GESTRA Gestramat CW 41, Original Installation Instructions

Page: 27 / 40

27
Installing the double cone
Attention!
Equipment may leak if the gasket is
damaged.
 Replace all gaskets that you loosen
during your work.

Use only new gaskets of the same
type.
Attention!
Dirt deposits on gasket seating surfaces
may result in leaking of the equipment.
 Clean seating surfaces before
inserting a new gasket.

Replace all gaskets with new ones of the same
type.
To install the double cone in the body, proceed as
follows:

Screw the adjusting key completely out of the
body.
Models with r-cone are equipped with an
additional O-ring on the double cone. You
must also replace this O-ring before
installing the double cone.

Remove the old O-ring.

Dispose of the O-ring in accordance with
regulations at the location of use.

Insert a new O-ring in the double cone from
underneath.
 Push the new O-ring up until it is lying against
the collar of the double cone.
You can now install the double cone in the body.

Insert the double cone in the body with the
opening facing downwards.
 Position the spring on the double cone.
 Fit a new body gasket on the four setscrews on
the body opening.

Lubricate all threads and the contact surfaces of
nuts and bolts with temperature-resistant
lubricant.
The lubricant must have the same properties as
OKS
® 217.

Mount the lid on the four setscrews on the body
opening.
 Press the lid down sufficiently far to allow the
hex nuts to fit onto the setscrews.
 Tighten the hex nuts crosswise,

making sure that the lid and hex nuts do not
become crooked.
The torque required to secure the hex nuts varies
depending on type:

For models with DN25, DN40 and DN50, a
torque of 15 Nm is required.

For models with DN80 and DN100, a torque of
25 Nm is required.
 Tighten the hex nuts crosswise to the specified
torque.
 Set the cooling-water outlet temperature as
described on page 15.

Set the bleed flow as described on page 17.