5 spare parts – Flowserve LPS Pneumatic Heavy-Duty Actuator Series User Manual
Page 24
LPS Series Heavy-Duty Actuators FCD LFENIM0001-02-AQ – 5/15
24
* Standard maintenance spare parts for on/off applications
X Spare parts that can be replaced
• Spare parts that can be replaced without removing the actuator from the valve
1 Only in double acting actuators
Num Description
Qty Spare Parts*
Num Description
Qty Spare Parts*
35 Bushing
2
48
Guide Block
1
36 Scotch Yoke
1
49
Bushing
2
37 Slider Block
2
50
Guide Bar
1
38 O-Ring
2
X •
51
Scotch Yoke Housing
1
39 O-Ring
2
X •
52
Center Ring
2
40 Guide Pin
1
53
Grub Screw
3
41 Stud
4
54
Cylinder Adapter
1
42 Eyebolt
4
55
Spring Adapter
1
43 Hex Nut (High)
4
56
Hex Nut (High)
8
44 Hex Head Shoulder Bolt 11
57
Studs
8
45 Hex Head Screw
2
58
1
Guide Adaptor Pin
1
46 Cover
1
59
1
Hex Head Screw
1
47 Cover Gasket
1
X •
4.4.1
Remove the position indicators or other accessories, if fitted.
Remove the cover (46) from the Scotch yoke by unscrewing
all the locking components: hex screw (45), hex head shoulder
bolts (44) and eyebolts (42) plus upper nuts (43). Leave the
studs (41) screwed into the Scotch yoke housing (51). Remove
the worn internal O-ring (39) of the bushing (35) inserted in the
cover (46). Clean the O-ring groove and the sliding area of the
bushing and after having brushed these surfaces with a light oil
film, install the new internal O-ring (39).
4.4.2
Apply a generous layer of grease on the sliding surfaces of the accessible moving parts inside the housing.
In particular, grease the guide bar (50) and the surfaces of the slots of the wings of the Scotch yoke (36), in
which the slider blocks (37) run. Reposition the cover, taking care to replace the cover gasket (47).
The LPS actuator is designed for easy on-site maintenance and increased actuator life cycle. For this reason, specific
instructions and equipment were created to allow the replacement of all parts of the Scotch yoke without removing the
actuator from the valve. For these instructions, contact Flowserve.
NOTE: The spring can and pneumatic cylinder must be removed before disassembling the Scotch yoke housing.
4.5 Spare Parts
The main spare parts and the interval time for standard ON/OFF applications are listed in the table below. Maintenance
for standard ON/OFF applications is required after 1800 cycles and/or after six years of usage, whichever occurs first.
To obtain spare parts lists specific for each job/order, please contact your Flowserve Limitorque representative.
Part numbers are referred to in Figures 26 and 27
.
Number
Description
Qty
Maintenance
Interval Times
23
Tape Guide
2
6 years
1800 Cycles
28
O-Ring
2
29
O-Ring
2
33
O-Ring
1
38
O-Ring
2
39
O-Ring
2
47
Cover Gasket
1
Table 1: Spare Parts List for Standard ON/OFF Applications
a
WARNING: It is recommended to follow the regular maintenance interval times suggested in the previous table.
CW/CCW Conversion Kit Sample
Num Description
Qty Spare
Parts*
49
Bushing
2
54
Cylinder Adapter
1
55
Spring Adapter
1
56
Hex Nut (High)
8
57
Studs
8