Rectangular

Features
DHF designs and manufactures a wide range of single and Universal Rectangular Bellows Assemblies to compensate for axial and lateral movements over a broad cross section of operating conditions.
Single and Universal Rectangular Bellows Assemblies are available in four different corner configurations and two basic span shapes.

Applications
Rectangular bellows assembles are used in gas turbine exhaust systems turbine/condenser connections boiler breaching forced draft flue gas ducts regenerators, precipitations and other hot gas large volume ducting systems

Design note
It is very important when specifying lateral movement to indicate in which direction the movement is in many instances a long Universal Expansion joint Assembly is the only practical solution. Rectangular assemblies can be manufactured from a wide variety of materials including type 300 series stainless steels high nickel alloys and Cor-Ten steel.

The application and operating conditions will dictate the correct choice of span and corner configuration. For low-pressure applications "V" span is used.
For higher-pressure applications up to 2kg/cm² "U" span is preferred.

Single miter "V" span
This is most common and economical type used to compensate for thermal expansion and can readily be bolted ort welded into the connecting duct work. These are preferred in low cycle and vibration -free applications

Double Miter "V" Span
This corner is slightly more expensive to manufacture than the single miter design. However they do provide a greater cycle life under the same set of operating conditions.

Camera Corners "V" Span
These are used mainly on low-pressure applications. They have good cycle life characteristics and are less costly than the double miter corner design

Rounded Corners "U" Span
Should be considered in applications up to 2kg/cm² and where vibration and cycle life are important factors Rounded corners are the most costly to manufacture