Baker Hughes Masoneilan 4700P, Инструкция по эксплуатации

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Masoneilan 4700P/E & 4800P/E Positioners Manual | 21 © 2021 Baker Hughes Company. All rights reserved.
Pneumatic Installation
NOTE
The output and supply connections for the 4700E/P and 4800E/P
are different from those on the 4600A. “Mounting Cam Coupling”
on page 34.
These positioners are designed to operate only with clean, dry, oil-free, instrument grade air to
ASME/ASA-57.3 1975 (R1981) or ISA-S7.3-1075 (R1981).
Dew point At least 18 °F (10 °C) below minimum anticipated ambient temperature
Particulate
matter
Filtered to below 5 microns
Oil content Less than 1 ppm w/w or v/v
Contaminants Free of all corrosive contaminants and hazardous gases, flammable or toxic
The signal connections of 4700P and 4800P and the output and supply connections of 4700P
and 4700E are tapped 1/4” NPT. The output and supply connections of 4800P and 4800E
are tapped 3/8” NPT
.
There is also an exhaust connection with a plastic square head plug in
it. If the action of the positioner is reversed, 4700P/4800P only, then the supply and exhaust
connections must be interchanged. With reverse action, the
Supply
gauge must be removed
and replaced by an 1/8” NPT plug installed in the supply connection. Since the new supply
connection has no gauge port, connect the removed
Supply
gauge to the filter regulator to
indicate regulator output pressure.
Figure 10 on page 23 shows pneumatic connections for both the 4700P/4800P and
4700E/4800E positioners. The 4700E/4800E has the
Instrument
port sealed by a 1/4” NPT
Plug; do not remove plug or make any other connections to this port.