Edition le 06/06/06
Révision le 17/07/2014
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Swing the spectacle plate out of the way and maintain it to extract seal carrier, seal and cam.
For slide spectacle plate
Extract completely the spectacle plate by remove the stop Clean et brush cam with grease.
To re-assembly, replace the actuator on the stationary cam with the actuator arm between the stem discs for tye
750. Push the seal carrier down onto the actuator making sure that the inner seal ring is not pinched.
On high temperature applications the parts indicated above should be lubricated each time the plate is swung.
4 - RECOMMENDED SPARE PARTS
It is recommended that a complete set of seals be kept on hand since these parts are the most likely to become damaged.
5 –MAINTENANCE
5.1 - REPLACEMENT OF THE SEALS WITH THE VALVE INSTALLED
5.1.1 –Seal on body
•Retract the CAM SET mechanism by turning the stem fully counter-clockwise.
•Put the turning spectacle plate at 90° or extract completely the slide spectacle plate, see §3.1 Slide the
seal carrier of the end of the body pipe and remove it from the valve.
•Remove the inner pipe seal.
•Pry the primary seals out of the carrier and the body half, using a suitable tool such as a small
screwdriver.
•To install new seal in position , use a non aggressive tool like wood part.
•Install new pipe seal. ( It is interesting to grease cam).
•Install the carrier on the body pipe.
•Swing the spectacle plate into position or replace the slide spectacle plate and close the CAM SET
mechanism to fully seat the seals.
5.1.2 –Seals in spectacle plate
•Seals in the spectacle plate may be replaced in a similar manner by removing the stud holding the plate
and removing it from the assembly for bench replacement of the seals.
5.2 - DISASSEMBLY OF THE VALVE
IF line blind valve is disassemble the guarantee is cancelled.
•Open the valve and remove it from the line if possible.
•Grind off the nut tack welds, remove the top stud, and remove the spectacle plate to prevent damage to the
sealing surfaces.
•Lift off the body half which does not contain the CAM SET mechanism.
•Remove the carrier, pipe and actuator.
•If the stem is to be removed (See REPLACEMENT OF THE STEM ASSEMBLY) Drive out the spring
pins and remove the discs and stem.
•Clean and lubricate all parts.
•Install news seals. (See REPLACEMENT OF THE SEALS)
•Torque the stud nuts as indicated in the table 02 of stud sizes.
•Tack welds all body stud nuts to the studs.
