KF Flanges

KF Flanges

They are compatible with other manufacturers’ ISO-KF style flanges. KF flanges utilize an aluminum clamp with a single wingnut fastener or a lock-over-center clamp allowing frequent disassembly without tools. The vacuum seal is effected by the application of uniform pressure from the clamp on the 15° surface of the 304 stainless steel flanges.

The mating flange surfaces compress a Viton O-ring held in place by a centering ring. The resultant seal can be used in vacuum applications of up to 10-8 Torr and baked to 204°C, however, sustained baking above 150°C may result in deterioration of O-rings.

KF flanges allow components to be rotated before assembly for ease of components and fittings. KF flanges are available on virtually all Ebara components and fittings. Ebara manufactures a full line of KF adapters so you can add to or build an entire system with KF components. KF flanges can also be used with EVAC chain clamps and aluminum seals to obtain a UHV seal bakeable to to 150°C….

Specifications

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KF Bored Blank Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

Other Product Images

Additional Information

More Info

MODEL NUMBER DIAGRAM TUBE OD A B C
KF-10B-038 A 3/8 0.380 0.326 1.180
KF-10B-050 A 1/2 0.510 0.451 1.180
KF-16B-038 A 3/8 0.380 0.326 1.180
KF-16B-050 A 1/2 0.510 0.451 1.180
KF-16B-075 B 3/4 0.760 0.680 1.180
KF-25B-038 A 3/8 0.380 0.326 1.575
KF-25B-050 A 1/2 0.510 0.451 1.575
KF-25B-075 A 3/4 0.760 0.680 1.575
KF-25B-100 A 1 1.010 0.938 1.575
KF-40B-038 A 3/8 0.380 0.326 2.160
KF-40B-050 A 1/2 0.510 0.451 2.160
KF-40B-075 A 3/4 0.760 0.680 2.160
KF-40B-100 A 1 1.010 0.938 2.160
KF-40B-150 A 1-1/2 1.510 1.438 2.160
KF-50B-038 A 3/8 0.380 0.326 2.950
KF-50B-050 A 1/2 0.510 0.451 2.950
KF-50B-075 A 3/4 0.760 0.680 2.950
KF-50B-100 A 1 1.010 0.938 2.950
KF-50B-150 A 1-1/2 1.510 1.438 2.950
KF-50B-200 A 2 2.010 1.938 2.950
 

KF Socket Weld Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

Other Product Images

Additional Information

MODEL NUMBER DIAGRAM TUBE OD A B C
KF-10B-038 A 3/8 0.380 0.326 1.180
KF-10B-050 A 1/2 0.510 0.451 1.180
KF-16B-038 A 3/8 0.380 0.326 1.180
KF-16B-050 A 1/2 0.510 0.451 1.180
KF-16B-075 B 3/4 0.760 0.680 1.180
KF-25B-038 A 3/8 0.380 0.326 1.575
KF-25B-050 A 1/2 0.510 0.451 1.575
KF-25B-075 A 3/4 0.760 0.680 1.575
KF-25B-100 A 1 1.010 0.938 1.575
KF-40B-038 A 3/8 0.380 0.326 2.160
KF-40B-050 A 1/2 0.510 0.451 2.160
KF-40B-075 A 3/4 0.760 0.680 2.160
KF-40B-100 A 1 1.010 0.938 2.160
KF-40B-150 A 1-1/2 1.510 1.438 2.160
KF-50B-038 A 3/8 0.380 0.326 2.950
KF-50B-050 A 1/2 0.510 0.451 2.950
KF-50B-075 A 3/4 0.760 0.680 2.950
KF-50B-100 A 1 1.010 0.938 2.950
KF-50B-150 A 1-1/2 1.510 1.438 2.950
KF-50B-200 A 2 2.010 1.938 2.950

KF Long Weld Neck Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

KF Short Weld Neck Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

Other Product Images

Additional Information

MODEL NUMBER DIAGRAM TUBE
OD
A B C D E
KF-10F A 1/2 1.180 0.480 0.380 1/2 0.500
KF-16F B 3/4 1.180 0.680 0.625 3/4 0.560
KF-16FB A 3/4 1.180 0.680 0.625 3/4 0.500
KF-25F A 1 1.575 1.031 0.870 1 0.500
KF-40F A 1-1/2 2.160 1.620 1.370 11/2 0.750
KF-50F A 2 2.950 2.060 1.870 2 0.750

KF 316L Stainless Steel Long Neck Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

Other Product Images

Additional Information

MODEL NUMBER A B C D
KF-25FL-316L 1.575 1.031 0.870 1
KF-40FL-316L 2.160 1.620 1.370 1-1/2
KF-50FL-316L 2.950 2.060 1.870 2
 

KF 316L Stainless Steel Bored Blank Flanges

Tube OD sizes: 3/8 to 2 inches
Materials
   Flange: 304 or 316L stainless steel
   O-rings: Viton, Buna & silicone
Fittings
   Tube finishes: Beadblast standard
      (Tumbled & electropolish available)
Fasteners: Wingnut, SureSeal, bulkhead & EVAC clamps 
Vacuum range
   Elastomer seal: >= 1 x 10-8 Torr - High vacuum
   EVAC metal seal: >= 1 x 10-11 Torr - UHV
Vacuum range: >= 1 x 10-11 Torr - UHV
Temperature range: 
   Viton: -20°C to 200°C 
   Silicone: -50°C to 230°C 
   Buna: -30°C to 110°C 
   EVAC metal seal: -270°C to 150°C

Other Product Images

Additional Information

MODEL NUMBER DIAGRAM TUBE OD A B C
KF-25B-100-316L A 1 1.010 0.938 1.575
KF-40B-150-316L A 1-1/2 1.510 1.438 2.160
KF-50B-200-316L A 2 2.010 1.938 2.950