PEEK backup ring
- Special cleaning and packaging.