Danfoss Shut-off Мalve SVA-L

Warning: This procedure is for sizes DN 80-200 only

If the backseat seal is damaged, it must be replaced.

Has the spindle been screwed out of the bonnet?

Has the original backseat seal been carefully removed?

Has a new backseat seal been mounted in the angled contact surface directly inside the opening in the bonnet?

Has any dirt been removed from the body before the valve is assembled?

Has the cone been screwed back towards the bonnet before it is replaced in the valve body?

Enter the torque wrench tightening value for the bonnet

Warning: Do not remove the packing gland if there is internal pressure in the valve.

Attach a handwheel or similar on top of the spindle for pressure equalization.

Handwheel and packing gland can now be removed.

Is the valve still under pressure?

Do not remove the bonnet while the valve is still under pressure.

Is the flat gasket (pos. A) damaged?

Is the spindle free of scratches and impact marks?

Warning: This procedure requires trained personnel with PPE!

Unscrew the cone screw (pos. B) with an Allen key

Compress the disk spring (pos. D) and remove the balls (pos. C)

Place the new cone on the spindle

Place the disk spring (pos. D) between the spindle and the cone

Compress the disk spring and replace the balls (pos. C)