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TriMetl Flanges and Transitions



Reliable Sealing Solutions for Aluminum Chambers and Equipment

[TriMetal Flanges]

Description

TriMetl transitions are used to provide the reliable all-metal seal of the standard stainless steel CF flange on aluminum vacuum chambers.

Explosively-bonded material. TriMetl is an explosively-bonded material made up of three metals. Aluminum and stainless steel are joined together with an interlayer of tantalum. From this material, transitions are made for integrating stainless steel and aluminum components on vacuum systems.

Easy to weld. Thermionics’ new TriMetl transition tubes are easier to weld because the tantalum interlayer has a higher melting point than TriBond's copper/titanium interlayer.

Better value. TriMetl aluminum-to-stainless steel transition tubes are a better value than buying flanges made of the same explosively-bonded material.

TriMetl transitions and half nipples eliminate the risk of leaks associated with using aluminum-to-aluminum or aluminum-to-stainless steel flange assemblies on aluminum chambers.

[TBF-275-150/N]

TriMetl CF Half Nipples

The TriMetl CF half nipple is a tri-metal tube attached to a standard stainless steel CF flange. The aluminum end is ready to be welded directly to an aluminum chamber. The stainless steel flange end is ready to be mated to another standard stainless steel CF flange.


UHV Certified

Prior to machining the transitions, the TriMetl material must pass the following tests:

  • Ultrasonic
  • Dye-penetrant
  • Chisel
  • Bend
  • Ram tensile

Each TriMetl transition is thermally cycled to over 300°C, then helium leak-tested to a sensitivity of 5 x 10-10 std cc He/sec.

 

TriMetl PyraFlat Half Nipples

PyraFlat flanges are the Thermionics line of rectangular and odd-shaped all-metal flanges. PyraFlat flanges employ the same reliable sealing principle as CF flanges. The PyraFlat flange has been used successfully at synchrotron facilities for over 10 years.

TriMetl transition tubes are available for attachment to PyraFlat flanges. This allows the use of the reliable seal of the standard stainless steel PyraFlat flange assembly for rectangular ports on aluminum beamlines or chambers.


Ordering Information

[Drawing]

TriMetl Transitions and Half Nipples

  Flange O.D. A B C D E Style Model No.
Mini Flanges
1.33
0.50
0.75
2.20
1.00
Nonrotatable
ATS-133-075/N
1.33
0.50
0.75
2.20
1.00
Nonrotatable Tapped
ATS-133-075/NT
1.33
0.50
0.75
2.20
1.00
Rotatable
ATS-133-075/R
1.33
0.50
0.75
2.20
1.00
Rotatable Tapped
ATS-133-075/RT
Transition Only
0.50
0.75
1.00
.75
Without Flange
ATS-075
2-3/4" Flanges
2.75
1.25
1.50
1.91
1.75
Nonrotatable
ATS-275-150/N
2.75
1.25
1.50
1.91
1.75
Nonrotatable Tapped
ATS-275-150/NT
2.75
1.25
1.50
1.91
1.75
Rotatable
ATS-275-150/R
2.75
1.25
1.50
1.91
1.75
Rotatable Tapped
ATS-275-150/RT
Transition Only
1.25
1.50
1.75
1.505
Without Flange
ATS-150
4-1/2" Flanges
4.5
2.25
2.50
2.08
2.75
Nonrotatable
ATS-450-250/N
4.5
2.25
2.50
2.08
2.75
Nonrotatable Tapped
ATS-450-250/NT
4.5
2.25
2.50
2.08
2.75
Rotatable
ATS-450-250/R
4.5
2.25
2.50
2.08
2.75
Rotatable Tapped
ATS-450-250/RT
Transition Only
2.25
2.50
2.75
2.505
Without Flange
ATS-250
6" Flanges
6.00
3.75
4.00
2.14
4.25
Nonrotatable
ATS-600-400/N
6.00
3.75
4.00
2.14
4.25
Nonrotatable Tapped
ATS-600-400/NT
6.00
3.75
4.00
2.14
4.25
Rotatable
ATS-600-400/R
6.00
3.75
4.00
2.14
4.25
Rotatable Tapped
ATS-600-400/RT
Transition Only
3.75
4.00
4.25
4.005
Without Flange
ATS-400
8" Flanges
8.00
5.75
6.00
2.20
6.25
Nonrotatable
ATS-800-600/N
8.00
5.75
6.00
2.20
6.25
Nonrotatable Tapped
ATS-800-600/NT
8.00
5.75
6.00
2.20
6.25
Rotatable
ATS-800-600/R
8.00
5.75
6.00
2.20
6.25
Rotatable Tapped
ATS-800-600/RT
Transition Only
5.75
6.00
6.25
6.005
Without Flange
ATS-600
10" Flanges
10.00
7.75
8.00
2.20
8.25
Nonrotatable
ATS-1000-800/N
10.00
7.75
8.00
2.20
8.25
Nonrotatable Tapped
ATS-1000-800/NT
10.00
7.75
8.00
2.20
8.25
Rotatable
ATS-1000-800/R
10.00
7.75
8.00
2.20
8.25
Rotatable Tapped
ATS-1000-800/RT
Transition Only
7.75
8.00
8.25
8.005
Without Flange
ATS-800
Dimensions in inches


Explosive Bonding

Explosive bonding is an effective means of joining dissimilar metals. The high pressure of the explosion creates an abrupt, uniform metallurgical bond at the interface of the joined metals. The bonded material retains each of the bonded metals initial physical and mechanical properties.

Diffusion bonding, roll bonding and brazing all fall short of the quality of an explosive bond. In these other metal-joining processes, areas of the transition may form brittle intermetallic layers or there may be unpredictable areas of void in the bond line. In UHV components, the inconsistencies in this type of bonded material can become leak failures.

Explosively-bonded material—with its strong uniform bonds—will not leak and, therefore, is an excellent choice for integrating components of various metals in a vacuum system.

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