Page 35 - Design Criteria.qxd

36 ® Welcome to the Next Generation of Sealing Technology
Weld Gaskets
Another gasket concept with origins from the German industrial market are weld gaskets. As standard, two
variants exist; Weld Membrane Gaskets in accordance with DIN 2695 and Weld Ring gaskets.
Weld Membrane Gaskets
The Weld Membrane Gasket consists of two similar rings each of 0.157” (4mm) thickness. For chemical com-
patibility and in order to ensure controlled thermal conductivity and weld compatibility, the gasket material
must always be the same as the flange material. Each ring is individually welded to its mating flange. Upon
flange assembly, a second welding operation joins the two rings at their outer diameter which provides for a
fully welded joint.
15° 30°
R5
R2.5
3
1.2 t
d 1
10
d 2
5
80°
d 1
d 2
4
Single Seal Ring
10
5
d 1
t
d 2
Style SR Style SRL
Weld Ring Gaskets
As with Weld Membrane Gaskets, Weld Ring Gaskets are used in pairs. As standard, each ring is manufac-
tured to similar materials to that of the flange, thus ensuring full compatibility. All welding is conducted on
the outside of the gasket and flange, thus ensuring ease of location, especially in restricted applications where
space is limited. Two styles exist, Style SR and Style SRL. Style SRL is recommended when there is flange
differential radial expansion.
Wire ring serves as
welding aid (sealing
of lip space against
penetration of
condensate.
R1.5
4
4
R = 40
R = 40
20°
d 2
d 3
d 1