
Bulletin 74.2:Y696
5
Table 4. Fluid Compatibility of Elastomers
FLUID
MATERIAL
Neoprene (CR) Nitrile (NBR) Fluorocarbon (FKM) Ethylenepropylene (EPDM) Peruoroelastomer (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 Sulde (Dry)
Hydrogen Sulde (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 specic gravity nitrogen. For gases of
other specic gravities, multiply the given SCFH capacity
of nitrogen by 0.985, and divide by the square root of the
appropriate specic gravity of the gas required. Then, if
capacity is desired in Nm
3
/h, multiply SCFH by 0.0268.
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