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Direct-Acting
Reverse-Acting
Figure 3
ADJUSTMENTS
SETPOINT
1. Remove cap screw.
2. Apply operating control pressure to inlet
3. Apply process pressure at desired setpoint to the
4. Insert a 5/8" hex wrench into the adjustment
5. Check operation and trim as necessary.
6. Replace the cap screw.
DIFFERENTIAL (Applicable to Auto Reset
versions only)
CAUTION: Sensor will not vent if
differential adjustment screw is turned
clockwise to its maximum insertion into the
valve housing. Do not set differential below
minimum recommended value as shown in
graphs.
1. Apply operating control pressure to inlet port
2. Cycle measured pressure at the process port and
DIM. "A"
MODEL NO.
In. (mm)
84370-A, C
.065 (1.651)
84370-B
.020 (.508)
6
through a .032" (.81 mm) diameter or smaller
orifice. Control pressure and orifice size must be
the same as that used during normal operation.
process port.
screw
and
turn
screw
(clockwise for reverse-acting units) until the
valve snaps open and sensor vents. If the valve is
already
open,
turn
(counterclockwise for reverse acting units) until
the valve closes, then reverse direction and turn
screw until valve snaps open and vents.
through a .032" (.81 mm) diameter or smaller
orifice. Control pressure and orifice size must
be the same as that used during normal
operation.
adjust the differential adjustment screw until
desired differential is obtained. Differential is
increased
by
turning
counterclockwise.
Table 3
DIM. "B"
In. (mm)
1 (25.40)
1 (25.40)
port
counterclockwise
the
screw
clockwise
the
screw
DIM. "C"
In. (mm)
.020 (.508)
.065 (1.651)
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