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BLACOH Industries
Temperature Limits
Operating temperatures are based on the maximum temperature of the wetted dampener components only. Non-wetted dampener
components may have a lower temperature limit. Temperature and certain chemicals may reduce the maximum allowable working pressure
(MAWP) of the dampener.
CAUTION!
Plastic (non-metallic) body materials lose strength as temperature increases, which reduces the maximum pressure sustainable
by the material. All plastic materials must have an appropriate derating factor applied when working at elevated temperatures above 73.4°F
(23°C) to determine maximum allowable working pressure (MAWP).
Elastomer
Materials
Temperature Limits
Applications
Aflas
0°F to +400°F
(-18°C to +204°C)
High temperature, petroleum based chemicals, strong acids and bases.
Buna-N
+10°F to +180°F
(-12°C to +82°C)
Good flex life; use with petroleum, solvents and oil-based fluids.
FDA Buna-N
+10°F to +180°F
(-12°C to +82°C)
FDA-approved food grade; similar characteristics of regular Buna-N.
EPDM
-60°F to +280°F
(-51°C to +138°C)
Use in extreme cold; good chemical resistance with ketones, caustics.
FDA EPDM
-50°F to +225°F
(-45°C to +107°C)
FDA-approved food grade; similar characteristics of regular EPDM.
Hypalon
-20°F to +275°F
(-29°C to +135°C)
Excellent abrasion resistance; good in aggressive acid applications.
Neoprene
0°F to +200°F
(-18°C to +93°C)
Good abrasion resistance and flex; use with moderate chemicals.
PTFE Diaphragm
+40°F to +220°F
(+4°C to +104°C)
Use with highly aggressive fluids.
PTFE Bellows
-20°F to +220°F (-29°C to +104°C)
Exclusive bellows design with excellent flex life; use with highly aggressive fluids.
Santoprene
-20°F to +225°F
(-29°C to +107°C)
Excellent choice as a low cost alternative for PTFE in many applications.
FDA Silicone
-20°F to +300°F
(-29°C to +149°C)
FDA-approved food grade material; for use in food and pharmaceutical processing.
Viton
®
-10°F to +350°F
(-23°C to +177°C)
Use with hot and aggressive fluids; good with aromatics, solvents, acids and oils.
Non-Metallic
Body Materials
Temperature Limits
Applications
Acetal*
+32°F to +175°F
(0°C to +79°C)
Good flex life; low moisture sensitivity; high resistance to solvents and chemicals.
CPVC
+32°F to +180°F
(0°C to +82°C)
Chlorinated PVC (CPVC): Good general chemical resistance; loses strength as
temperature rises.
Noryl
+32°F to +220°F
(0°C to +104°C)
Good resistance to acids and bases; good temperature stability.
Polypropylene*
+32°F to +175°F
(0°C to +79°C)
Good general purpose plastic; broad chemical compatibility at medium temperatures.
PTFE
+40°F to +220°F
(+4°C to +104°C)
Use with highly aggressive fluids, high temperatures.
PVC
+32°F to +140°F
(0°C to +60°C)
Good general chemical resistance; loses strength as temperature rises.
PVDF
+10°F to +200°F
(-12°C to +93°C)
Excellent resistance to most acids and bases; high temperatures.
*
Conductive Acetal and Conductive Polypropylene available.
[T22E11_030]
Metal Bellows
Temperature Limits
Applications
SS w/Gaskets*
-200°F to +800°F (-129°C to +426°C)
Excellent for applications pumping frigid and molten fluids, outdoor applications in
extreme temperatures, chemical applications where elastomers or PTFE would fail.
*
Contact Blacoh for more information regarding temperatures below
-200°F (-129°C).
Maximum allowable working pressure is reduced slightly for metal bellows at temperatures above
400°F (204°C). Apply an appropriate
derating factor to determine maximum allowable working pressure (MAWP).
