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Miniature Modular Stream Selection Valves Switching Valve CPAC NeSSI Workshop May 11, 2006. © Swagelok Company, 2006. Stream Selection Background. Select from an array of similar process samples for a single analyzer (CEM – CO, CO 2 , SO 2 , NO x ,…) Sample must be timely and pure

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Miniature Modular

Stream Selection Valves

Switching Valve

CPAC

NeSSI Workshop

May 11, 2006

© Swagelok Company, 2006


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Stream Selection Background

  • Select from an array of similar process samples for a single analyzer

    (CEM – CO, CO2, SO2, NOx,…)

  • Sample must be timely and pure

  • To reduce mixing due to valve failure, standard selection designs use double block and bleed methods.

to analyzer




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Double Block and Bleed – Traditional

to analyzer

Stream 1

Stream 2

Stream 3

to vent


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Double Block and Bleed – Traditional

Stream 1

to analyzer

Stream 2

Stream 3

to vent


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Double Block and Bleed – Traditional

Stream 1

to analyzer

Stream 2

Stream 3

to vent


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Double Block and Bleed – Traditional

Stream 1

to analyzer

Stream 2

Stream 3

to vent


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Double Block and Bleed – Traditional

Stream 1

to analyzer

Stream 2

Stream 3

to vent


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Double Block and Bleed – Traditional

Stream 1

to analyzer

Stream 2

Stream 3

to vent







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0.795

0.728

0.741

0.783

SSV – Outlet section


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SSV Features

Integrated Outlet Flow Loop- Provides consistent flow regardless of how many streams are added - Ensures fast efficient purging


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SSV Features

  • Double block-and-bleed function in one compact valve module

  • System pressures to 250 psi, 500 psi option

  • Temperatures to 300 oF

  • 40 psi actuator pressure

  • 316 SS construction, Viton elastomers

  • 1/8” FNPT and ANSI/ISA 76.00.02 configurations


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SSV Features

Unique vented air gap - Prevents system media from entering air actuator - Prevents air actuator gas from mixing with system media - Optional threaded version available


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SSV Features

Easy to assemble and maintain

  • All process connections in the base block

  • DBB Valve Module easily removed with two screws

  • O-ring kits available


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SSV Features

  • Large diameter piston rises above cylinder

  • Side of the piston is green

  • Provides visual and tactile indication of open or closed

  • Colored button on top for stream identification


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Summary

  • Stream Selection demands pure fluid provided in a timely fashion

  • NeSSI moves components to modularization and miniaturization

  • Swagelok’s SSV product provides pure samples at consistently high flow rates within a single modular position


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Pneumatically Actuated Switching Valve

© Swagelok Company, 2006


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Pneumatically Actuated Switching Valve

© Swagelok Company, 2006



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