Reciprocating Linkage - GE Masoneilan SVI II ESD Installation And Maintenance Manual

3. Select mounting hole A, B, C or D for the stroke of the valve. For example, hole B is shown
in Figure 46 on page 66 for a size 10 actuator with 1.0" stroke. Unless otherwise specified,
the SVI II ESD mounting assumes that the actuator is in the normal upright position. The
mounting hole in the slotted opening of the mounting bracket must be left when facing
the actuator, with the actuator in the upright position.
4. Thread the take-off rod to the actuator stem connector. Refer to Figure 47. Ensure that the
travel pointer located on the coupling is correctly positioned.
5. Attach the right hand threaded rod end to the SVI II ESD lever using a 1⁄4 - 20 x 1" cap
screw and nut as shown. The lever hole position to be used depends upon the specific
valve stroke. Refer to Figure 47 on page 67 and the Reciprocating Valve Linkage Selection,
Table 6 on page 68.
6. Thread the right hand lock nut and turnbuckle onto the right hand rod end approximately
two turns. Turnbuckle length is a function of actuator size. (Refer to Table 6 on page 68.)
7. Secure the magnet housing assembly, including the lever and right hand rod end, to the
bracket using four M5 X 10 mm flat head screws.
8. Attach the left hand threaded rod end to the take-off rod with 1⁄4 - 20 UNC nut and thread
the left hand lock nut onto the rod end.
9. Move the valve to its closed position. For air to extend, this requires using air pressure in
the actuator to fully stroke the actuator. For air to retract, actuators vent the actuator of
air pressure.
10. Thread the turnbuckle onto the left hand threaded rod end. Refer to Figure 47.
11. Adjust the turnbuckle until the hole in the SVI II ESD lever is aligned with the indicating
hole in the bracket. Tighten both turnbuckle lock nuts. Refer to Figure 47.
12. For reciprocating valves the adjustable link turnbuckle must be parallel to the valve stem.
To ensure linearity in positioning, verify that the hole in the lever aligns with the indicating
hole in the bracket when the valve is in the closed position. Check that the bracket is
mounted using the proper holes. (Refer Table 6 on page 68.).
13. Mount the SVI II ESD to the bracket and secure with four M6 socket head cap screws.
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Figure 47 Reciprocating Linkage
Masoneilan SVI II ESD Installation and Maintenance Manual
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