CF (ConFlat*) flanges use a clamping mechanism to hermetically seal a copper gasket between the chamber wall and the feedthrough. This minimizes the effect of tightening the housing rather than the jamnut in a vacuum face seal design. A series of bolts secure the feedthrough directly to the chamber wall. CF flanges can be more time consuming to install and uninstall than a KF-style flange, with specialty tooling and know-how. Our CF feedthroughs are mounted from the atmospheric side of the chamber, giving greater accessibility to the user to install the feedthrough properly.
Douglas Electrical Components manufactures hermetic electrical feedthroughs utilizing a CF flange to create convenient mounting and installation. Our vacuum rated CF feedthroughs are available in various electrical connections including connectors, wires, cables, and optical fibers.
Our epoxy technology permits us to not only create high density feedthroughs, but also combine multiple interfaces into the same feedthrough flange, reducing overall feedthrough cost and saving space. This can be as simple as integral thermocouple wire to connectorized harnesses with integral shielding, strain relief, and sleeves.
Our CF feedthroughs provide further flexibility with their ability to have different electrical interfaces on each side of the chamber. Many customers will combine connectors with integral wires to simplify installation in or out of a vacuum chamber. Douglas can integrate the exact conductors you need to transmit power or signal.
Work with our technical sales engineers to confirm the electrical connection you prefer and we’ll design and quote the feedthrough that best aligns to your needs. Additionally, we offer competitive lead times with expedites as low as one week possible.
*ConFlat is a registered trademark of Agilent Technologies
Features
PERFORMANCE CAPABILITIES
- < 1×10-8 cc Helium per second standard; others available upon request
- Operating temperatures range from 4 K (LHe) through high temperatures of 200°C
- Standard tooling and LEAN operational set up to keep your footprint smaller and overhead down, while maintaining quality
ELECTRICAL CONNECTION TYPES
- Connectors
- Wires
- Cables
- Optical Fibers
- Circuits
COMMON CONNECTOR TYPES
- MIL-spec connectors including MIL-DTL-38999, MIL-DTL-5015, MIL-DTL-26482, MIL-DTL-24308, and MIL-DTL-83513
- D-sub hermetic connectors for vacuum applications
- Micro-D hermetic connectors
- Regular and standard density (HDM)
- High density (HDD)
- Nano-D
- Coaxial connectors (SMA, BNC, Triax, SHV, and more)
- Thermocouple
- Convenience power cables with integral connectors
- USB including Type A and C
- RJ-45 Ethernet connectors
- And more!
CONNECTOR BRANDS WE SEAL, INTEGRATE, & CUSTOMIZE
- TE Connectivity (formerly Tyco / Deutsch)
- Molex / Brad Harrison
- Souriau
- Amphenol
- Mencom
- Fischer
- Lemo
- And more
Featured Products
Conflat Feedthroughs Configurations
CF Feedthroughs
| Product Image | Product Number | Housing Material | Housing Size | Housing Type | Wire Type | Wire Gauge | Conductor Count | Vacuum Leak | Electrical Hipot |
|---|---|---|---|---|---|---|---|---|---|
 | 28315 | Stainless Steel | 2.75″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 60 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
 | 28312 | Stainless Steel | 2.75″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 20 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
 | 28310 | Stainless Steel | 2.75″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 5 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
 | 28309 | Stainless Steel | 2.75″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 2 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
 | 28306 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 12 AWG | 12 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28302 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 16 AWG | 20 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28301 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 16 AWG | 12 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28297 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 20 AWG | 20 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28293 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 24 AWG | 32 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28292 | Stainless Steel | 2.75″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 24 AWG | 20 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28288 | Stainless Steel | 1.33″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 10 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28287 | Stainless Steel | 1.33″ | Conflat flange | Thermocouple Teflon® Insulation ISA Type E,J, K or T | 24 AWG | 5 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28284 | Stainless Steel | 1.33″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 12 AWG | 3 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28285 | Stainless Steel | 1.33″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 12 AWG | 6 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
| 28276 | Stainless Steel | 1.33″ | Conflat flange | Stranded MIL-spec 1000V PTFE Insulated | 24 AWG | 12 | <1 x 10-8cc He/sec. Contact factory for more options. | 1000 VAC |
FAQ
Does Douglas Electrical Components stock CF feedthroughs?
No, but we do offer competitive lead times with expedites possible. Contact us for a quote.
What are the advantages of a CF flange?
- Standard sizes/interfaces; equipment commonly pre-designed with CF flange interface
- Installation from outside the chamber
- Vacuum rated with low leak rates
What are some disadvantages of CF flanges?
- Bulky
- Time consuming and cumbersome to install
- Gasket pricing can be expensive
Do you offer other flanges?
Yes. Douglas can offer virtually any flange type. Similar to CF flanges, Douglas offers KF/QF flanges for vacuum feedthrough applications. Additionally customers can specify NPT, radial O-ring, SAE, and other mechanical interfaces that operate in vacuum and positive pressure applications.
Image Library
PotCon CF Hermetic Feedthrough
RBTW hermetic connector to thermocouple wire feedthrough with CF flange
Multi-conductor type CF Feedthru
Hermetic CF wire and thermocouple wire feedthrough with integral connectors
CF feedthrough with RJ45 and d-sub connector
CF feedthrough with RJ45 and d-sub connector; combine various connection types with minimal to no tooling.
CF hermetic feedthru USB/CAT6
CF hermetic feedthrough featuring both USB and CAT6
Hermetic Terminal Seal with stud to wire assembly
Terminal to wire hermetic seal design with CF Flange.
Custom CF D-sub Tube feedthrough
Unique hermetic solutions aimed at maximized signal density in vacuum chambers with limited space.
CF RFW PotCon custom hermetic feedthrough
CF RFW PotCon custom hermetic feedthrough
Solder Cup CF Feedthrough
CF feedthrough with integral MIL-spec connector and solder-cup interface
DuctorSeal CF electrical feedthrough
DuctorSeal CF electrical feedthrough with connector-to-wire setup.
CF Feedthrough DuctorSeal
DuctorSeal CF flange hermetic wire feedthrough for vacuum applications.
Hermetic Type-N Coaxial Feedthru
Type-n hermetic coaxial feedthrough design with CF flange
D-sub & RJ45 CF Feedthrough
CF electrical feedthrough with D-sub and RJ45 ethernet connectors
CF Connector-to-Wire Feedthrough
Hermetic CF MIL-spec connector to wire feedthrough
CF hermetic feedthrough with milspec connector
CF hermetic feedthrough with MIL-spec connector
Dual Connector CF Feedthru
Dual 38999 hermetic feedthrough CF flange
CF Feedthru Side View
Side view of a hermetic electrical feedthrough with CF Flange
Documents & Downloads
Downloads
Douglas Electrical Components Catalog
Space Simulation Application Note
Glove Box Feedthrough Application Note
Cryogenic Feedthrough Capabilities
Whitepapers
Types of Hermetic Seals: Glass-to-Metal Vs. Epoxy
The Six Challenges Of Specifying And Procuring Hermetic Feedthroughs For Space Simulation
Material Data
RoHS Certificate of Conformance
REACH Statement
NASA Outgassing Report, 1469-1481
NASA Outgassing Report, 29885-1481
NASA Outgassing Report, 7113-1470
Certificates & Standards
ISO 9001:2015 Certificate
ISO 14001:2015 Certificate