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F L E X I T A L L I C L I M I T E D
PO BOX 3 MARSH WORKS DEWSBURY ROAD
CLECKHEATON WEST YORKSHIRE BD19 5BT
TEL: 01274 851273 FAX: 01274 851386
PRODUCT
REFERENCE ENVIROFLEX 500
DESCRIPTION Enviroflex 500 is a low emission valve stem sealing system.
Enviroflex 500 is supplied as a five ring set, consisting of three moulded
graphite rings and two braided header rings specially formulated from
high performance carbon yarn. The moulded graphite rings are entirely
free of PTFE but there is a small amount in the header rings.
Where the PTFE is of concern as a potential source of corrosion, then
Enviroflex 506 is the appropriate form to select.
SERVICE Enviroflex 500 has been developed for use in Linear and Rotary valves,
both control and hand operated. Enviroflex 500 has exceeded the most
stringent requirements for fugitive emissions, resulting in less product
loss and reduced emission penalties.
Enviroflexhas Fire Test approval in accordance with API 607.
pH Range 0 - 14*
Maximum recommended service temperature 350 0C (6620F)**
Maximum recommended service pressure 860 bar
(12470 psi, 86 MPa)
* Not recommended for use with strong oxidising agents.
** For service above 3500C, the temperature at which PTFE will start to
decompose and cause stem corrosion, Enviroflex 506 is recommended
as it is entirely free of PTFE.
Please note that statements of operating limits are not an indication that
these values can be used simultaneously or that they apply in all chemical
media.
AVAILABILITY Enviroflex 500 can be manufactured in sizes to fit stuffing boxes of most
valves, and is available as split ring form . Please contact our sales offices
for further details.
PDS 794 03/2003
This Data Sheet relates to the material as supplied. The information contained herein is given in good faith, but no
liability will be accepted by the Company in relation to same.
The acquisition of additional information may necessitate revision to parts, or all, of this Data Sheet, and such
information will be supplied as it becomes available.
The information given and, in particular, any parameters, should be used for guidance
purposes only. The Company does not give any warranty that the product will be suitable for the use intended by
the Customer.
ENVIROFLEX
500
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