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The High Temperature Extension provides a means to move the packing area (stuffing box) away from the hot zone of a valve. Fins are provided around the packing area to dissipate heat and, with proper cooling of the extension, these valves can be used at 1,000°F (538°C).
Size range. High temperature extensions are available for 1/4" O.D., 3/8" O.D., and 9/16" O.D. tubing size valves in the 30,000 psi series and for all Medium Pressure series valves.
Materials and features. Standard packing is Grafoil. Teflon packing is also available. Nonrotating tip stems prevent galling at the seats and minimize torque requirements for positive shut off.
When ordering, simply add the suffix “-HT” to the standard valve catalog number (example: 30-11HF4-HT).
Note: These valves may also be used in cryogenic applications. Teflon packing supplied.
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