Pressure and Vacuum Sealed Feedthroughs from TC Ltd.
01895 252222 | info@spectite.co.uk

Series PSF Split Pressure and Vacuum Feedthroughs for Single Sensors

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a Feedthrough?

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01895 252222 or send us an email

Series PSF are similar to series PF feedthroughs, but have split internal components.

This permits components larger than the element being sealed to be passed through the gland body during installation. Examples are probes with fitted connectors and sensors with pot seals or bulbous tips.

There are four body sizes having 1/4", 1/2", 3/4" and 1" process connections in either BSPT (conical gas or DIN 2999 'R') and NPT threads.

Spectite® feedthroughs are designed for ease of assembly and installation. Elements can be adjusted, removed and replaced when not under pressure or vacuum conditions.

  • Individual elements can be easily replaced without the complete disassembly of the fitting
  • Internal components - follower, sealant and seat are split to allow easy installation of elements with fitted connectors or large diameter sections
  • Designed for easy installation of single elements 1.0mm to 19.05mm diameters
  • Guide pressure range: Vacuum up to 670 bar
  • Temperature range: -200°C to +870°C
  • 316L Stainless steel wetted parts (see Cutaway View)
  • Choice of sealant materials
  • Immersion length of each element easily adjusted
  • Reusable fitting - internal components replaceable
Standard Body Style ('A' Cap) Threaded Extension ('B' Cap) Weld Neck Flanges
Standard body style suitable for most applications. Allows the gland to be terminated into the process as well as to a terminal head or conduit at the opposite end to the process. Supplied without thread for permanent installation into the process by welding.
Specify as 'WELD' for the thread size in the order code.
For termination to a mating flange within the process, see Optional Flanges for details of the flanges available as standard.
Size 2 (1/4" Thread or equivalent) Size 3 (1/2" Thread or equivalent) Size 4 (3/4" Thread or equivalent)
Standard Thread Sizes Max. Tube Size Standard Thread Sizes Max. Tube Size Standard Thread Sizes Max. Tube Size
1/4" BSPT, 1/4" BSPP, 1/4" NPT 6.35mm 1/2" BSPT, 1/2" BSPP, 1/2" NPT 10.0mm 3/4" BSPT, 3/4" BSPP, 3/4" NPT 19.05mm
Alternative Thread Sizes Max. Tube Size Alternative Thread Sizes Max. Tube Size Alternative Thread Sizes Max. Tube Size
M10x1.0, 7/16" UNF-20 6.35mm 3/8" BSPT, 3/8" BSPP, 3/8" NPT 10.0mm M22x1.5, 3/4" SAE-16, 7/8" UNF-14 19.05mm
M12x1.5, 1/2" UNF-20 6.35mm M14x1.5, 7/16" SAE-20, 9/16" UNF-18 10.0mm M24x2.0, 7/8" SAE-14, 1" UNF-14 19.05mm
  M16x1.5, 1/2" SAE-20, 5/8" UNF-18 10.0mm  
M20x1.5, 9/16" SAE-24, 3/4" UNF-16 10.0mm
 
Size 5 (1" Thread or equivalent)   Clearance Sizes for split internal components
Standard Thread Sizes Max. Tube Size
1" BSPT, 1" BSPP, 1" NPT 25.4mm
Alternative Thread Sizes Max. Tube Size
M27x2.0, 1+3/16" SAE-12, 1" UNF-14 25.4mm Body Size Max. clearance
M33x2.0, 1+5/8" SAE-12, 1+1/8" UNF-14 25.4mm Size 2 (1/4") 8.2mm diam.
    Size 3 (1/2") 12.2mm diam.
    Size 4 (3/4") 20.2mm diam.
    Size 5 (1") 25.6mm diam.
 
Sealant Material Code Colour Example Operating Temperature Range Re-usable Material definition and properties
Neoprene N Green -40°C to +90°C Yes Synthetic rubber based on polychloroprene. The elastic properties of the polymer are enhanced by vulcanization. It is much more resistant to heat, light, oxidation, and petroleum than ordinary rubber.
Viton® V Brown -40°C to +225°C
(intermittently to +285°C)
Yes

Fluoroelastomer. Resists hydrocarbons, corrosive chemicals and petroleum. Solvent, acid and base resistant. Low permeation rate. Mechanically robust at high temperatures.

PTFE T White -200°C to +250°C Yes Polytetrafluoroethylene. FDA approved grade to Title 21-CFR 17. 1550 and is approved to US Pharmacopoeia Class VI. Has smooth, non-wetting, hydrophobic surfaces that resist biofilm buildup and the lowest coefficient of friction of any solid material. Low thermal transfer.
Graftite™ G Grey / Black -200°C to +550°C
(to +870°C in a reducing atmosphere)
No Graphite 98% purity. Impermeable to gases and liquids. Resistant to most media, not 'wetted' by molten metals or salts. Asbestos-free. No ageing or embrittlement. Good resistance to thermal shock. Conductive material (not electrically isolated).
Lava L Grey Stone -200°C to +870°C No

Natural Magnesium Silicate (Soapstone, Steatite or Rock Talc). Crushes to a powder when compressed. Hygroscopic. Porous to light gases. Unsuitable for use with liquid media and in most vacuum applications.

Other sealant materials may be specified, usually for the individual special requirements of particular applications. Please contact us for assistance.
Style 'A' (Supplied as standard) Description Style 'B' (Alternative cap) Description

STANDARD
Standard Fitting with single thread for direct mounting into process.

Standard Fitting with a Style B threaded extension for conduit/terminal head or enclosure connection. The thread form is the same as the process thread unless otherwise specified.

If a different thread form is required, please specify after the 'B' in the order code, for example:
PSF2 - 1/4" BSPP - 1.5 - G - B NPT

If a B cap is used with a weld neck fitting, then the thread form must be specified.

Style Example Part Code Maximum Compatible
Body Size
Outside
Diameter
Thickness
KF FLANGE KF16 Size 2 30mm 5.08mm
KF25 Size 3 40mm 5.08mm
KF40 Size 5 55mm 5.08mm
KF50 Size 5 75mm 5.08mm
CF FLANGE DN16CF Size 3 33.8mm 7.6mm
DN25CF Size 4 54.0mm 11.9mm
DN35-40CF Size 5 69.9mm 12.7mm
DN50CF Size 5 85.7mm 16.0mm
DN63CF Size 5 114.3mm 17.3mm
All flanges are supplied in 304L stainless steel as standard. Hygienic and Food Grade Flanges are also available - please contact us for further details.
CF Flanges are non-rotatable (fixed) type and comply with ISO3669-2017.
KF Flanges are compatible to the ISO Standard 2861 Specification.
Many other styles of flange available on request (DIN, JIS, ANSI, etc.), contact TC Ltd. for details.

Body Size, Pressure Guide and available Bore Sizes for BSPT, BSPP and NPT Threads2

Body Size Size 2 (1/4") Size 3 (1/2") Size 4 (3/4") Size 5 (1")
Sealant
G L N T V G L N T V G L T V G L T V
Element Sizes (dia)3 The maximum guide pressure value (in bar) at 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.
inches mm  
0.040 1.0 480 480 300 210 450      
0.059 1.5
0.062 1.59
0.080 2.0 480 610 180 80 180
0.118 3.0 500 670 100 100 100
0.125 3.2
0.157 4.0 260 590 100 50 150
0.177 4.5
0.187 4.76
0.236 6.0 230 500 80 40 120 330 100 130 50 140 50 100 20 100
0.250 6.35
0.312 8.0   70 90 80 60 80 30 40
0.375 9.5 300 500 60 80 30
0.393 10.0 30 50 20 20
0.472 12.0   50
0.500 12.7
0.625 15.88  
0.750 19.05
  1. The guide pressures shown for each type of sealant are at 20°C. Spectite® feedthroughs from TC Ltd. 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 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.
  3. The element diameters shown are the common sizes routinely demanded for general industrial applications. Other sizes can be supplied between the minimum and maximum diameters shown.
Size 2 (1/4" Thread or equivalent) Size 3 (1/2" Thread or equivalent) Size 4 (3/4" Thread or equivalent)
 
Size 5 (1" Thread or equivalent)   Clearance Sizes for split internal components
Body Size Max. clearance
Size 2 (1/4") 8.2mm diam.
Size 3 (1/2") 12.2mm diam.
Size 4 (3/4") 20.2mm diam.
Size 5 (1") 25.6mm diam.
 
Please note: the overall length will vary slightly depending on the sealant used and the tube size.

Enquiry Form - Split Feedthroughs for Single Elements

1. Feedthrough Body Size

2. Thread Size

3. Element Diameter

3. Element Diameter

3. Element Diameter

3. Element Diameter

3. Element Diameter

4. Sealant Material

5. Cap Style

5a. B Cap Thread Size (other)

6. Optional Flange

7. Quantity Required

Additional Information

If you are unsure about the specification of the fitting you require, please use the box below to tell us about your application and one of our experienced engineers will call you back to help guide you through the selection process.

Otherwise, please use the drop down boxes provided and we will arrange for a quotation to be sent to you.



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