Flowserve LPS Pneumatic Heavy-Duty Actuator Series - Manual (Page 20)

LPS Series Heavy-Duty Actuators FCD LFENIM0001-02-AQ – 5/15
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4.1 General Disassembly Instructions
The LPS Series actuator is available in two different configurations, single acting and double acting, composed by the
main parts shown in Figure 23.
4.1.1 Disconnect all air and electrical supplies from actuator;
4.1.2 Before dismounting the actuator remove all accessories from actuator;
4.1.3 The reference drawings for the instructions reported in the following paragraphs are the exploded views of
single acting and double acting actuators, included as Figures 24, 25, 26 and 27.
4.2 Spring Container Maintenance
The spring container does not require maintenance. Lubrication of internal parts is carried out during assembly and is
not necessary during the normal life of the actuator. The substitution of the spring container is not expected over the
entire actuator life. However, accidental events may result in damage to this component. In these cases, proceed as
described in the following steps.
The spring container is a single welded module. In case of damage, the whole container must be disassembled from the
actuator and replaced with a new one equal to the original.
The removal of the spring container from the actuator has to be performed through the following steps. The reference
drawing is Figure 24.
a WARNING: Ensure that the pneumatic connection ports of the cylinder are disconnected. Also make sure that all
pneumatic supplies to the control unit and all power supplies are disconnected. Finally, make sure that the actuator
is in the fail safe position.
Figure 23: Single Acting Actuator
Spring Can
Housing
Pneumatic Cylinder
Stop Bolt