Vacuum components - KF vacuum fittings and flanges

Most of our KF parts that come into contact with vacuum are made of stainless steel. We have most fittings on stock. Such as clamps, O-rings, reductions, soldering flanges, blind flanges.  What we do not have we can often manufacture within a few days.

The KF or NW assembly consists normally of two identical flanges, a center-ring, an aluminum clamp with a wing nut fastener to be able to frequently connect and disconnect the flanges  without any tools. The flange surfaces compress an O-ring held in place by a metal centering ring.

Flanges

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Blanking flange or blank

Number	Size	A	B	C
L31119	NW10KF	30	12.2.	5
L31120	NW16KF	30	17.2	5
L31121	NW25KF	40	26.2	5
L31122	NW40KF	55	41.2	5
L31123	NW50KF	75	52.2	5

Stainless Steel. 

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Very short weld flange.

Number	Size	A	B	C	D
L31126	NW16KF	30	17.2	20.5	19.3
L31127	NW25KF	40	26.2	29	25.7
L31128	NW40KF	55	41.2	44.7	38.4
L31129	NW50KF	75	52.2	57.4	51

Stainless Steel. 

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Short weld flange. Half nipple.

Number	Size	A	B	C
V31131	NW16KF	30	20	25
L31133	NW25KF	40	28	25
L31135	NW40KF	55	45	25
L31136	NW50KF	75	57	25

Stainless Steel. 

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Long weld flange.

Number	Size	A	B	C
V31141	NW16KF	30	20	50
L31143	NW25KF	40	28	50
L31145	NW40KF	55	45	50
L31146	NW50KF	75	57	50

Stainless Steel. 

Clamps, Center rings or centering rings with seal and caps

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Clamp

Number	Size	A	B	C
V31105	NW10/16KF	61	45	16
V31106	NW20/25KF	72	55	16
V31107	NW32/40KF	90	70	16
V31108	NW50KF	113	90	20

Nickel-plated Al

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Nail clamp

Number	For Size	A	Number per flange	Bolt
V31109	NW16KF	43	3	M6
V31109	NW25KF	53	4	M6
V31109	NW40KF	68	4	M6
V31109	NW50KF	88	6	M6

Al

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Center ring or centering ring with seal

Number	Size	A	B	C	D	O-ring
V31110	NW10KF	10	12	8	3.9	nitril
V31111	NW16KF	16	17	8	3.9	nitril
V31113	NW25KF	25	26	8	3.9	nitril
V31115	NW40KF	40	41	8	3.9	nitril
V31116	NW50KF	50	52	8	3.9	nitril
V31117	NW10KF	10	12	8	3.9	viton®*
V31118	NW16KF	16	17	8	3.9	viton®*
V31120	NW25KF	25	26	8	3.9	viton®*
V31122	NW40KF	40	41	8	3.9	viton®*
V31123	NW50KF	50	52	8	3.9	viton®*

Stainless Steel. Nitril or viton®*.

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Meshed  center ring with seal

Number	Size	A	B	C	O-ring
A20248	NW16KF	9.5	17	3.9	viton®*
A20249	NW25KF	19	26	3.9	viton®*
	NW40KF	32	41	3.9	viton®*

Stainless Steel.

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Centrerring SS, adapting

Number	Size	A	B	C	D	E	F	O-ring
A31110	NW10/16KF	10	12	16	17	8	3.9	nitril
A31111	NW20/25KF	20	22	25	26	8	3.9	nitril
A31112	NW32/40KF	32	34	40	41	8	3.9	nitril
A31113	NW10/16KF	10	12	16	17	8	3.9	viton®*
A31114	NW20/25KF	20	22	25	26	8	3.9	viton®*
A31115	NW32/40KF	32	34	40	41	8	3.9	viton®*

Stainless Steel. 

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Centering ring with outer ring stainless steel 316, O-ring viton®* and outside ring Al.

Number	Size	A	B	C
U31110-316	NW10/16KF	16	32.5	8
U31111-316	NW20/25KF	25	42.5	8
U31112-316	NW32/40KF	40	57.5	8
U31113-316	NW50KF	50	77.5	8

Stainless Steel.

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Vacuum KF-flange protection cap

Number	Size
100080	NW10/16KF
100081	NW20/25KF
100082	NW32/40KF
100083	NW50KF

Polyethylene

Reductions, adaptors and hoses

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KF/KF-reduction

Number	Size	A	B	C
L31180	NW25/16KF	40	30	40
L31181	NW40/16KF	55	30	40
L31182	NW40/25KF	55	40	40
L31183	NW50/16KF	75	30	40
L31184	NW50/25KF	75	40	40
L31185	NW50/40KF	75	55	40

Stainless Steel.

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ISO/KF-reduction

Number	Size	A	B	C	D
L31189	NW63/25/ISO/KF	95	40	42	25.4
L31190	NW63/40/ISO/KF	95	55	42	38.1
L31191	NW63/50/ISO/KF	95	75	42	50.8
L31197	ISO100/40KF	130	55	42	38.1
L31198	ISO100/50KF	130	75	42	50.8

Stainless Steel.

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Reductions CF/KF

Number	Size	AA	B	C	D
	16CF/16KF	33.8	30	43	19.05
	35CF/16KF	69.5	30	45.3	19.05
	35CF/25KF	69.5	40	45.3	25.4
	35CF/40KF	69.5	55	45.3	38.1
	63CF/50KF	113.6	75	49.5	50.8

Stainless Steel.

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KF-male-pipe-adaptor

Number	Size	A	B	C	D	Thread
L31300	NW16KF	30	35	4.7	10	1/8"PT
L31301	NW16KF	30	35	7.1	14	1/4"PT
L31304	NW25KF	40	35	4.7	10	1/8"PT
L31305	NW25KF	40	35	7.1	14	1/4"PT
L31307	NW25KF	40	40	11.9	22	1/2"PT
L31308	NW25KF	40	40	15.9	27	3/4"PT
L31310	NW40KF	55	35	7.1	14	1/4"PT
L31312	NW40KF	55	40	11.9	22	1/2"PT
L31313	NW40KF	55	40	15.9	27	3/4"PT
L31314	NW40KF	55	45	22.2	36	1"PT
L31318	NW50KF	75	35	7.1	14	1/4"PT
L31319	NW50KF	75	40	11.9	22	1/2"PT
L31320	NW50KF	75	40	15.9	27	3/4"PT
L31321	NW50KF	75	45	22.2	36	1"PT
L31240	NW16KF	30	35	4.7	10	1/8"NPT
L31241	NW16KF	30	35	7.1	14	1/4"NPT
L31243	NW25KF	40	35	4.7	10	1/8"NPT
L31244	NW25KF	40	35	7.1	14	1/4"NPT
L31246	NW25KF	40	40	11.9	22	1/2"NPT
L31249	NW25KF	40	40	15.9	27	3/4"NPT
L31248	NW40KF	55	35	7.1	14	1/4"NPT
L31250	NW40KF	55	40	11.9	22	1/2"NPT
L31251	NW40KF	55	40	15.9	27	3/4"NPT
	NW40KF	55	45	22.2	36	1"NPT
L31255	NW50KF	75	35	7.1	14	1/4"NPT
L31256	NW50KF	75	40	11.9	22	1/2"NPT
L31252	NW50KF	75	40	15.9	27	3/4"NPT
	NW50KF	75	45	22.2	36	1"NPT

Stainless Steel.

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KF-female-pipe-adaptor

Number	Size	A	B	C	Thread
L31220	NW16KF	19.05	25	17	1/8"PT
L31221	NW16KF	19.05	25	17	1/4"PT
L31223	NW25KF	25.4	25	19	1/8"PT
L31224	NW25KF	25.4	25	19	1/4"PT
L31227	NW40KF	38.1	25	32	1/8"PT
L31228	NW40KF	38.1	25	32	1/4"PT
L31230	NW50KF	50.8	25	46	1/8"PT
L31231	NW50KF	50.8	25	46	1/4"PT
L31257	NW16KF	19.05	25	17	1/8"NPT
L31258	NW16KF	19.05	25	17	1/4"NPT
L31260	NW25KF	25.4	25	19	1/8"NPT
L31261	NW25KF	25.4	25	19	1/4"NPT
L31263	NW40KF	38.1	25	32	1/8"NPT
L31264	NW40KF	38.1	25	32	1/4"NPT
L31266	NW50KF	50.8	25	46	1/8"NPT
L31267	NW50KF	50.8	25	46	1/4"NPT

Stainless Steel.

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KF-quick-disconnect-adaptor

Number	Size	A	B	C	Tube Size
L31282	NW16KF	6.5	33.4	30	1/4"
L31283	NW16KF	13	36.5	30	1/2"
L31284	NW16KF	19.3	44.5	30	3/4"
L31285	NW25KF	13	36.5	40	1/2"
L31286	NW25KF	19.3	44.5	40	3/4"
L31287	NW25KF	25.7	50.8	40	1"
L31288	NW40KF	13	36.5	55	1/2"
L31289	NW40KF	19.3	44.5	55	3/4"
L31290	NW40KF	25.7	50.8	55	1"
L31291	NW40KF	38.4	60.3	55	1 1/2"
	NW50KF	38.4	60.3	75	1 1/2"
	NW50KF	51	60.3	75	2"

Stainless Steel. 

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KF/Hose adapter

Number	Size	A	B
L31150	NW16KF	10	40
L31151	NW25KF	10	40
L31152	NW40KF	10	40
L31153	NW50KF	10	40
L31160	NW16KF	12	40
L31161	NW25KF	12	40
L31162	NW40KF	12	40
L31163	NW50KF	12	40
L31170	NW25KF	20	40
L31171	NW40KF	20	40
L31172	NW50KF	20	40

Stainless Steel.

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KF/Hose adapter

Number	Size	A	B
L31175	NW16KF	19.1	40
L31176	NW25KF	22.2	40
L31177	NW40KF	41.3	40
L31178	NW50KF	47.7	40

Stainless Steel.

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Vacuum hose

Number	Inner diameter mm
S31130	8
S31131	12
S31132	16
S31133	19
S31134	22
S31135	25
S31136	32
S31137	38
S31138	40
S31139	50

Thick-walled PVC with steel thread inside wall

L-, T-, X-Pieces, Metal bellows

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L-Piece

Number	Size	A	B	C	R
V31130	NW16KF	40	19.05	30	28.6
V31131	NW25KF	50	25.4	40	38.1
V31133	NW40KF	65	38.1	55	57.2
V31135	NW50KF	80	50.8	75	76.2

Stainless Steel.

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T-Piece

Number	Size	A	B	C	D
V31140	NW16KF	40	19.05	30	80
V31141	NW25KF	50	25.4	40	100
V31143	NW40KF	65	38.1	55	130
V31145	NW50KF	70	50.8	75	140

Stainless Steel.

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T-piece unequal

Number	Size	A	B	C	D	E	F
V31142	NW25/25/16KF	50	40	40	30	25.4	19.05
V31144	NW40/40/25KF	65	50	55	40	38.1	25.4

Stainless Steel.

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X-Piece

Number	Size	A	B	C	D
V31150	NW16KF	40	19.05	30	80
V31151	NW25KF	50	25.4	40	100
V31152	NW40KF	65	38.1	55	130
V31154	NW50KF	70	50.8	75	140

Stainless Steel.

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KF Compressible bellows

Number	Size	A	B	C
V31160	NW16KF	30	100	80
V31161	NW25KF	40	100	80
V31162	NW40KF	55	100	80
V31163	NW50KF	75	100	80

Stainless Steel. 

 

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KF Metal hoses

Number	Size	A	B
V31165	NW16KF	30	250
V31166	NW25KF	40	250
V31167	NW40KF	55	250
V31168	NW50KF	75	250
V31170	NW16KF	30	500
V31171	NW25KF	40	500
V31172	NW40KF	55	500
V31173	NW50KF	75	500
V31174	NW16KF	30	1000
V31175	NW25KF	40	1000
V31176	NW40KF	55	1000
V31177	NW50KF	75	1000
	NW16KF	30	2000
	NW25KF	40	2000

Stainless Steel.

*Viton® is a registered trademark of DuPont Performance Elastomers.