wT 2860/02
Page 16
In order to guarantee the centered orientation of the ball, a trunnion is located on the
opposite site. Guided into the vertical bore of the ball by a bearing bush, it is locked in
place by a hex screw to counter forces generated within the body. Tightness to
atmosphere is achieved through flat gaskets and O-rings.
In the standard design, the connection between the body and the end piece is sealed by
means of a static O-ring (Fig. 6a). A spiral wound gasket (Fig. 6b) is utilized for the high-
temperature design. The parts are held together by a bolted connection, i.e. the flanges
are pressed against each other across their entire surface. This serves to absorb the
occurring tensile and bending forces.
All seals and bearings are MAINTENANCE-FREE
Cushion joints
Circlip
Ball
Bearing bush
O-Ring static
Trunnion
Stud bolt
O-ring for DN 700, 800, 1000
PN 25/40
Hex nut
End piece
Body
Metallic gasket
Fig. 6a
Spiral wound
gasket
Fig. 6b
