Curtain bellows are available in almost any size or material to meet a variety of applications or environments. Flat bellows may incorporate stiffener guides to help hold their original shape and allow them to be mounted vertically or horizontally. Other options include Flanges with mounting hole patterns and Velcro strips that simplify mounting. Typical applications are to screen an area to prevent accumulation of debris in a recess or to provide protection in a single plane.
Diagrams of End Conditions
Mounting Hole Pattern in Flange Ends
Customers may specify the mounting hole pattern they need on the sewn fabric flange end of bellows. These mounting holes permit easy installation of bellows onto the customer’s machinery. If added mounting stiffness is required, customers may add as an option, steel back up flanges with coordinating hole patterns.
Steel Back Up Flange
Steel back up flanges are sometimes used in addition to the flange ends of way covers and bellows. These steel flanges provide additional stiffness when mounting bellows and covers to machine elements. Customers may specify a mounting hole pattern to match that of the sewn fabric flange end on the bellows.
Velcro strips offer another option for mounting the flange ends of bellows and covers. These strips, which are attached to the flat face of flanges, are available in both cloth and plastic Velcro materials. Customers using Velcro strips do not need to specify a mounting hole pattern for flanges.
|Coating (Col-mdor)||Base Mat'l||Nominal Thickness||Temperature Range||Properties||Limitations|
|Nylon||.020" (.51 mm)||-60° F to 250° F
(-51° C to 121° C)
|Resistant to moderate chemicals, acids, oils, fats, grease and many solvents. Good weathering and physical properties, flame retardant.||Attacked by strong oxidizing acids, esters, ketones, chlorinated aromatic and nitro hydrocarbons.|
(Black or Green)
|Nylon||.023" (.53 mm) to .024" (.61 mm)||-60° F to 300° F
(-51° C to 149° C)
|Well suited for use in corrosive chemical environments. Offers additional resistance particularly against oxidizing agents like sulfuric acid, hypachlorites, high ozone, moderate chemicals, acids, oils, fats, grease and many solvents. Good weathering and physical properties, flame retardant.||Attacked by concentrated oxidizing acids, esters, ketones, chlorinated aromatic and nitro hydrocarbons.|
|Fiberglass||.020" (.51 mm)||-100° F to 550° F
(-73° C to 288° C)
|Excellent heat resistance and is not combustible. Will not rot or decay. Resistant to many solvents, weather and corrosive vapors. Has a 95% reflective heat property.||Man-made material whose main constitute is silica sand. Begins to melt at 750° F.|
|Fiberglass||.022" (.55 mm)||-100° F to 450° F
(-73° C to 232° C)
|Resistant to moderate or oxidizing chemicals, ozone and concentrated sodium hydroxide.||Attacked by many solvents, oils, concentrated acids and diluted sodium hydroxide.|