Dresser Masoneilan 4700E, Instructions Manual

11

Instruction ES2007 4/98

Models 4700P and 4700E

Pneumatic Installation

Note: The output and supply connections for the 4700E/P
are different from those on the 4600A.

These positioners are designed to operate only with clean,
dry, oil-free, instrument grade air to ANSI/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 gasses, flammable
or toxic

The supply, output, and signal connections, at the back of
the manifold, are tapped 

1

/

4

" NPT.  There is also an exhaust

connection with a plastic square head plug in it.  If the action
of the positioner is reversed, 4700 only, then the supply and
exhaust connections must be interchanged.  With reverse
action,  the “Supply” gauge must be removed and replaced
by a 

1

/

8

" NPT plug installed in the supply connnection.

Since the new supply connection has no gauge port,
connect the removed “Supply” gauge to the filter regulator
to indicate regulator output pressure.

Figure 11 shows pneumatic connections for both the
4700P and 4700E Positioners.  Note that the 4700E has the
“Instrument” port sealed by a 

1

/

4

" NPT Plug.  Do not remove

plug or make any other connections to this port.

The use of a Masoneilan 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.

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 19 on page 30.

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.

DANGER: Never exceed actuator or positioner
maximum supply pressure.  Damage to equip-
ment or injury to personnel may result.