Compare Model Drawings, CAD & Specs Tube OD Elbow Radius Tangent Length Modulus Wall Thickness Availability Price
0.75 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT075
$23.53
In Stock
 1002390WT075 0.5 in. 1.125 in. 0.29 in. 0.75 in. 0.065 in.
In Stock
 $23.53
1 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT100
$23.53
In Stock
 1002390WT100 1.0 in. 1.5 in. 0.56 in. 2.06 in. 0.065 in.
In Stock
 $23.53
1.5 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT150
$25.23
In Stock
 1002390WT150 1.5 in. 2.25 in. 0.69 in. 2.94 in. 0.065 in.
In Stock
 $25.23
2 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT200
$45.05
In Stock
 1002390WT200 2.0 in. 3.0 in. 1.06 in. 4.06 in. 0.065 in.
In Stock
 $45.05
2.5 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT250
$66.99
In Stock
 1002390WT250 2.5 in. 3.75 in. 1.44 in. 5.19 in. 0.065 in.
In Stock
 $66.99
3 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT300
$75.08
In Stock
 1002390WT300 3.0 in. 4.5 in. 1.81 in. 6.31 in. 0.065 in.
In Stock
 $75.08
4 inch 90 degree butt weld elbow with tangents vacuum fitting
1002390WT400
$118.97
In Stock
 1002390WT400 4.0 in. 6.0 in. 2.31 in. 8.31 in. 0.083 in.
In Stock
 $118.97
4 inch 90 degree thick wall butt weld elbow with tangents vacuum fitting
1002390WT401
$118.97
In Stock
 1002390WT401 4.0 in. 6.0 in. 2.31 in. 8.31 in. 0.065 in.
In Stock
 $118.97

Specifications

  • Component Type
    Buttweld 90 Degree Elbow with Tangents
  • Series
    Series 23
  • Material
    304 Stainless Steel

Features

Buttweld Component Construction

Butt weld vacuum fittings and components are constructed of 304 or 304L welded, drawn, and annealed stainless steel tubing. For most vacuum process applications, this provides the best combination of the following critical features:

  • Low outgassing under vacuum
  • Chemically resistant
  • Consistent leak free welding
  • Minimized corrosion concentration points
  • Cost consistent with the above requirements

Buttweld components are fabricated using pulled port and 100% penetration TIG weld techniques. All welded components are leak free, carefully cleaned for high vacuum use and then packaged to remain clean until the time of installation.

Recommended Welding Techniques

Butt weld fittings are designed to be welded using internal (socket type) welding and external buttwelding. The most commonly used type of weld for high vacuum applications is a Tungsten Inert Gas (TIG) fusion weld, preferably without filler rod. For the best results, remove vacuum components from packaging in clean conditions during installation. Use clean gloves to handle the components and equipment in the absence of any fibers, fingerprint oils, or other greases.

General hints for good vacuum welds include:

  • Always start with clean and properly weld prepped components.
  • For internal welds, minimize warping by using only enough heat for 60-75% penetration.
  • For external buttwelds, make sure they are 100% penetration with no internal cracks or crevices.
  • Do not weld internally then externally around the entire circumference of the fittings
  • Make sure there is little or no gap between pieces to be welded
  • Ensure that all surfaces affected by the heat of the weld, especially the vacuum side, are purged properly with inert gas.