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Industrial Excess Flow Valves

Features

Open Position

Flow

Choice of tube, pipe, or face seal end connections

  • eases installation

  • increases system versatility

  • lowers overall cost.

Tripped Position

Operation

The spring-loaded poppet remains in the open position during normal system operation. Should an excess ow 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. The ow through the bleed vent of a standardXS series valve is less than 1 % of the ow rate in the trip range.

  • Medium- and low-flow springs are available as an option. For valves with either of these spring options, the flow through the bleed vent may be greater than 1 % of the flow rate in the trip range. See the Swagelok XS Series Excess Flow Valve technical report, MS-06-11, for more details.

Slotted poppet

  • improves performance and reliability

  • provides high-ow 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.

Pressure-Temperature Ratings

Ratings based on uorocarbon FKM O-rings. See Optional O-Ring Materials, page 4.

Pressure ratings may be limited by the end connection. See Ordering Information and Dimensions, page 4.

ASME Class Material Group Material Name Temperature, °F (°C)

2500 2.2 316 SS Working Pressure, psig (bar)

–10 (–23) to 100 (37) 200 (93) 250 (121) 300 (148) 400 (204)

6000 (413) 5160 (355) 4910 (338) 4660 (321) 4280 (294)

For more information about valves with tube fitting end connections, see Swagelok® Tubing Data, MS-01-107.

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