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Spectite sealed feedthroughs are essential when probes, sensors, electrodes, wires and other types of static elements need to be sealed as they pass through a pressure or environmental boundary. They inhibit the leakage of gases or other media and restrain the elements from moving in the assembly because of differential pressure.
In some assemblies, elements are also electrically isolated from the feedthrough body and from each other. Sealed feedthroughs, sometimes called sealing glands, are used to seal elements under the most arduous conditions and have many applications in a wide variety of industries - including Process plants, Power generation, Vacuum equipment, Petro-chemical, Pharmaceutical, Glass production, and Semiconductor fabrication.
To learn which feedthrough is right for you, click here to use Spectite's Interactive Guide.
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Series PF - Feedthroughs for single elements
These feedthroughs are designed for sealing single elements, usually sensors, probes or tubes, where they penetrate a pressure or environmental boundary.
Common applications include sealing sheathed thermocouples and resistance thermometers, small-bore tubes and other types of sensor where they enter a process enclosure.
Series PF feedthroughs seal elements from 0.020" to 0.75". There are five body sizes having 1/16", 1/8", 1/4", 1/2", and 3/4" process connections with NPT threads. Other thread types are avilable on request. View specifications.
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Series MF - Feedthroughs for multiple elements
A single access port into an enclosure or process vessel is all that is needed to allow multiple probes, sensors, etc., to pass through an environmental or pressure boundary using a single feedthrough assembly.
Series MF feedthroughs can seal multiple elements within a single assembly including typically up to 40 x 0.040” dia., up to 12 x 0.125” or up to 4 x 0.250”. Please refer to the table for further details of feedthrough capacity and sizes of elements.
There are four body sizes having 1/8", 1/4", 1/2" anmd 3/4" process connections with NPT threads. Other thread types available on request. View specifications.
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Series PSF and MSF - For single and multiple elements - Series PSF (single element) and MSF (multiple elements) feedthroughs are similar to series MF feedthroughs, but have split internal components.
This permits elements, that have a larger diameter section other than at the sealing point and can pass through the feedthrough body but not through the internal components, to be installed easily. Examples are probes with connectors or sensors with potting adaptors.
Therea are three body sizes having 1/4:, 1/2: and 3/4: NPT process connections. Other process threads are also availale. Spectite feedthroughs are designed for easy of assembly and installation. Elements can be adjusted, removed and replaced when ot under pressure or vacuum conditions. View specifications.
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Series WF - For multiple wires & probes - When multiple wires must pass through a pressure boundary, series WF feedthroughs can provide an efficient seal without recourse to epoxies or other non-adjustable fixture methods.
Assemblies may be specified according to the type of element required to pass through the feedthrough and are suitable for up to 12 bare or insulated wires - sizes from 24 to 8 AWG.
Insulators with WF feedthroughs protect bare wires and provide additional isolation for Kapton insulated power wires. They are rated max. 55A @ 600Vdc/850Vac. Feedthroughs with power wires can be supplied as complete assemblies, ready for installation with wires cut to specified lengths. WF feedthroughs can also accomodate up to 12 small diameter sensor elements that must be electrically isolated from each other. View specifications.
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Series EF - The electrode mounted in these feedthroughs enables high voltage / current supplies in process enclosures, autoclaves, vacuum furnaces and reactor vessels to power heaters, electric motors and other devices needing high power supply.
Feedthroughs are available with three sizes of copper electrodes rated 40A, 100A & 200A at 2kV max. Stainless steel conductors, that have a lower current rating than copper electrodes, can be specified instead of copper. These are often used when temperatures exceed 720°F (380°C). Nickel conductors may also be specified to special order.
Series EF feedthroughs are usually supplied pre-torqued for immediate installation. Integral insulators are Alumina. View specifications.
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Series HF - - High density, insulated wire, sealed tube assemblies - A Teflon-lined, stainless steel tube is swaged over multiple, usually Teflon, insulated, singlecore copper and/or thermocouple-material wires to make a continuous wire, high-density, sealed feedthrough tube. These are used for thermocouples, resistance thermometers and low voltage instrumentation. The
sealed tube assembly is usually mounted in a series PF or MF feedthrough. Series HF feedthroughs are manufactured with customer-specified wire lengths.
Epoxies and other sealants are not used in the construction of HF feedthroughs. They are suitable for use where outgassing is not permitted. View specifications.
* dependent on sealant and fitting selected
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