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Bulletin 74.2:Y696
5
Table 4. Fluid Compatibility of Elastomers
FLUID
MATERIAL
Neoprene (CR) Nitrile (NBR) Fluorocarbon (FKM) Ethylenepropylene (EPDM) Peruoroelastomer (FFKM)
Acetic Acid (30%)
Acetone
Air, Ambient
Air, Hot [200°F (93°C)]
Alcohol (Ethyl)
Alcohol (Methyl)
Ammonia (Anhydrous)(Cold)
B
C
A
C
A
A
A
C
C
A
B
C
A
A
C
C
A
A
C
C
C
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Ammonia (Gas, Hot)
Beer
Benzene
Brine (Calcium Chloride)
Butadiene Gas
Butane (Gas)
B
A
C
A
C
A
C
A
C
A
C
A
C
A
B
B
B
A
B
A
C
A
C
C
A
A
A
A
A
A
Butane (Liquid)
Carbon Tetrachloride
Chlorine (Dry)
Chlorine (Wet)
Coke Oven Gas
C
C
C
C
C
A
C
C
C
C
A
A
A
B
A
C
C
C
C
C
A
A
A
A
A
Ethyl Acetate
Ethylene Glycol
Freon 11
Freon 12
Freon 22
C
A
C
A
A
C
A
B
A
C
C
A
A
B
C
B
A
C
B
A
A
A
A
A
A
Freon 114
Gasoline (Automotive)
Hydrogen Gas
Hydrogen Sulde (Dry)
Hydrogen Sulde (Wet)
A
C
A
A
B
A
B
A
A
(1)
C
B
A
A
C
C
A
C
A
A
A
A
A
A
A
A
Jet Fuel (JP-4)
Methyl Ethyl Ketone (MEK)
MTBE
Natural Gas
B
C
C
A
A
C
C
A
A
C
C
A
C
A
C
C
A
A
A
A
Nitric Acid (50 to 100%)
Nitrogen
Oil (Fuel)
Propane
C
A
C
B
C
A
A
A
B
A
A
A
C
A
C
C
A
A
A
A
Sulfur Dioxide
Sulfuric Acid (up to 50%)
Sulfuric Acid (50 to 100%)
Water (Ambient)
Water [at 200°F (93°C)]
A
B
C
A
C
C
C
C
A
B
A
A
A
A
B
A
B
B
A
A
A
A
A
A
A
1. Performance worsens with hot temperatures.
A - Recommended
B - Minor to moderate effect. Proceed with caution.
C - Unsatisfactory
N/A - Information not available
2. From Table 5 the desired air ow rate = 4000 SCFH
(107 Nm
3
/h) air due to thermal heating.
3. Total required ow rate = 4400 SCFH (118 Nm
3
/h) air.
4400 SCFH (118 Nm
3
/h) converts to 4500 SCFH
(121 Nm
3
/h) nitrogen.
4. From Table 7, with a 2-inches w.c. (5 mbar), and an outlet
pressure of 5-inches Hg, an NPS 1-1/2 or 2 (DN 40 or 50)
body size would ow 5130 SCFH (137 Nm
3
/h) nitrogen.
This would satisfy the desired ow rate of 4500 SCFH
(121 Nm
3
/h) nitrogen.
Capacity Information
Table 7 gives typical nitrogen regulating capacities at
selected inlet pressures and outlet pressure settings. Flows
are in SCFH (at 60°F and 14.7 psia) and Nm
3
/h (at 0°C and
1,01325 bar) of 0.97 specic gravity nitrogen. For gases of
other specic gravities, multiply the given SCFH capacity
of nitrogen by 0.985, and divide by the square root of the
appropriate specic gravity of the gas required. Then, if
capacity is desired in Nm
3
/h, multiply SCFH by 0.0268.
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