Diaphragm Selection and Materials
Diaphragm Selection
and Materials
Elastomeric
- built like a tire - especially compound materials - ruggedly reinforced
with fabric piles and designed to take a great deal of physical abuse. The
sealing bead provides a greater sealing ability by localizing closing forcs
for bubble-tight shut-off.
TFE Faced - over the years, a broad range of elastomeric
and plastic diaphragms have been developed which will successfully handle
all aggressive fluids, gases and slurries, as well as food, beverage and
pharmaceutical products where F.D.A. approval of materials of construction
is required. The TFE faced diaphragm is backed with fabric reinforced elastomer
to provide the high chemical and temperature resistant qualities of TFE with
flexibiliy for longer life and tighter shut-off.
Diaphragm Materials
CODE |
MATERIALS |
TEMPERATURE RANGE |
SIZE RANGE |
TYPICAL APPLICATIONS |
|---|---|---|---|---|
R |
Natural Rubber |
0 to 180F |
1/2" - 8" |
Wet or Dry Abrasives at moderate temperatures |
N |
Neoprene |
0 to 200F |
1/2" - 8" |
Acids, Alkalies, Alcohol and Oil |
H |
Hypalon* |
-30 to 250F |
1/2" - 8" |
Acids, Caustics and Oil |
E |
Ethylene Propylene Rubber |
-30 to 300F |
1/2" - 8" |
Excellent chemical and abrasive resistance at elevated temperatures |
V |
Viton* |
-20 to 350F |
1/2" - 8" |
Aggressive chemicals, acids and oil. High temperature service |
T |
TFE Faced |
-30 to 300F |
1/2" - 8" |
Maximum resistance to aggressive chemicals and solvents at elevated temperatures. Excellent ant-stick properties |
B |
Butyl |
-15 to 212F |
1/2" - 8" |
Acids and Alkalies |
WE |
White EPR |
-30 to 300F |
1/2" - 8" |
Excellent chemical and abrasive resistance at elevated temperatures. Food Grade - F.D.A. approved |
WB |
White Butyl |
-15 to 212F |
1/2" - 8" |
Acids and Alkalies. Food Grade |
* - Hypalon and Viton are registered trademarks of Dupont Dow
Elastomers.
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