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.

Specifications Working Pressure Temperature Range Body Material O-Ring Material End Connections • Types • Sizes

Up to 6000 psig (413 bar) –10 to 400°F (–23 to 204°C) 316 stainless steel Fluorocarbon FKM 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

More Information
Download the Industrial Excess Flow Valves—XS Series catalog.
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Operation
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.

Features

• 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 safety.
• Bleed vent
  • eliminates complex bypass mechanisms
  • allows spring to reset poppet automatically.
• All metal seat
  • improves durability
  • requires no maintenance.

Testing
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.

Options

• Optional O-ring material
• PEEK backup ring
• Special cleaning and packaging.