Baker Hughes Masoneilan 4700P, Instruction Manual

Page: 22 / 66

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The use of a filter regulator with a 5 micron filter is recommended for the air supply. Tubing
used for piping between filter regulator, positioner, and actuator should be 1/4” minimum, with
3/8” used for larger actuators with 4700P/4800E positioner.
WARNING
Never exceed actuator or positioner maximum supply
pressure. Damage to equipment or injury to personnel
may result.
CAUTION
Do not use pipe thread sealant tapes on pneumatic
fittings, as it tends to shred small particles which can
cause instrument malfunction.
The use of soft setting anaerobic hydraulic seal, such
as Loctite Hydraulic Seal 542, is recommended. Follow
manufacturer’s instructions.
CAUTION
Do not use an excessive amount, as it will not set and
may migrate into the instrument.
The pneumatic input signal ranges are 3-15 psig (20-
100 kPa or 207- 1034 mbar), 6-30 psig (40-200 kPa or
414-2068 mbar), and 3-27 psig (20-180 kPa or 207-
1862 mbar). Split ranges are available.
Positioners with 24 psig signal span (i.e., 6-30 psig and
3-27 psig) require a different diaphragm assembly as
shown in Figure 18 on page 56.
Maximum allowable air supply pressure to the
positioner varies according to actuator, valve size,
and type. See pressure drop tables in valve catalog to
determine correct positioner supply pressure.