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Parker Hannifn Corporation
Parfex Division
Ravenna, OH
IS – Intermittent* Steam Purge Bundles
for Freeze Protection
Power Generation Catalog Number 4200-M-2
General Design
Parfex IS-Intermittent Steam purge bundles are
thermally insulated with a composite layer of
fberglass that allows for occasional high-temperature
steam purge up to 1100°F (593°C) while at the same
time ensuring freeze protection during winter using
self-regulating heating cables.
Parfex IS-Intermittent Steam purge bundles are
properly insulated to ensure that the outer surface
area of the bundle is at or below 140°F (60°C),
meeting NEC Personnel Protection Code 427.12,
during steam purge conditions at the highest
specifed ambient temperature.
IS- Intermittent Steam purge bundles are designed
to provide a freeze protection temperature of 40°F
(4.4°C) at the lowest specifed ambient temperature.
Parfex IS-Intermittent Steam product are readily
available in single and double tube. The most
common tube sizes requested being 3/8” and 1/2”
Seamless Stainless Steel 316/316L/316H alloys in
either an average wall specifcation ASTM A269 or
minimum wall specifcation ASTM A213. Other alloys
and standards are available.
We also have available many other sizes; including
metric sizes 6 mm, 8mm, 10mm and 12mm.
(See How-to-order)
Testing
All IS-Intermittent Steam products are pressure tested
prior to shipment. Third party testing and witnessing
is available upon request, including DNV, ABS and
Lloyd’s Register. Contact factory for complete details.
Jacketing Materials
Black UV resistant FR-PVC is our standard material,
however other jacketing materials are available upon
request, including non-halogenated FR-TPE and
Urethanes. Color jackets are also available upon
request. (See How-to-order)
Heating Cables
Cables are available in 120V and 208-277 volt, with
Heat outputs of 5, 10, 15 and 20 watt/ft.
Parfex standard IS designs come with an internal
tinned copper braid on the heating cable for
grounding purpose and a Fluoropolymer jacket over
the heater to provide additional protection against
harsh environments.
Intermittent Design *
Bundles can be steam purged for a period of 5
minutes once a day. During steam purge the outer
jacket surface temperature will not exceed 140°F
(60°C).
Section 2 —
Freeze Protection Bundles Designed For Intermittent (5 minutes) High-Temperature Steam Purge