Emerson Daniel 1770, User Manual

Page: 46 / 80

Environmental conditions
(continued)
Table 2-2:
Parameter type Description
Corrosive service Select the material compatible with the specific processes and
atmospheric environments. Implement a periodic inspection
and maintenance program to ensure that pressure retaining
components are free from corrosion and erosion.
The valve is not designed with corrosion allowance. Inspect the
valve's metal parts periodically for corrosion and erosion, and in-
spect the seals and O-rings for wear and chemical deterioration.
Low and freezing temperatures Specific gravities and viscosities at low or freezing temperature
will reduce the flow range of the valve. Refer to
Section 1.2.3 for
more information.
Populated areas For new installations, locate the control valve to an area that has
fewer than 10 buildings intended for human occupancy within
an area that extends 200 meters (220 yards) radially from the
control valve. (Reference: Class 1 Location: U.S. DOT, CFR Title
49: Part 192.5)
Closed, poorly ventilated areas Install the control valve in a well ventilated area, not less than
one meter (approximately three feet) from source of ignition or
source of heat which might damage the unit.
Elevation No limit
Humidity No limit
Proximity to open flame Provide fire prevention measures and equipment per local regu-
lations.
Proximity to vehicular traffic The design of the control valve has not been assessed for the ef-
fects of traffic.
2.2 Specifications for the control valve
2.2.1 Interface requirements
WARNING!
EXCEEDING REQUIREMENTS HAZARD
Control valve requirements are defined to ensure safe equipment operation. Do not exceed
published specifications.
Failure to comply may result in death, serious injury and/or damage to the equipment.
Operating conditions and specifications
36 Differential Control Valve