KF Vacuum Fittings And Flanges

Wellgreen offers a complete line of vacuum KF fittings and flanges. Different from CF vacuum fittings / flanges  and ISO vacuum flange and fittings. The tube portions are fabricated from 304 or 316L or other high quality stainless steels. Our elbows, and all tees and crosses are made with the pull port technique. This allows smooth, crevice-free butt welds to provide the maximum in cleanliness for UHV applications. Bakeout range is up to 200°C. Standard finish is bead blasted.

  • Flanges
  • Nipples
  • Elbows
  • Tees
  • Crosses
  • Clamps and Seals

Features:

  • 1. Flanges are designed according to ISO2861 specification and can be changed upon request.
  • 2. Flange sizes are from NW10 to NW50
  • 3. Vacuum Range: >=10-8 Torr
  • 4. Standard materials are 304 and 316L stainless steel.
  • 5. Tube sizes are from 1/2″ to 2″
  • 6. The system can afford up to Fahrenheit 400( Celsius 200). However, sustained baking above Fahrenheit 302 ( Celsius 150) may result in deterioration of the O-ring.
  • 7. KF products are supplied with a machining finish. Other finishes are also available.
  • 8. Flanges and seals are reusable.
  • 9. No tools for assembly or disassembly.
  • 10. KF flanges are 100% tested before shipping.
  • 11. Seal Temperature Range:
    • Fluorocarbon FKM (Viton): Celsius -5 to 204( Fahrenheit 23 to 399)
    • Silicon: Celsius -50 to 180( Fahrenheit -58 to 356)
    • Buna-N (NBR): Celsius -25 to 121( Fahrenheit -13 to 250)

Applications:

    • 1. High Vacuum
    • 2. Roughing line
    • 3. Vacuum systems, which require cleaning and modified frequently.
    • 4. Experimental system in research laboratories

kf-part1

1.WING NUT
2.SPRING WASHER
3.EYE BOLT
4.WELD FLANGE
5.CLAMP
6.O-RING
7.CENTER RING

kf-part2

1.SPRING WASHER
2.WING NUT
3.EYE BOLT
4.CLAMP
5.O-RING
6.CENTER RING
7.WELD FLANGE


Short Weld

Short Weld

Flange
Size

Tube
Size

Dimensions, in. (mm)

C

E

NW10

1/2″

0.50″ (12.7)

0.37″ (9.4)

NW16

3/4″

0.50″ (12.7)

0.62″ (15.7)

NW25

1″

0.50″ (12.7)

0.87″ (22.1)

NW40

1 1/2″

0.75″ (19.1)

1.37″ (34.8)

NW50

2″

0.75″ (19.1)

1.87″ (47.5)


Blank Flange

Blank Flange

Flange
Size

Tube
Size

Dimensions, in. (mm)

C

D

NW10

1/2″

0.20″ (5.0)

1.18″ (30.0)

NW16

3/4″

0.20″ (5.0)

1.18″ (30.0)

NW25

1″

0.20″ (5.0)

1.57″ (40.0)

NW40

1 1/2″

0.20″ (5.0)

2.17″ (55.0)

NW50

2″

0.20″ (5.0)

2.95″ (75.0)


Half Nipples

kf-half-nipples

Flange
Size

Tube
Size

Dimensions, in. (mm)

C

E

NW10

1/2″

1.25″ (31.8)

0.37″ (9.4)

NW16

3/4″

1.15″ (29.2)

0.62″ (15.7)

NW25

1″

2.03″ (51.6)

0.87″ (22.1)

NW40

1 1/2″

2.40″ (61.0)

1.37″ (34.8)

NW50

2″

3.15″ (80.0)

1.87″ (47.5)


Reducing

Reducing

Flange
Size

Tube
Size

C, in. (mm)

NW25×NW16

3/4″

1.30″ (33.0)

NW40×NW16

3/4″

1.30″ (33.0)

NW40×NW25

1″

2.18″ (55.4)

NW50×NW16

3/4″

1.30″ (33.0)

NW50×NW25

1 1/2″

2.18″ (55.4)

NW50×NW40

2″

2.55″ (64.8)


90 Degree Elbow
90 Degree Elbow

Flange
Size

Tube
Size

A, in. (mm)

NW10

1/2″

1.25″ (31.8)

NW16

3/4″

1.15″ (29.2)

NW25

1″

1.65″ (41.9)

NW40

1 1/2″

2.40″ (61.0)

NW50

2″

3.15″ (80.0)


Equal Tee

Equal Tee

Flange
Size

Tube
Size

A, in. (mm)

NW10

1/2″

1.25″ (31.8)

NW16

3/4″

1.15″ (29.2)

NW25

1″

2.03″ (51.6)

NW40

1 1/2″

2.40″ (61.0)

NW50

2″

3.15″ (80.0)


KF Clamp

KF Clamp

Flange
Size

Tube Size

Dimensions, in. (mm)

A

B

C

NW10/NW16

1/2″ or 3/4″

1.69″ (42.9)

2.47″ (62.8)

0.63″ (16.0)

NW25

1″

2.17″ (55.1)

2.82″ (71.6)

0.63″ (16.0)

NW40

1 1/2″

2.76″ (70.1)

3.54″ (89.8)

0.63″ (16.0)

NW50

2″

3.70″ (94.0)

4.43″ (112.5)

0.79″ (20.1)


*For more information of kf fittings and flanges, please feel free to contact us.


If you would like a quotation or further information on this product, please fill in the form below and we will reply to you within 1 working day.

Your Name (required)

Your Phone (required)

Your Email (required)

Subject

Your Message