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2. Specific maintenance instructions
Under normal circumstances, maintenance jobs may be limited to the sealing elements of the drive shaft and
2.1
Dismantling and replacing sealing rings
• Use the electric drive to move the valve sleeve to the "UP" position. (Limit switch "UP"
• Remove screws /bolts (37) to dismount the rotary drive + cover (5).
Mark the position of the drive shaft (3) with a view to the final control element (16) and in
Note
relation to the feather key (2) and position of plate (53). (Important during re-assembly.)
• Loosen the cylinder screw in adjusting nut (4) and remove the nut.
• Remove the cylinder screws (7).
• Remove the plate (52) from housing (16) by screwing in two 2 M10 eye bolts.
• After you removed the cylinder screws (56), pull bush (58) out of plate (53).
• Replace the sealing ring (54). Consider the proper mounting position when fitting: The coil spring must point in the
direction of the pressure side.
• Dismantle the device from the system and place it on its inlet flange. Remove the cylinder screws (29) and pull out
the outlet device (34) towards the top.
• Discard the O rings (28 + 45) and put in new ones.
• Loosen the M4 clamping bolts in adjusting nut (41) and remove the nut. Remove the valve sleeve (40).
Use two M8 eye bolts to pull it out of the device.
• Loosen screws / bolts (47) and remove ring segment (32). Discard seal elements (43+ 44) and place new ones.
• Remove release sleeve (38). Use two M6 eye bolts to pull it out of the device. Discard the O ring (64),
compensating ring (62), guide ring (61) and sealing ring (63) cpl. with support ring (60). Use new ones.
Clean the grease chamber (48) and fill with new lubricant (48).
Note
• Loosen the cylinder screws (25) in bush 2 (26), and pull out bush 2. Remove and clean the feather key (24).
• Screw out the cylinder screws (20) and pull out bush 1 (22). Remove the spindle (23).
2.2
Checking components, assembly
Clean ALL the components. Find and grease all components mentioned in lubricant table 2.4 before you put
them back in. Grease ALL screws + bolts before you put them back in. Consult table 2.5 for tightening
torques M
.
A
Caution
!
• Insert spindle (23) into rotary drive (15). Screw down bush 1 (22) onto rotary drive. Place feather key (24)
into the groove on spindle (23). Place bush 2 (26) on top. Use the cylinder screws (25) and safety washers (27)
to tighten everything.
Turn drive shaft (3) to move the spindle (23) up and/ or down all the way to the mark.
Note
The marks on the axle (3) and plate (53) must match.
530.24 p.04
Check the thread and feather key groove of spindle (23): Worn?
– The spindle must screw easily into the rotary drive.
– Lubricate the spindle (23), internal thread of the rotary drive (15), feather key (24)
and key-feather groove generously.
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