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Multi Wire / Multi Probe Pressure and Vacuum Feedthroughs

Series WF - Pressure and Vacuum Feedthroughs for multiple wire and probes

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When multiple wire 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 wire - sizes from 24 to 8 AWG..

Insulators within WF feedthrough assemblies protect bare wire and provide additional isolation for Kapton® insulated power wire. These are rated max. 55A @ 600Vdc/850Vac max. Feedthroughs with power wire can be supplied as complete assemblies, ready for installation, with wire cut to specified lengths.

WF feedthroughs can also accommodate up to 12, small diameter sensor elements that must be electrically isolated from each other.
  • Seal on Kapton® insulated copper or thermocouple wire – type WFS
  • Seal on bare wire carrying instrumentation voltages – type WFR
  • Seal on small sheathed sensors, max. 0.125” dia. – type WFP
  • Pressure range: Vacuum to 10,000psi *
  • Temperature range: -328°F to +1,600°F * 316L Body (and seat where applicable). Follower and cap in 303 or 304
  • Choice of sealant materials
  • Individual wire can be replaced without complete disassembly
  • Reusable fitting – sealant and internal components replaceable
  • A large range of feedthroughs is available to buy online

    * Dependent on sealant and fitting selected

WFS Series - Body Size, Pressure Guide and available Bore Sizes for NPT Threads2
Kapton® insulated wires - Max 230°C rated

Body Size No. of
Elements		 Size 1 (1/8") No. of
Elements		 Size 2 (1/4") No. of
Elements		 Size 3 (1/2") No. of
Elements		 Size 4 (3/4")
Sealant
G* L N T V G* L N T V G* L N T V G* L T V
Wire Size The maximum guide pressure value (in psi) at 68°F (20°C)is shown for each sealant material according to element size1.
These ratings are a guide and the suitability of any of the products described herein for a particular application
is entirely at the discretion of the purchaser as being the best judge for that particular application.
AWG diam. (mm)
24 Cu or T/C 0.5 2, 4 4300 5800 3600 3600 3600 2, 4 4300 5800 3600 3600 3600    
20 Cu or T/C 0.8   2, 4 10000 10000 5800 3600 6500 6, 8, 12 7900 7900 3600 5000
18 Cu 1.0
16 Cu 1.3
14 Cu 1.6   4, 6, 8
12 Cu 2.0
10 Cu 2.5   2, 4
8 Cu 3.2   3
Series WFS feedthroughs are supplied with Kapton® insulated copper or thermocouple material wire to specified lengths, if required. The wires are fitted in the feedthrough, both ends of each wire, or Thermocouple pair, are identified with numbered markers and the feedthrough is torqued ready for installation.

* Graftite™ sealants are conductive. Extra care must be taken where high voltages are present. Please contact TC Inc for further guidance.
  1. The guide pressures shown for each type of sealant are at 68°F (20°C). Spectite® feedthroughs from TC Inc. have been designed to provide an efficient seal on the elements and restrain them from moving under pressure and vacuum. It is good installation practice to provide additional, mechanical restraint to the elements when differential pressure exceeds 50% of the feedthrough guide pressure value at 68°F (20°C). With an increase in temperature, a reduction in the maximum guide pressure value can be expected. These ratings are a guide and the suitability of any of the products described herein for a particular application is entirely at the discretion of the purchaser as being the best judge for that particular application.
  2. Other types of process connection are available, see Feedthrough Sizes.

Current ratings for Kapton® insulated copper wire:

Wire Size (AWG) 24 20 18 16 14 12 10 8
Max. current rating (A) at 230°C 600V AC / 850V DC max. 5 9 13 17 24 30 40 55

WFR Series - Body Size, Pressure Guide and available Bore Sizes for NPT Threads2
Bare wires - Max 230°C rated

Body Size No. of
Wires		 Size 1 (1/8") No. of
Wires		 Size 2 (1/4") No. of
Wires		 Size 3 (1/2") No. of
Wires		 Size 4 (3/4")
Sealant L N T V L N T V L N T V L T V
Wire Size - AWG The maximum guide pressure value (in psi) at 68°F (20°C)is shown for each sealant material according to element size1.
These ratings are a guide and the suitability of any of the products described herein for a particular application
is entirely at the discretion of the purchaser as being the best judge for that particular application.
24 2, 4 5800 3600 3600 3600 2, 4 5800 3600 3600 3600    
20
18 2, 3, 4, 6, 8 10000 5800 3600 6500
14   2, 4 6, 8, 12 7900 3600 5000
8   2, 4
  1. The guide pressures shown for each type of sealant are at 68°F (20°C). Spectite® feedthroughs from TC Inc. have been designed to provide an efficient seal on the elements and restrain them from moving under pressure and vacuum. It is good installation practice to provide additional, mechanical restraint to the elements when differential pressure exceeds 50% of the feedthrough guide pressure value at 68°F (20°C). With an increase in temperature, a reduction in the maximum guide pressure value can be expected. These ratings are a guide and the suitability of any of the products described herein for a particular application is entirely at the discretion of the purchaser as being the best judge for that particular application.
  2. Other types of process connection are available, see Feedthrough Sizes.

WFP Series - Body Size, Pressure Guide and available Bore Sizes for NPT Threads2
Multiple Sensors - Max 230°C rated

Body Size No. of
Elements		 Size 1 (1/8") No. of
Elements		 Size 2 (1/4") No. of
Elements		 Size 3 (1/2") No. of
Elements		 Size 4 (3/4")
Sealant L N T V L N T V L N T V L T V
Element Size The maximum guide pressure value (in psi) at 68°F (20°C)is shown for each sealant material according to element size1.
These ratings are a guide and the suitability of any of the products described herein for a particular application
is entirely at the discretion of the purchaser as being the best judge for that particular application.
0.020" 2, 4 5800 3600 3600 3600 2, 4 5800 3600 3600 3600    
0.032"
0.040" 2, 3, 4, 6, 8 10000 5800 3600 6500
0.060"   2, 4 6, 8, 12 7900 3600 5000
0.118"   2, 4
0.125"  
  1. The guide pressures shown for each type of sealant are at 68°F (20°C). Spectite® feedthroughs from TC Inc. have been designed to provide an efficient seal on the elements and restrain them from moving under pressure and vacuum. It is good installation practice to provide additional, mechanical restraint to the elements when differential pressure exceeds 50% of the feedthrough guide pressure value at 68°F (20°C). With an increase in temperature, a reduction in the maximum guide pressure value can be expected. These ratings are a guide and the suitability of any of the products described herein for a particular application is entirely at the discretion of the purchaser as being the best judge for that particular application.
  2. Other types of process connection are available, see Feedthrough Sizes.

Pressure and Vacuum Feedthrough Enquiry Form

1. Feedthrough Type

2. Thread Size Required
  see table
3. Element Size
 see table
4. No. of Elements
 see table
5. Sealant Type

6. Quantity Required

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If your enquiry is for more than one style of sensor, please email us with your requirements or use the box below



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