ABB LME620-AN Instructions Manual - Page 6

Browse online or download pdf Instructions Manual for Controller ABB LME620-AN. ABB LME620-AN 15 pages. Electrical linear actuators for continuous modulating control

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thrust rod

mech. position

indicator

Figure 2: Mounting LME 620, example

7.3.1

Valve Design Requirements

- Consider the end position forces (up to 2.5 x rated force) when designing the valve.

7.4 Mounting the Actuator to the Valve

- Completely retract the actuator thrust rod and put the actuator on the valve yoke.

- Make sure the valve stem is centrically aligned with the bore and at right angles to

the actuator seat (permissible parallel deviation < 0.1 mm referred to total stroke).

- Fasten the actuator to the yoke with screws of property class 8.8 (tensile strength

800 N|mm

; yield strength 640 N/mm

- Use the handhweel to extend the thrust rod, link the rod with the valve stem via the

clutch.

- Manually retract the thrust rod to check whether or not the external stop of the ac-

tuator is on the housing flange before the valve cone gets in touch with the cover.

- If required, adjust with the clutch (only possible within certain limits!)

fastening scrrews

external limit stop

coupling

valve stem

valve yoke

valve

)

(r00018x1)