Spirax Sarco SP500 - Page 23

IM-P343-35 CTLS Issue 5
23
SP500 Electropneumatic Smart Positioner
5.2.6
Attach the positioner mounting plate to the positioner as shown in Figures 33 and 34.
5.2.7
Adjust the vertical position of the SP500 positioner and mounting plate assembly, by sliding it up or
down on the pillar style actuators, ensuring that the positioner is roughly centred on the actuator/valve
stroke (Figure 30).
Even if this is the ideal condition, it’s not mandatory. In fact, as shown in Figure 35, the only necessary
condition for correct operation is that the stroke of the magnet (dimension B) lay inside the sensor
operating linear range (dimension A), i.e. the vertical dimension marked on the case of the positioner.
5.2.8
When the SP500 positioner and mounting plate assembly is correctly positioned, tighten the hexagon
headed screw (5) on the yoke mounted actuator (Fig. 33) to 10 - 12 Nm and tighten the 'U'bolt nuts
(6) on the pillar mounted actuators (Figure 36) to 10 - 12 Nm.
Protection plate
5
Fig. 33
Attach the mounting plate
Assembled
Fig. 34
B
A
Fig. 35
SP500 positoner
6
Fig. 36