Series PSF Split Pressure and Vacuum Feedthroughs for Single Sensors

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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 0.040" to 0.750" diameters
Guide pressure range: Vacuum up to 670 bar
Temperature range: -328°F to +1600°F
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" NPT, 1/4" BSPT, 1/4" BSPP	0.250"	1/2" NPT, 1/2" BSPT, 1/2" BSPP	0.393"	3/4" NPT, 3/4" BSPT, 3/4" BSPP	0.750"
Alternative Thread Sizes	Max. Tube Size	Alternative Thread Sizes	Max. Tube Size	Alternative Thread Sizes	Max. Tube Size
M10x1.0, 7/16" UNF-20	0.250"	3/8" BSPT, 3/8" BSPP, 3/8" NPT	0.393"	M22x1.5, 3/4" SAE-16, 7/8" UNF-14	0.750"
M12x1.5, 1/2" UNF-20	0.250"	M14x1.5, 7/16" SAE-20, 9/16" UNF-18	0.393"	M24x2.0, 7/8" SAE-14, 1" UNF-14	0.750"
		M16x1.5, 1/2" SAE-20, 5/8" UNF-18	0.393"
		M20x1.5, 9/16" SAE-24, 3/4" UNF-16	0.393"

Size 5 (1" Thread or equivalent)				Clearance Sizes for split internal components
Standard Thread Sizes	Max. Tube Size
1" NPT, 1" BSPT, 1" BSPP	1.00"
Alternative Thread Sizes	Max. Tube Size
M27x2.0, 1+3/16" SAE-12, 1" UNF-14	1.00"			Body Size	Max. clearance
M33x2.0, 1+5/8" SAE-12, 1+1/8" UNF-14	1.00"			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	Operating Temperature Range	Re-usable	Material definition and properties
Neoprene	N	Green	-40°F to +195°F	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°F to +435°F (intermittently to 545°F)	Yes	Fluoroelastomer. Resists hydrocarbons, corrosive chemicals and petroleum. Solvent, acid and base resistant. Low permeation rate. Mechanically robust at high temperatures.
PTFE	T	White	-328°F to +480°F	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	-328°F to +1020°F (to +1600°F 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	-328°F to +1600°F	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˝ NPT – 0.060 – G – B BSPT If a B cap is used with a weld neck fitting, then the thread form must be specified.

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˝ NPT – 0.060 – G – B BSPT

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

Style	Part Code	Maximum Compatible Body Size	Outside Diameter	Thickness
KF FLANGE	KF16	Size 2	1.181"	0.200"
	KF25	Size 3	1.575"	0.200"
	KF40	Size 5	2.165"	0.200"
	KF50	Size 5	2.953"	0.200"
CF FLANGE	DN16CF	Size 3	1.331"	0.299"
	DN25CF	Size 4	2.126"	0.469"
	DN35-40CF	Size 5	2.752"	0.500"
	DN50CF	Size 5	3.374"	0.630"
	DN63CF	Size 5	4.500"	0.681"

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 Inc. for details.

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

Body Size		Size 2 (1/4")					Size 3 (1/2")					Size 4 (3/4")				Size 5 (1")
Sealant		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 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.
inches	mm
0.040	1.0	6900	6900	4300	3000	6500
0.059	1.5
0.062	1.59
0.080	2.0	6900	8800	2600	1100	2600
0.118	3.0						7200	9700	1400	1400	1400
0.125	3.2
0.157	4.0	3700	8500	1400	720	2100
0.177	4.5
0.187	4.76
0.236	6.0	3300	7200	1100	580	1700	4700					1400	1800	720	2000	720	1400	290	1400
0.250	6.35	3300	7200	1100	580	1700						1400			2000	720			1400
0.312	8.0								1000	1300	1100	870			1100	430			580
0.375	9.5						4300	7200	870	1100	430	870			1100	430			580
0.393	10.0						4300	7200	870	1100	430	430			720	290			290
0.472	12.0																720
0.500	12.7
0.625	15.88
0.750	19.05

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.
Other types of process connection are available, see Feedthrough Sizes.
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 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

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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Series PSF Split Pressure and Vacuum Feedthroughs for Single Sensors

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

Enquiry Form - Split Feedthroughs for Single Elements

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