Operating Conditions And Specifications; Operating Conditions For The Model 770 - Emerson Daniel 770 User Manual

2 Operating conditions and
specifications
Topics covered in this chapter:
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2.1

Operating conditions for the Model 770

Table 2-1:
Condition type
Fluid phase
Process temperature
Optional process tempera-
ture
Fluid velocity
Fluid(s) controlled
Differential pressure
Atmospheric pressure
Sizes (NPS)
Pressure class (ANSI)
Maximum safe working
temperature range
User Manual
Operating conditions for the Model 770
Specifications for the control valve
Pilot spring selection
Operating conditions for the Model 770 control valve
Description
Liquid
-29 °C to 66 °C (-20 °F to 150 °F)
-46 °C to 204 °C (-50 °F to 400 °F)
Operational recommended flow velocity up to 30 ft/sec. Beyond this
point a high pressure drop and increased wear will result.
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The maximum allowable differential pressure of a control valve is
6894 kPa (1,000 psi). Consult factory for location of first shut-down
valve.
Absolute
2, 3, 4, 6, 8,10,12,16
150, 300, 600
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Low/Medium viscosity crude oils and condensates
Refined products and intermediates (e.g.: gasoline, diesel, kero-
sene, light fuel oils, jet fuel, LPG, butanes, naphtha, alkylate, refor-
mate, straight run gasoline, cat-cracked gasoline)
Petrochemicals (e.g.: benzene, toluene, xylenes, cumene, olefins,
pyrolysis gasoline)
Natural gas liquids
-26 °C to 204 °C (-15 °F to 400 °F)
Using FKM O-rings
Temperature range is dependent on O-ring T
Consult the factory for other safe working temperatures

Operating conditions and specifications

and T
min max
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