wT 2575/11
Page
4
MODE OF OPERATION
The sealing system of the bore consists of:
-
A pre-stressed elastic sealing element made of stainless and acid resistant steel with a
KFC-sealing ring (Standard) and a U-Sleeve made of K-Flon located at the pitch of the body
and the flange end piece.
-
An inelastic sealing ring located in a chambered groove in the body
-
The ball between sealing element and sealing ring
Basically KLINGER Ballostar
®
KHE ball valves can be pressurized in both directions. In consequence of
the different design of the two sealing components two operating conditions depending on the mounting
direction are possible:
1.) The elastic sealing element respective the flange end piece is mounted upstream:
The fluid pressure presses the ball against the downstream located sealing ring. At the same time, the
upstream located sealing element is pressed against the ball. Because of the elasticity of the KLINGER
sealing system
two sealing areas
are
permanently
available in the bore.
For standard applications KLINGER recommends this situation of installation as
preferred mounting
direction
. This recommended direction is additionally marked with an arrow on the valve body.
Occurring forces:
F1…Fluid force acting on ball
F2…Fluid force acting on
sealing element
Fv…Spring force of sealing
element
F1+F2+Fv…Total force, which
acts onto the sealing ring
