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ENVIROFLEX™

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500

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PRODUCT

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REFERENCE

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FLEXITALLIC LIMITED

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PO BOX 3 MARSH WORKS DEWSBURY ROAD

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CLECKHEATON WEST YORKSHIRE BD19 5BT

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TEL: 01274 851273 FAX: 01274 851386

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ENVIROFLEX™ 500

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DESCRIPTION

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SERVICE

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Enviroflex™500 is a low emission valve stem sealing system.

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Enviroflex™500 is supplied as a five ring set, consisting of three moulded

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graphite rings and two braided header rings specially formulated from

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high performance carbon yarn. The moulded graphite rings are entirely

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free ofPTFE but there is a small amount in the header rings.

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Where the PTFE is of concern as a potential source of corrosion, then

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Enviroflex™506 is the appropriate form to select.

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Enviroflex™500 has been developed for use in Linear and Rotary valves,

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both control and hand operated. Enviroflex™500 has exceeded the most

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stringent requirements for fugitive emissions, resulting in less product

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loss and reduced emission penalties.

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Enviroflex™500has Fire Test approval in accordance with API 607.

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pH Range 0 -14*

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Maximum recommended service temperature 350 °C (662°F)**

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Maximum recommended service pressure

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860 bar

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(12470 psi, 86 MPa)

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* Not recommended for use with strong oxidising agents.

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** For service above 350°C, the temperature at which PTFE will start to

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decompose and cause stem corrosion, Enviroflex™506 is recommended

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as it is entirely free of PTFE.

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Please note that statements of operating limits are not an indication that

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these values can be used simultaneously or that they apply in all chemical

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media.

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AVAILABILITY

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Enviroflex™500 can be manufactured in sizes to fit stuffing boxes of most

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valves, and is available as split ring form. Please contact our sales offices

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for further details.

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PDS794 03/2003

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This Data Sheet relates to the material as supplied. The information contained herein is given in good faith, but no

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liability will be accepted by the Company in relation to same.

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The acquisition of additional information may necessitate revision to parts, or all, of this Data Sheet, and such

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information will be supplied as it becomes available.

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The information given and, in particular, any parameters, should be used for guidance

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purposes only. The Company does not give any warranty that the product will be suitable for the use intended by

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the Customer.

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