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2
Operating conditions and
specifications
Topics covered in this chapter:
•
Operating conditions for the control valve
•
Description of the Models 762, 763, 765, 766 and 767 Control Valves
2.1
Operating conditions for the control valve
Table 2-1:
Condition type
Fluid phase
Process temperature
Optional process tempera-
ture
Fluid velocity
Fluid(s) controlled
Viscosity limits on valves
Differential pressure
Atmospheric pressure
Sizes (NPS)
Maximum safe working
temperature range
User manual
Operating conditions for the control valve
Description
Liquid
-26°C to 205°C (-15°F to 400°F)
-46°C to 205°C (-51°F to 400°F)
Operational recommended flow velocity up to 58 ft/sec, beyond this
point will result in a high pressure drop and increased wear.
•
Low/Medium viscosity crude oils and condensates
•
Refined products and intermediates (ie: gasoline, diesel, kerosene,
light fuel oils, jet fuel, LPG, butanes, naphtha, alkylate, reformate,
straight run gasoline, cat-cracked gasoline)
•
Petrochemicals (ie: benzene, toluene, xylenes, cumene, olefins, py-
rolysis gasoline)
•
Natural gas liquids
•
Maximum valve viscosity is 8800 Cst
•
Maximum viscosity for valves with pilots is 440 Cst due to re-
sponse time of high viscosity pilot
The maximum allowable differential pressure across 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
•
-26°C to 205°C (-15°F to 400°F)
•
Using FKM O-rings
•
Temperature range is dependent of O-ring T
•
Consult the factory for other safe working temperatures
USER MANUAL
Operating conditions and specifications
and T
min
max
43
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49
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