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The Vanguard Sight Glass Piping Compensator is designed for industrial applications. The basic concept of the piping compensator was originally developed by Rotherm Engineering for steam line applications in the paper industry. This model offers pipe compensation and a sight glass.

Provides universal compensation for pipe movement-up to 35 percent of the overall length of the standard compensator casing (Dim A)

Becomes an integral part of the piping system-eliminating the need for tie rods, anchors, hinges, gimbals or other alignment devices.

Ten degrees angular compensation.

Full circle (360 degrees) torsion rotation-making it possible to install without the expense of unions.

Longitudinal compensation can be as much as 2D (see dimensional diagram) while lateral compensation is 0.0876 L, less calculated compression allowance for nipples, D.

Do not use stainless steel liners.
Vanguard Sight Glass Expansion Joints-1
Dimensional Drawing
Unit of Measure
Items Vanguard Sight Glass Expansion Joints-1
6310204-SG
1" Vanguard Sight Glass Expansion Joint
Vanguard Sight Glass Expansion Joints-1
6310205-SG
1 1/4" Vanguard Sight Glass Expansion Joint
Vanguard Sight Glass Expansion Joints-1
6310206-SG
1 1/2" Vanguard Sight Glass Expansion Joint
Vanguard Sight Glass Expansion Joints-1
6310208-SG
2" Vanguard Sight Glass Expansion Joint
Vanguard Sight Glass Expansion Joints-1
6310210-SG
2 1/2" Vanguard Sight Glass Expansion Joint
Size N/A 1 in N/A 1 1/4 in N/A 1 1/2 in N/A 2 in N/A 2 1/2 in
Dimension A1 N/A 10 1/8 in N/A 10 1/8 in N/A 11 1/2 in N/A 12 15/16 in N/A 13 1/16 in
Dimension B2 N/A 6 1/8 in N/A 6 1/8 in N/A 7 3/8 in N/A 9 1/16 in N/A 9 1/16 in
Dimension C N/A 5 5/8 in N/A 5 5/8 in N/A 6 5/8 in N/A 8 in N/A 8 in
Dimension D N/A 2 1/8 in N/A 2 1/8 in N/A 2 in N/A 3 in N/A 3 in
Dimension E N/A 1.315 in N/A 1.660 in N/A 1.900 in N/A 2.375 in N/A 2.875 in
Dimension F N/A 2 1/4 in N/A 2 1/4 in N/A 2 3/4 in N/A 4 in N/A 4 in
Dimension G N/A 2 1/2 in N/A 2 1/2 in N/A 3 3/16 in N/A 4 1/3 in N/A 4 1/2 in
Dimension H3 N/A 13/32 in N/A 13/32 in N/A 33/64 in N/A 39/64 in N/A 39/64 in
Dimension I N/A 5 º
Dimension J N/A 2 1/16 in N/A 2 1/16 in N/A 2 15/16 in N/A 2 19/32 in N/A 3 31/32 in
Dimension K N/A 1 in N/A 1 1/4 in N/A 1 1/2 in N/A 2 in N/A 2 1/2 in
Dimension L N/A 4 11/16 in N/A 4 11/16 in N/A 6 in N/A 7 1/16 in N/A 7 1/16 in
Eff. Area N/A 3.142 in² N/A 3.142 in² N/A 3.976 in² N/A 9.621 in² N/A 9.621 in²
  • 1 Dimension may vary up to 1/4" subject to individual installation practice.
  • 2 Dimension may vary up to 1/4" subject to individual installation practice.
  • 3 Dimension shows total lateral (parallel) compensation (formula: H - 0.0876L)