Blacoh Sentry, Руководство по установке и эксплуатации

Страница: 6 / 12

5
BLACOH F
LUID
C
ONTROL
, I
NC
.
T
EMPERATURE
L
IMITS
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.
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 +10°F to +180°F (-12°C to +82°C) Good flex life; use with petroleum, solvents and oil-based fluids.
FDA Buna +10°F to +180°F (-12°C to +82°C) FDA-approved food grade; similar characteristics of regular Buna.
EPDM -60°F to +280°F (-51°C to +138°C)
Use in extreme cold; good chemical resistance with ketones,
caustics.
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 +40°F to +220°F (+4°C to +104°C)
Bellows design; 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 in hot and aggressive fluids; good with aromatics, solvents,
acids and oils.
C A U T I O N ! Plastic materials lose strength as temperature increases which reduces the maximum
pressure sustainable by the material.
Non-Metallic
Body Materials
Temperature Limits Applications
PVC See chart below.
Good general chemical resistance; looses strength quickly as
temperature rises.
CPVC +32°F to +180°F (0°C to +82°C) Chlorinated PVC (CPVC) retains strength to higher temperatures.
Acetal* +32°F to +175°F (0°C to +79°C)
Good flex life; low moisture sensitivity; high resistance to solvents
and chemicals.
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.
PVDF +10°F to +200°F (-12°C to +93°C)
Excellent resistance to most acids and bases; highest temperature
plastic available.
* Conductive Acetal and Conductive Polypropylene available.
C A U T I O N ! PVC loses strength more rapidly than other plastic materials as temperature increases.
Certain chemicals can also affect material strength reducing maximum pressure ratings. The chart below
shows reduced maximum pressure ratings based on temperature for PVC only . Note that these are
general guidelines only; selection of dampener materials must be determined by each individual
application to avoid equipment damage and unsafe operation.
PVC Maximum Pressure Guidelines by Temperature
Temperature 73.4°F
(23° C) 80°F
(27°C) 90°F
(32°C) 100°F
(38°C) 110°F
(43°C) 120°F
(48°C) 130°F
(54°C)
Maximum
Pressure
150 psi
(10.3 bar) 142.5 psi
(9.8 bar) 135 psi
(9.3 bar) 112.5 psi
(7.6 bar) 97.5 psi
(6.7 bar) 90 psi
(6.2 bar) 75 psi
(5.2 bar)