Hello, I'm Kyle and today I'm gonna be showing you how to change out the trim
on a 2" high pressure control valve. Before we get started, be sure to
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Some of the reasons you might be doing this are because
you have changing flow rates or pressures, or you have worn out trim.
The first thing you want to do is make sure that the valve is completely
isolated and has no pressure on the body. You can make all of these changes
without taking the valve body out of line. When making these changes,
be sure to follow your company's safety regulations. The first thing we want to
do is take off the adjusting screw. Then undo the bolts on the coupling block.
Next, take off the four body bolts holding on the topworks. You can now separate the
topworks from the body. Now you can remove the stuffing box.
When removing the stuffing box you may hear a hissing noise. This hiss is coming from the
communication hole in the stuffing box which is alerting you that there's still
pressure in the valve body. You need to stop work, locate and fix the leak in order to depressurize the valve.
This whole piece should come out as one assembly.
If it doesn't, you can use the camera seat removal tool.
This tool threads directly onto the seat for easy removal.
It's best to do this next part in a vise if you have one available on location.
Clamp on the flats of the stuffing box to remove the seat. Loosen the cage to
take the spring tension off of the packing.
This will prevent tearing the packing and make removal and reinstallation easier.
Now you can take out the ball and stem. With the old one out, you can install the new trim.
Be sure to add grease to the stem before installing.
When inserting the stem push it all the way down into the cage this will prevent the
ball from damaging the seat.
Retighten the cage.
Grease the o-ring on the new seat.
Now it's ready to be installed back into the body. At this point, you can put the
topworks back. Start the body bolts but don't tighten them all the way.
Switch out the travel indicator for the new trim size. Now you can put the coupling
block back on. Now that the coupling block is back on, tighten the body bolts
down all the way. Last thing to do is to tighten down the adjusting screw.
Now that you've changed the trim size in your control valve it's ready to handle
your new flow conditions. Thanks for watching! If you'd like more information
about Kimray products, contact your local Kimray representative or visit Kimray.com