Mounting
Styles
Thread-Attached 1/4"
to 1" NPT
Flange-Attached
Sizes: 1/2" to 6"
Rating: 150# to 2,500#
Temperature
Process fluid temperatures
can range from -40 to 600° F. The
determining factors are the fluid diaphragm
material and the bottom housing material.
Fill Fluids:
The fill fluid
fills the void between the instrument
and the diaphragm of the seal. Acting
like a hydraulic system, pressure applied
to the diaphragm displaces the fill fluid,
which causes the instrument to measure
pressure.
| Fill
Fluid |
Temperature
Range: |
| Low
Temperature DC-200 Silicone |
-60
to 300° F |
| High
Temperature DC-200 Silicone |
-40 to 600° F |
| Instrument
Oil |
-30
to 300° F |
| Glycerin |
-35
to 150° F |
| Fluorocarbon |
-50
to 500° F |
Pressure:
Pressure limits are
a function of the diaphragm seal type,
materials being used, and actual temperature.
Thread attached seals with
metal diaphragms may be used up to 2,500
psi at 100° F.
Diaphragm seals with a non-metallic
lower housing (Teflon, PVC, etc.) are
limited to 100 psi
at 140°
F in flange attached versions.
Thread attached versions are limited to
50 psi at 100° F
Metal diaphragm seals with
Teflon diaphragms are limited to 1,500
psi at 100° F
ANSI flanged diaphragm seals
with Teflon diaphragms are limited to
1,500 psi at 100° F.
Accuracy:
Depending on the
diaphragm seal type, accuracy ranges from
±0.5 to ±2%. The accuracy
is referenced at 68° F; changes in
ambient or process temperatures will introduce
temperature errors caused by expansion
of the fill fluid.
Recommendations:
Care must be taken
in selecting components of diaphragm seals.
Process fluids and conditions must be
given careful consideration. Improper
application of these components may result
in failure of the seal and possible damage
to property or injury to personnel. Any
seal connected to a severe oxidizer such
as, but not limited to, Oxygen, Nitric
Acid, Sulfuric acid, etc., must be filled
with fluorocarbon fluid.
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