MP8000 Series Actuated Valves with V-9502-95 Pneumatic Valve Actuator Positioner Installation Instructions 3
Refer to Figures 1 and 2, and mount the V-9502-95
Pneumatic Valve Actuator Positioner to an
MP8000 Series Valve Actuator using the
MP8000-6002 Positioner Mounting Kit as follows:
1. Disconnect the supply air to the MP8000 Series
Actuator.
2. Loosen the cover screw on the V-9502-95
Positioner and remove the cover.
3. Locate the side of the actuator yoke that has two
circular holes.
4. Insert the two yoke bushings into the circular
holes from the inside of the actuator yoke.
5. Secure the V-9502-95 Positioner to the side of
the actuator yoke using the two No. 8-32 taptite
screws and two yoke bushings.
Note: Be certain to orient the V-9502-95 Positioner
so that the 5/8 in. (16 mm) taptite screw is closest to
the MP8000 Series Actuator, and the 1-1/4 in. (32 mm)
taptite screw is closest to the valve body.
6. Secure the connector arm to the connector
bracket using the two No. 6-32 x 1/4 in. (6 mm)
taptite screws.
7. Install the connector arm and connector bracket
assembly onto the valve stem, between the
actuator stem connector and the upper jam nut.
Note: The connector arm should be positioned
below and parallel to the positioner operating span
lever arm.
8. Select the appropriate color-coded spring for the
required valve stroke. Refer to Table 1 for the
color-coded stroke designations.
9. Install one end of the spring into the positioner
operating span lever arm. Initially, install the
spring into the seventh hole on the positioner
operating span lever arm. This hole represents an
operating span of approximately 4 psi (28 kPa).
Note: The hole closest to the V-9502-95 Positioner
represents the first hole in the series.
10. Install the other end of the color-coded spring into
the appropriate hole in the connector arm that
allows the spring to be positioned parallel to the
V-9502-95 Positioner body.
11. Loosen the two No. 6-32 taptite screws that
secure the connector arm to the connector
bracket, and reposition the connector arm until
the color-coded spring is just taut but not
stretched.
12. Tighten the two No. 6-32 taptite screws to secure
the connector arm to the connector bracket.
13. Connect the pneumatic input signal to the Pilot P
port of the V-9502-95 Positioner.
14. Use the 12 in. (305 mm) length of black plastic
tubing included in the MP8000-6002 Kit to
connect the Output Oport of the V-9502-95
Positioner to the input of the MP8000 Series
Actuator.
15. Connect a nominal 20 psig (138 kPa) supply
pressure to the Supply Sport of the V-9502-95
Positioner.
16. Commission the V-9502-95 Positioner as outlined
in the Setup and Adjustments section. If the
V-9502-95 Positioner will be commissioned at a
later time, re-install the positioner cover and
tighten the cover screw.
Setup and Adjustments
3 psi (21 kPa)
Span
Operating
Span
Selection Positioner
Operating
Span
Lever Arm
13 psi (90 kPa)
Span
Starting Point
Adjusting Screw
Figure 3: Setting Up the
V-9502-95 Positioner for Operation
The following procedure is a typical example of how a
V-9502-95 Pneumatic Valve Actuator Positioner is
used to adjust the operating spring range and change
the operating span of an MP8000 Series actuated
valve assembly.
Assume that the MP8000 Series Actuator has an
operating spring range of 4 to 8 psig (28 to 55 kPa)
resulting in an operating span of 4 psi (28 kPa), and
that it is desirable to obtain an operating spring range
of 3 to 8 psig (21 to 55 kPa) resulting in an operating
span of 5 psi (34 kPa).
