Ceramic Break, 10KV, .31" (7.9mm) ID, 1.33" CF (DN16 CF) Conflat Flange

Part Number / SKU
Availability: In Stock
Have a Question? Our customer service team is ready to help! Monday - Friday 9am - 6pm PST Call 1.510.265.3500 or Email Us.

MDC Precision offers a complete line of vacuum breaks, also known as electrical isolators, for demanding ultra-high vacuum (UHV) applications and environments. Composed of metal adapters brazed to each end of an insulating ceramic tube that provides voltage isolation between the conductive metal ends, vacuum breaks provide an electrical break between the vacuum chamber and other external components, as well as electrostatic discharge (ESD) protection of sensitive components in the vacuum system. 

Constructed using high-purity alumina ceramic insulators hermetically bonded to low-expansion metal Kovar® sleeve adapters, the electrical breaks are attached to other vacuum components such as flanges, bellows, chambers and weldables using MDC’s proprietary UHV brazing techniques. All materials and braze alloys used are vacuum grade and chosen for their specific characteristics and ability to maintain the integrity of the seals for use in demanding applications and environments. A maximum thermal gradient of 25°C per minute must be observed to preserve the life of the seal. Weldable vacuum breaks are typically installed using one of the following fusing processes: laser, electron-beam or TIG welding. 

  • One rotable and one non-rotatable Del-Seal CF ConFlat® flange mounts
  • Tapered ceramic-to-metal seal design geometry
  • UHV-compatible materials


  • Custom configurations upon request
  • Bellows
  • Rotatable flange mount(s)
  • Non-magnetic, 316LN and titanium materials
  • Enhanced seal joint integrity
  • Exceptional hermiticity and performance
  • High purity and reliability
  • 0.030” (0.8mm) flange-to-flange parallelism for secure connections, leak-free operation


  • Flanges                                 304SS (1.4301 | UNS S30400) Stainless Steel
  • Adapters                               Kovar (UNS K94610)
  • Insulator                               92% min alumina ceramic

Vacuum Range                              1 x 10-10 Torr UHV

Temperature Rating

Del-Seal ConFlat (CF)                     -100°C to 450°C

ISO & Kwik-flange (KF)                  -20°C to 150°C

Weldable                                         -100°C to 450°C

Voltage                                           10,000V DC maximum

Weight                                            1.25 lbs. | 0.6 kg

RoHS / REACH Compliant

  • Fusion Energy
  • Particle Accelerators
  • Research Equipment
  • UHV


Kit Contents

Flange Type

Quantity/ Package

Flange Size

Part Number (SKU)

Install Kit

Copper Gaskets / Hexagonal Bolts

Del Seal CF ConFlat

1 EA

1.33” CF (DN16CF)



More Information


Weight (lb) 1.25
Voltage 10000
Feedthrough Type Breaks and Envelopes
Nominal Tube Size 1/2
Copyright Ā© MDC Precision, LLC 2000-2023