V-9502-91 Positioner Kit for V-3000-8001 Pneumatic Actuators Mounted to VG7000 Series Bronze Control Valves

Текст документа

V-9502-91 Positioner Kit for
          V-3000-8001 Pneumatic Actuators Mounted to
              VG7000 Series Bronze Control Valves

Note:      The positioner spring must be ordered separately. Refer to Table 1
           for the appropriate code number.

Kit Includes
•      one positioner with cover and mounting bracket
•      one feedback connector
•      one No. 8-32 x 1/4 in. flat-head mounting screw
•      one elbow barbed fitting
•      two spacers, 0.378 in. length
•      two No. 10-24 x 5/8 in. mounting screws

Tools Required
•      standard 1/4 in. blade screwdriver
•      7/16 in. open ended or adjustable wrench
•      3/16 in. Allen wrench

Table 1: Accessories
    Description                                            Code Number
    Pilot Positioner Springs:
         5/16 in. Stroke (8 mm Lift) - 3 psi Span           V-9502-6801
         1/2 in. Stroke (13 mm Lift) - 5 psi Span           V-9502-6801
         3/4 in. Stroke (19 mm Lift) - 10 psi Span          V-9502-6801
        5/16 in. Stroke (8 mm Lift) - 8 psi Span            V-9502-6802
        1/2 in. Stroke (13 mm Lift) - 12 psi Span           V-9502-6802
        3/4 in. Stroke (19 mm Lift) - 4 psi Span            V-9502-6803

© 1999 Johnson Controls, Inc.                                      Printed in U.S.A.
Part No. 14-1210-12, Rev. —                                                       1
                                Upper Spring
                                Seat

                    Flat-head
                    Screw

                Feedback
                Connector

                    Figure 1: Upper Valve Detail

    Pilot                       P

    Output                      O

    Output Hypodermic
    Needle Test Point

    Supply                      S

             Figure 2: V-9502 Positioner Air Connections

2
                         Backplate   Lever Arm

                                        Hole Furthest From Positioner Body
                                                 Feedback Spring

                                                                Feedback Connector

           Spacers
                                                               Mounting Set Screw

                      Figure 3: Actuator and Positioner Assembly

Actuator Removal
1.       Disconnect the air line attached to the actuator and cap it to prevent control
         system operation problems.
2.       Make sure that the pressure in the actuator has been relieved.
3.       Using a 1/4 in. blade screwdriver, remove the V-3000-8001 Actuator from
         the valve by loosening the mounting set screw. See Figure 3.

     !
            CAUTION:        Personal Injury Hazard. The spring under the actuator is
                            attached to the valve stem and is pre-compressed.
                            Unknown damage to the valve stem may create a
                            hazardous condition resulting in personal injury.

Mounting Procedure
1.       Referring to Figure 1, attach the feedback connector to the upper spring seat
         with flat-head screw, and using a 3/16 in. Allen wrench, tighten the screw to
         secure the assembly together.
2.       Referring to Figure 2, remove the straight barbed fitting from the actuator
         and replace it with the elbow barbed fitting provided.
3.       Using the two No. 10-24 x 5/8 in. mounting screws and the two 0.378 in.
         spacers provided, mount the positioner to the actuator using the two lower
         mounting slots of the positioner backplate (as illustrated in Figure 3). Do not
         tighten the screws at this time.

                                                                                          3
4.   Place the actuator over the valve spring assembly and feedback connector.
     Using a 1/4 in. blade screwdriver, tighten the mounting set screw against the
     valve bonnet.
5.   Rotate the feedback connector and align it with the hole on the lever arm
     that is furthest from the positioner body (as illustrated in Figure 3).
6.   Referring to Figure 3, attach one end of the feedback spring to the first hole
     in the positioner lever arm, and attach the other end of the feedback spring
     to the feedback connector.
7.   Slide the positioner up until the spring is just snug. Securely tighten the
     screws identified in Step 3 using a 1/4 in. blade screwdriver.
8.   Referring to Figure 2, connect the 20 psig (138 kPa) supply to the Supply “S”
     port and the control signal to the Pilot “P” port.
9.   Adjust the positioner starting point to suit the application. The operating span
     is determined by the type of spring used; refer to Table 1 for list of springs
     and associated spans. Refer to the V-9502 Pneumatic Valve Actuator
     Positioner Product Bulletin (LIT-977265) found in the Valve and Actuator
     Manual (FAN 977) for the starting point adjustment procedure.

4

Позиції каталогу з цим документом

• V-9502-6801 — Пружина пилота
• V-9502-6802 — Пружина пилота
• V-9502-6803 — Позиционер PILOT V-3000

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