Baker Hughes Masoneilan SVIII AP, Installation And Maintenance Manual, Page: 44 / 204

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Mounting the SVI II AP on Reciprocating Valves
This section describes the procedure for mounting the SVI II AP on Reciprocating Valves (using
Masoneilan’s 87
⁄ 88 Multi-Spring actuators as an example).
Tools required:
7 ⁄ 16" Combination Wrench (2 required)
3 ⁄ 8" Combination Wrench
1 ⁄ 2" Combination Wrench
Phillips Head Screw Driver
4, 5 mm Hex Key Wrench
Mounting the SVI II AP on a Reciprocating Actuator
1. Ensure that the lever is pinned to the magnet assembly and held securely by an M5 flat
head screw to ensure that the magnet axis is vertical when the lever is in the valve closed
position. Tighten the lever screw securely.
2. Mount the SVI II AP reciprocating mounting bracket to the actuator using two (2) 5 ⁄ 16 - 18
UNC cap screws. The mounting location of the bracket depends on the size and stroke of
the actuator. Refer to Figure 16 on page 45 and Figure 6 on page 46.
3. Select mounting hole A, B, C or D for the stroke of the valve. For example, hole B is shown
in Figure 17 on page 45 for a size 10 actuator with 1.0" stroke. Unless otherwise specified,
the SVI II AP 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. 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.
5. Thread the take-off rod to the actuator stem connector. Refer to Figure 18 on page 47.
Ensure that the travel pointer located on the coupling is correctly positioned.
6. Attach the right hand threaded rod end to the SVI II AP 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 17 on page 45 and the Reciprocating Valve Linkage Selection,
Table 6 on page 46.
7. 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 46.).
8. 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.
9. 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.
10. Thread the turnbuckle onto the left hand threaded rod end. Refer to Figure 18 on page 47.