23
Replacing the stage plunger and nozzle insert
You require the following tools to replace the stage
plunger and nozzle insert:
Combination wrench to DIN 3113, type B (size
11, 17, 18, 19 or 24, depending on equipment
type)
Torque wrench to DIN ISO 6789
Temperature-resistant lubricant is required for
lubricating the system. The lubricant must have the
same properties as OKS 217.
Allen key to DIN ISO 2936 (size 6 or 10,
depending on equipment type)
Screwdriver
Remove the lid, as described on page 21.
The stage plunger is fastened to the
spindle by one or two threaded pins.
GK 11, DN150 steam traps have two
threaded pins. The other types have one
threaded pin.
Remove the threaded pins (23) from the stage
plunger (5).
Completely unscrew the stage plunger from the
spindle (28).
Position the new stage plunger on the spindle
such that the two holes for the threaded pins
are one above the other.
By hand, screw the threaded pins into the holes.
Remove the collar screw (29).
Remove the sealing ring (20) of the collar screw.
Lift the nozzle insert (22) out of the body.
Lift the seal (21) for the nozzle insert out of the
body.
Check all removed parts for signs of damage.
Replace all worn or damaged parts.
Clean all dirty parts.
The gaskets of the equipment must be replaced
in any case.
Insert the new sea for the nozzle insert into the
body.
Insert the new nozzle insert in the body.
Insert the new sealing ring of the collar screw in
the body.
Screw the collar screw into the body.
