Coated Fabrics for Diaphragms

Many diaphragm applications require that the rolling diaphragms be coated with rubber on both sides, commonly referred to as "double-coat" diaphragms. This type of rolling diaphragm is typically required when the application sees pressure on both sides of the diaphragm in two ways:

First, we utilize our proprietary double-coat molding process, we are able to provide double-coat diaphragms directly from rubber and fabric.

Second, we develop and maintain an inventory of standard "coated-fabrics", that is, fabric that is coated on both sides by a sub-contractor using a variety of materials. The selection of the proper double-coat process and materials requires an understanding of both the rubber and fabric used in its fabrication as well as the overall geometry of the rolling diaphragm. DiaCom technical personnel are available to assist in the proper selection of coated fabric.

Coated Fabrics Chart

DiaCom
Material
Designation
Fabric Style
Fabric
Gauge
(Inches)
Fabric
Gauge
(mm)
Maximum
Recommended Operating Temperature
Fabric
Tensile
Strength
(PSI)
Fabric
Tensile
Strength
(BAR)
General Physical Properties
FCDA-1015
FCGB-0806
FCGB-1325
Viton-Coated Polyester
Nitrile-Coated Nylon
Nitrile-Coated Nylon
.0090-.0120
.0075-.0085
.0110-.0150
.2286-.3048
.1905-.2159
.2794-.3810
302°F (150°C)
250°F (120°C)
250°F (120°C)
50
150
150
.0345
.1034
.1034
Medium duty, good chemical resistance
Medium duty, good formability
Medium duty, good formability
FCGB-1330
FCGB-5038
FCGB-8513
Nitrile-Coated Nylon
Nitrile-Coated Nylon
Nitrile-Coated Nylon
.0110-.0150
.0470-.0530
.0820-.0900
.2794-.3810
1.1938-1.3462
2.0828-2.2860
250°F (120°C)
250°F (120°C)
250°F (120°C)
150
350
350
.1034
.2413
.2413
Medium duty, good formability
High strength, good formability
High strength, limited formability
FCGD-0600
FCGE-1032
FCMB-1326
Nitrile-Coated Silk
Nitrile-Coated Cotton
Neoprene-Coated Nylon
.0050-.0065
.0080-.0120
.0010-.0150
.1270-.1651
.2032-.3048
.0254-.3810
212°F (100°C)
302°F (150°C)
250°F (120°C)
28
55
150
.0193
.0379
.1034
Ultra sensitive, fuel resistant
Medium duty, good formability
Medium duty, good formability

 

 

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