Non-Metallic Expansion Joints (NMEJ) offers a number of advantages, especially in plant design and building. They take up movements in several directions simultaneously, have almost no reactive forces, need little space for installation, are easy to adapt to existing physical conditions, and they are easy to transport and install.
NMEJ are designed on the basis of:
Each NMEJ is custom built to suit the application in question with regard to:
These NMEJs can be manufactured (against order) in all the necessary shapes and forms according to customer requirement viz. round, rectangular, square, oval, conical or combinations in different configurations shown below.
All fabric can be supplied as fabric part only or pre-assembled on steel parts for quick installation in the duct system.
This variety includes a range of single layer expansion joints, consisting of specially developed materials, which cover a temperature range of -65°C to +200°C.
This series include a range of multi-layer expansion joints, covering most operating conditions in air or gas duct systems. The individual type of expansion joint is chosen on the basis of chemical composition of the medium, maximum operating temperature etc. KELD Flexfab series can be supplied with or without a membrane - which is impervious and resistant to chemicals. Similarly the type of outer cover can also be varied depending upon the operating and customer requirement.
This series includes a range of products developed exclusively for the cement industry. The special feature of this series is its outer cover, which provides mechanical protection to the fabric expansion joint.
This series are generally used only when the application temperature is very high (beyond 750°C) or the application demands a special pre-formed fabric expansion joints.
KELD has also specialized in the following applications for expansion joints: