ABB PME120-AN Manuale di istruzioni - Pagina 6

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8.4 Mounting the Actuator to the Valve

8.4.1 Preparing the Equipment

- Make sure that the shaft and lever bore surface are clean and free of grease.

- Determine the length of the stay tube (not included in the scope of delivery).

- Move the valve to the "CLOSED" position.

- Move the actuator to the corresponding end position using the handwheel. Observe the permissible

angle.

- Spacing "L" minus 140 mm yields the required length of the link tube.

- Drill a cone bore into the valve lever for mounting the second ball-and-socket joint, as shown in

Figure 4.

- Insert the ball-and-socket joint, secure with crown nut and split-pin.

- Remove the welding bushings and weld them to the stay tube (C 15 to DIN 17210)

- Insert the link rod between the two ball-and-socket joints and screw it in.

- If required adjust "L" by turning the link rod.

- When all adjustment steps are finished, fasten the counter nuts.

8.4.2 Adjusting the Stops in Dependence of the Travel

- Move the output lever / valve to the position requiring fine adjustment.

- Put the stop onto the toothing as close to the output lever as possible and fasten with screws.

- Move the output lever towards the stop using the handwheel; turn the coupling rod for fine adjust-

ment.

- Fasten the counter nuts.

- Fasten the stop in the other mounting position close to the end position, depending on the toothing.

8.4.3 Adjusting the Stops in Dependence of the Torque

- First proceed as described above for travel-dependent adjustment.

- Prior to re-fastening the counter-nut lock the handwheel and then turn the coupling rod in such a

way that an initial tension occurs in the valve's closing position.

- Fasten the counter-nuts.

rigid, vibration-free

support

Fig. 2: Mounting PME 120, example

α ≥ 15 °

according to dimensions specified by the valve manufacturer

tightening torque

for limit stop screws: 46 Nm

echanical

limit stop

coupling

flap

lever

tightening torque for

lever clamping screw:

23 Nm

lever

boring diameter for

fastening screws: 12 mm

tensile strength:

≥ 400 Nm

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