EVR Duct Connectors

DF-01 Duct Connector

Features
• Relative light weight
• Non-conductive
• Abrasion & corrosion resistant
• High fatigue resistance
• Wide material selection
• Movement achieved with relatively low force

Flue Duct Connectors are designed to absorb thermal movements and vibrations in industrial duct work. They are designed to handle hot corrosive gases found in industrial ducting systems and eliminate vibration cause by equipment such as fans, scrubbers, and mechanical dust collectors.

DF-01 Flue Duct Connectors can be constructed either flanged or belted in various sizes, shapes and configurations for easy installation in any type of duct. Insulation pillows can be included for certain high temperature applications. Baffles are required where the gas stream contains particulates which might abrade the inner surface of the joint. Square, rectangular or round shapes can be produced in any size.

Available Elastomers
Ethylene Propylene Rubber(EPDM) - Viton™(FKM) - Butyl(CIIR) - Neoprene(CR) - Teflon™(AFMU) - Silicon - Mineral Fibre

DF-01/DB-04 (Flat) Expansion Joints are designed for applications requiring standard movement, maximum noise, vibration and sound absorption.

DF-02/DB-05 (Radius) Expansion Joints offer superior axial and lateral movement capabilities without pre-compression or pre-extension.

DF-03/DB-06 (Arch) Expansion Joints are designed for high movement in short face-to-face applications. Primarily used in positive pressure systems having high axial compression and extension movements.

Baffles or flow liners are used when the gas stream contains particulates which may impinge upon or abrade the inner surface of the duct connector. Baffles can be constructed as a one-piece or two-piece element, depending on movement requirements and service conditions.

Elastomeric Type - This type of expansion joint is constructed of elastomers and reinforced with high strength fabric. Choice of elastomer and fabric, depends on applications conditions. Maximum temperature for elastomeric expansion joints is 400° F.

Composite Type - Suitable for temperatures from 400°F to 2500°F, composite type expansion joints consist of various plies of materials laid one over the other and vulcanised, bonded, sewn or mechanically fastened together in the clamp area. This allows each layer of material to function independently of the others.

High Temperature and Buildup Solutions - Fly ash or other solid particulates can accumulate between the expansion joint and flow liner in such quantities that damage to the expansion joint may occur. A mesh or cloth seal between the liner and ducting can help prevent this problem. Another method of eliminating this buildup is the use of an insulation pillow to fill the cavity. Insulation pillows can also be used to increase the upper temperature limits of the expansion joint. Care must be taken when using an insulation pillow, so that corrosive chemicals do not condense in the cooler region adjacent to the expansion joint and duct work.

DF-60 Duct Connector

Features
• Relative light weight
• Non-conductive
• Abrasion & corrosion resistant
• High fatigue resistance
• Wide material selection
• Movement achieved with relatively low force

Available in round or rectangular configurations, the DF-60 is designed for use in duct systems where pressure, abrasion and mechanical movement preclude the use of conventional ducting connectors. The external metal reinforcement and high strength synthetic reinforcing fabrics allow working pressures in excess of 25 PSIG. The wide arch design and rounded corners of the rectangular style allow for high movement capabilities while reducing fatigue due to flexing. Abrasion resistant rubbers allow the use of this expansion joint in applications such as discharge chutes, pneumatic conveyors and vibratory feeders. EVR DF-60 Expansion Joints are available in a wide range of elastomers and fabrics to suit most corrosive and temperature environments up to 400°F. To receive a design proposal, contact EVR to get a DF-60 Expansion Joint for your specific application requirements.

Available Elastomers
Ethylene Propylene Rubber(EPDM) - Viton™(FKM) - Butyl(CIIR) - Neoprene(CR) - Teflon™(AFMU) - Silicon - Mineral Fibre