Vacuum adaptors, flanges, hoses & fittings
EM-Tec standard KF vacuum flange hardware components and parts are directly compatible with all KF, NW or QF vacuum flange hardware connections.
Interchangeable designations for these standard rough and medium vacuum flange connections are:
KF, DN-KF, ISO-KF, NW, ISO-NW, QF and DN.
Standard sizes offered are:
DN10KF (adapts to DN16KF), DN16KF, DN25KF, DN40KF and DN50KF
Most components are offered in stainless steel, however, for adaptors vacuum grade aluminium alloys are sometimes preferred. Standard KF vacuum flanges are extensively used to connect vacuum components on a range of vacuum systems, including coaters, electron microscopes, vacuum ovens, vacuum pumps, vacuum gauges etc.
Dimensions of DN-KF flanges
 |
Dimensions (mm) |
DN10KF |
DN16KF |
DN25KF |
DN40KF |
DN50KF |
| Flange OD ØA | 30 | 30 | 40 | 55 | 75 | |
| Centering seal ØB | 12.2 | 17.2 | 26.2 | 41.2 | 52.4 | |
| Vacuum line ID ØC | 10 | 16 | 24 | 40.5 | 51 | |
| Vacuum line OD ØD | 14 | 20 | 28 | 44.5 | 57 |
We offer:
- EM-Tec KF flange adaptors with 1/8” female NPT thread. Made from vacuum grade aluminium for connecting components such as vacuum gauges, small valves and NPT connectors with 1/8” male NPT thread
- EM-Tec KF flange adaptors with 1/8” female NPT thread. Made from vacuum grade AISI 304 stainless steel
- EM-Tec KF flange adaptors with 1/4” female NPT thread and with 1/4” male NPT thread
- EM-Tec KF vacuum flange centering seals. Consisting of a stainless-steel centering ring and a Viton O-ring. They are placed between the KF flanges and seal when the flanges are pushed together by wing nut clamps
- EM-Tec KF vacuum flange centering seals with centering ring and Viton O-ring. Available with stainless steel 304 centering ring and aluminium centering ring
- EM-Tec replacement O-rings for worn or damaged centering seals. O-rings are made from NBR (Nitrile) and are slightly softer than the Viton seals to provide a secure seal in vacuum lines. Sold in packages of 10
- EM-Tec quick-release hinged clamps which are placed around the KF vacuum flanges. By turning the wing nut, the hinged clamp closes and seals the O-ring on the KF vacuum flanges. Made from aluminium with stainless steel pins, bolt and wing nut
- For KF/NW stainless steel in-line and 3-way ball valves see: this link
- For ISO vacuum connection parts see: this link
Vacuum hoses
EM-Tec Flextube clear, wire reinforced thick wall PVC vacuum hose
EM-Tec Flextube is a clear, wire-reinforced thick wall PVC vacuum for making flexible and custom vacuum hoses. Made from corrosion resistant clear thick wall PVC with embedded zinc plated spring steel wire. This flexible yet strong hose allows for relatively sharp bends and will not collapse under vacuum. Outside and inside of the PVC vacuum hoses are smooth. The smallest bending radius is approximately 3.5 times the outside diameter. To prevent vacuum leaks, use hose clamps to tighten the PVC vacuum hose on the vacuum hose adaptors. Current choice includes: 16mm and 25mm ID PVC vacuum hoses. Available in lengths up to 10 metres.
EM-Tec DN-KF Flextube PVC vacuum hoses
The ready to use EM-Tec DN-KF Flextube vacuum hoses are made from EM-Tec Flextube clear, wire reinforced PVC hose with KF hose adaptors on each end. They are available with KF16 and KF25 flanges with lengths from 0.5 to 5 metres.
Ordering information:
For quick navigation:
Vacuum clamps and centering o-rings
Vacuum reducers
Vacuum elbows
Vacuum vent valves
Vacuum hoses
Vacuum hose adaptors
Vacuum hose clamps
For KF/NW stainless steel in-line and 3-way ball valves see: this link
Vacuum adaptors
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DN40KF adaptor to 1/8inch NPT female thread – aluminium
DN40KF adaptor to 1/8inch NPT female thread – aluminium (each)
£23.57 Add to basket -
DN40KF adaptor to 1/4inch NPT female thread – aluminium
DN40KF adaptor to 1/4inch NPT female thread – aluminium (each)
£30.09 Add to basket -
DN16KF adaptor to 1/8inch NPT female thread – 304 S/S
DN16KF adaptor to 1/8inch NPT female thread – 304 stainless steel (each)
£26.83 Add to basket -
DN25KF adaptor to 1/8inch NPT female thread – 304 S/S
DN25KF adaptor to 1/8inch NPT female thread – 304 stainless steel (each)
£28.59 Add to basket -
DN40KF adaptor to 1/8inch NPT female thread – 304 S/S
DN40KF adaptor to 1/8inch NPT female thread – 304 stainless steel (each)
£35.11 Add to basket -
DN16KF adaptor to 1/4 inch NPT female thread – 304 stainless steel
DN16KF adaptor to 1/4 inch NPT female thread – 304 stainless steel (each)
£28.84 Add to basket -
DN25KF adaptor to 1/4 inch NPT female thread – 304 stainless steel
DN25KF adaptor to 1/4 inch NPT female thread – 304 stainless steel (each)
£32.60 Add to basket -
EM-Tec DN16KF equal T connector – L = 80mm
EM-Tec DN16KF equal T connector, L = 80mm – H = 42 mm – 304 stainless steel (each)
£29.59 Add to basket -
EM-Tec DN25KF equal T connector – L = 100mm
EM-Tec DN25KF equal T connector, L = 100mm – H = 55 mm – 304 stainless steel (each)
£36.61 Add to basket -
DN40KF adapter to 1/4 inch NPT female thread, 304 stainless steel
DN40KF adapter to 1/4 inch NPT female thread, 304 stainless steel (each)
£38.62 Add to basket -
EM-Tec DN16KF adaptor to ISO metric M14
EM-Tec DN16KF adaptor to ISO metric M14 x 1.5mm female thread- 304 stainless steel (each)
£31.60 Add to basket -
EM-Tec DN16KF adaptor to ISO metric M20
EM-Tec DN16KF adaptor to ISO metric M20 x 1.5mm female thread- 304 stainless steel (each)
£31.60 Add to basket -
EM-Tec DN25KF adaptor to ISO metric M20
EM-Tec DN25KF adaptor to ISO metric M20 x 1.5mm female thread- 304 stainless steel (each)
£35.61 Add to basket -
EM-Tec DN16KF adaptor to 1/2inch BSPT female thread
EM-Tec DN16KF adaptor to 1/2inch BSPT female thread- 304 stainless steel (each)
£14.51 Add to basket -
EM-Tec DN25KF adaptor to ISO metric M14
EM-Tec DN25KF adaptor to ISO metric M14 x 1.5mm female thread- 304 stainless steel (each)
£35.61 Add to basket -
EM-Tec DN25KF adaptor to 1 inch BSPT female thread
EM-Tec DN25KF adaptor to 1 inch BSPT female thread- 304 stainless steel (each)
£17.32 Add to basket -
EM-Tec DN16KF adaptor to ISO metric M14
EM-Tec DN16KF adaptor to ISO metric M14 x 1.5mm male thread- 304 stainless steel (each)
£36.61 Add to basket -
EM-Tec DN16KF adaptor to ISO metric M20
EM-Tec DN16KF adaptor to ISO metric M20 x 1.5mm male thread- 304 stainless steel (each)
£36.61 Add to basket -
EM-Tec DN25KF adaptor to ISO metric M14
EM-Tec DN25KF adaptor to ISO metric M14 x 1.5mm male thread- 304 stainless steel (each)
£39.87 Add to basket -
EM-Tec DN25KF adaptor to ISO metric M20
EM-Tec DN25KF adaptor to ISO metric M20 x 1.5mm male thread- 304 stainless steel (each)
£39.87 Add to basket -
EM-Tec DN16KF adaptor to 1/2 inch BSPT
EM-Tec DN16KF adaptor to 1/2 inch BSPT male thread – 304 stainless steel (each)
£19.56 Add to basket -
EM-Tec DN25KF adaptor to 1 inch BSPT
EM-Tec DN25KF adaptor to 1 inch BSPT male thread – 304 stainless steel (each)
£19.56 Add to basket -
DN16KF straight through tube
EM-Tec DN16KF straight through tube, L = 100 mm, 304 stainless steel (each)
£25.30 Add to basket -
DN25KF straight through tube
EM-Tec DN25KF straight through tube, L = 100 mm, 304 stainless steel (each)
£31.26 Add to basket -
1/8i nch NPT male/male thread adaptor, 304 stainless steel
1/8i nch NPT male/male thread adapter, 304 stainless steel (each)
£27.01 Add to basket -
1/4 inch NPT male/male thread adaptor, 304 stainless steel
1/4 inch NPT male/male thread adapter, 304 stainless steel (each)
£8.74 Add to basket
Blanking flanges
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DN16KF blank flange – 304 stainless steel
DN16KF blank flange – 304 stainless steel (each)
£5.27 Add to basket -
DN25KF blank flange – 304 stainless steel
DN25KF blank flange – 304 stainless steel (each)
£5.47 Add to basket -
DN40KF blank flange – 304 stainless steel
DN40KF blank flange – 304 stainless steel (each)
£6.77 Add to basket -
DN50KF blank flange – 304 stainless steel
DN50KF blank flange- 304 stainless steel (each)
£10.48 Add to basket
Vacuum clamps and centering o-rings
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DN16KF seal with aluminium centering ring with Viton O-ring
DN16KF seal with aluminium centering ring with Viton O-ring (each)
£3.15 Add to basket -
DN25KF seal with aluminium centering ring with Viton O-ring
DN25KF seal with aluminium centering ring with Viton O-ring (each)
£3.45 Add to basket -
DN16KF replacement O-ring for KF16 centering ring – NBR
DN16KF replacement O-ring for KF16 centering ring- NBR (pkg/10)
£4.70 Add to basket -
DN25KF replacement O-ring for KF25 centering ring – NBR
DN25KF replacement O-ring for KF25 centering ring – NBR (pkg/10)
£5.18 Add to basket -
DN40KF replacement O-ring for KF40 centering ring – NBR
DN40KF replacement O-ring for KF40 centering ring – NBR (pkg/10)
£6.12 Add to basket -
DN50KF replacement O-ring for KF50 centering ring – NBR
DN50KF replacement O-ring for KF50 centering ring – NBR (pkg/10)
£6.99 Add to basket -
DN25KF quick release hinged wing nut clamp- aluminium
DN25KF quick release hinged wing nut clamp – aluminium (each)
£8.02 Add to basket -
DN16KF quick release hinged wing nut clamp- aluminium
DN16KF quick release hinged wing nut clamp – aluminium (each)
£8.02 Add to basket -
DN40KF quick release hinged wing nut clamp- aluminium
DN40KF quick release hinged wing nut clamp – aluminium (each)
£8.02 Add to basket -
DN50KF quick release hinged wing nut clamp- aluminium
DN50KF quick release hinged wing nut clamp – aluminium (each)
£9.03 Add to basket -
DN25KF seal with centering ring with Viton O-ring
DN25KF seal with 304 stainless steel centering ring with Viton O-ring (each)
£8.48 Add to basket -
DN16KF seal with centering ring with Viton O-ring
DN16KF seal with 304 stainless steel centering ring with Viton O-ring (each)
£6.77 Add to basket -
DN40KF seal with centering ring with Viton O-ring
DN40KF seal with 304 stainless steel centering ring with Viton O-ring (each)
£10.03 Add to basket -
DN10/16KF adaptive seal with centering ring with O-ring
DN10/16KF adaptive seal from KF10 to KF16 with 304 stainless steel centering ring with Viton O-ring (each)
£10.03 Add to basket -
DN50KF seal with centering ring with Viton O-ring
DN50KF seal with 304 stainless steel centering ring with Viton O-ring (each)
£11.94 Add to basket -
EM-Tec DN16KF centering ring with screen plate – 0.4mm holes
EM-Tec DN16KF centering ring with screen plate 0.4mm holes, 28 mesh – 304 stainless steel and Viton O-ring (each)
£11.54 Add to basket -
EM-Tec DN25KF centering ring with screen plate – 0.4mm holes
EM-Tec DN25KF centering ring with screen plate 0.4mm holes, 28 mesh – 304 stainless steel and Viton O-ring (each)
£12.94 Add to basket -
DN50KF seal with aluminium centering ring with NBR O-ring
EM-Tec DN50KF seal with aluminium centering ring with NBR O-ring (each)
£5.25 Add to basket
Vacuum reducers
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Conical vacuum reducer, DN25KF to DN16KF, 304 S/S – 40mm long
EM-Tec conical vacuum reducer from DN25KF to DN16KF, 304 stainless – 40mm long (each)
£24.58 Add to basket -
Conical vacuum reducer, DN40KF to DN16KF, 304 S/S – 40mm long
EM-Tec conical vacuum reducer from DN40KF to DN16KF, 304 stainless – 40mm long (each)
£36.61 Add to basket -
Conical vacuum reducer, DN40KF to DN25KF, 304 S/S – 40mm long
EM-Tec conical vacuum reducer from DN40KF to DN25KF , 304 stainles s- 40mm long (each)
£37.62 Add to basket
Vacuum elbows
Vacuum vent valves
Vacuum hoses
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Silicone hose Ø6 x Ø12mm, thick-walled, clear – 1m length
Silicone hose Ø6 x Ø12mm, thick-walle, clear – 1m length
£8.60 Add to basket -
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 2m length
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 2m length
£16.16 Add to basket -
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 3m length
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 3m length
£22.43 Add to basket -
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 4m length
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 4m length
£28.97 Add to basket -
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 5m length
Silicone hose Ø6 x Ø12mm, thick-walled, clear – 5m length
£35.04 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23 mm – (1m length)
£6.07 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23mm – (2m length)
£6.07 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23mm – (1m length)
£18.22 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23 mm – (4m lenth)
£24.30 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23 mm – (5m length)
£30.37 Add to basket -
EM-Tec Flextube 16 thick-walled clear PVC vacuum hose
EM-Tec Flextube 16 thick-walled clear PVC wire reinforced vacuum hose, diameter 16 x diameter 23 mm – (10m length)
£57.97 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25 x diameter 33mm – (1m length))
£8.38 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25 x diameter 33mm – (2m length)
£16.76 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25 x diameter 33 mm (3m length)
£25.13 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25 x diameter 33 mm (4m length))
£33.51 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25 x diameter 33 mm (5m length)
£41.90 Add to basket -
EM-Tec Flextube 25 thick-walled clear PVC vacuum hose
EM-Tec Flextube 25 thick-walled clear PVC wire reinforced vacuum hose, diameter 25mm x diameter 33 mm (10m length)
£80.17 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 0.5m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 0.5 m length
£39.62 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 1m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 1 m length
£42.63 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 2m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 2m length
£43.13 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 3m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 3 m length
£53.67 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 4m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 4m length
£59.69 Add to basket -
EM-Tec Flextube DN16KF clear PVC vacuum hose – 5m length
EM-Tec Flextube DN16KF clear PVC vacuum hose with stainless steel KF16 hose adaptors – 5m length
£64.70 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 0.5m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 0.5 mtr length (0.5 meter)
£40.12 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 1m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 1 mtr length (1 meter)
£45.14 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 2m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 2 mtr length (2 meter)
£53.17 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 3m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 3 mtr length (3 meter)
£62.19 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 4m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 4 mtr length (4 meter)
£70.22 Add to basket -
EM-Tec Flextube DN25KF clear PVC vacuum hose – 5m length
EM-Tec Flextube DN25KF clear PVC vacuum hose with stainless steel KF25 hose adaptors- 5 mtr length (5 meter)
£75.23 Add to basket
Vacuum hose adaptors
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DN16KF hose adaptor for 6mm ID hose – L=35mm
DN16KF hose adaptor for 6mm ID hose, L = 35mm – 304 stainless steel (each)
£10.53 Add to basket -
DN16KF hose adaptor for 16mm ID hose – L=35mm – 304 stainless steel
DN16KF hose adaptor for 16mm ID hose, L= 35mm – 304 stainless steel (each)
£12.54 Add to basket -
DN25KF hose adaptor for 6mm ID hose – 304 stainless steel
DN25KF hose adaptor for 6mm ID hose – 304 stainless steel (each)
£12.54 Add to basket -
DN25KF hose adaptor for 25mm ID hose- L=35mm- 304 stainless steel
DN25KF hose adaptor for 25mm ID hose, L=35mm- 304 stainless steel (each)
£14.80 Add to basket
Vacuum hose clamps
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Hose clamp for 12mm hose – stainless steel
Hose clamp for 12mm hose – stainless steel (set/2)
£2.82 Add to basket -
Hose clamp for 12mm OD hose
Hose clamp for 12mm OD hose used on 6mm vacuum hose adaptors- stainless steel (pkg/2)
£2.87 Add to basket -
Hose clamp for 23mm OD hose
Hose clamp for 23mm OD hose used on 16mm vacuum hose adaptors – stainless steel (pkg/2)
£3.76 Add to basket -
Hose clamp for 33mm OD hose
Hose clamp for 33mm OD hose used on 25mm vacuum hose adaptors – stainless steel (pkg/2)
£4.66 Add to basket