Limitorque Intrusive Multi Turn Actuator L120-20

Warning: The L120 series actuators have a totally sealed gear case, factory lubricated with grease

The gear case can be mounted in any position

Avoid mounting positions that would result in the operator area being saturated with lubricant if the seal fails

No seal can remain absolutely tight at all times. Therefore, it is not unusual to find a very small amount of weeping around shaft seals - especially during long periods of idleness such as storage

Is there any weeping around shaft seals?

Using grease minimizes this condition as much as possible. If a small amount is weeping at start-up, remove it with a clean cloth

Was the weeping removed with a clean cloth?

Once the equipment is operating on a regular basis, the weeping should stop

Sign off on the gear case lubrication

NOTE: This section is only applicable to thrust base applications.

WARNING: Possible Hazardous Voltage. Turn power OFF before disassembling or removing the actuator from the mounting base.

WARNING: Potential High Pressure Vessel. Before removing or disassembling the actuator, ensure that the valve or other actuated device is isolated and not under pressure.

Disconnect all incoming power to the actuator

Remove Seal Retainer (piece #102 of Figure 10) followed by stem nut, bearings, and seals

Check the fit of the new stem nut on the valve stem - ensure that the nut travels freely without binding

Reassemble the thrust base and remount the actuator on the valve

Remount the actuator on the thrust base

Warning: This inspection requires trained personnel with PPE!

Inspect Limitorque L120 series actuators for correct lubrication prior to operating

Note: Each application has its own effect on the actuator and the frequency of these inspections should be based on the application and the operating experience

The following lubrication inspection schedule is recommended until operating experience indicates otherwise.

For Gear Case, inspect lubrication every 18 months or 500 cycles, whichever occurs first

Sign off on the Gear Case Lubrication Inspection