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Small Expansion Joint Type Za
Technical Data // Installation Instructions
Technical Data
Small Expansion Joint Type Za
for welding in into steel pipe
Construction characteristics
Execution with weld ends, delivered in pretensioned condition.
The main element of this small expansion joint is the multi-ply
bellows made of stainless steel. The two weld ends for welding in are made of carbon steel St 52-3. The inner protecting
sleeve is reinforced and hence also acting as a guide. The
outer robust sleeve protects the expansion joint from mechanical and environmental influences. All connections are welded.
Application field:
for taking up axial movements in heating and industry water
systems.
Diameter:
½" – 2"
For larger dimensions, axial expansion joints of type W are
used
Pressure:
Size ½" – 1 ¼" PN 16
Size 1 ½" – 2" PN 10
For higher pressures, axial expansion joints of type W are used
Materials:
Bellows element:
stainless steel 1.4571 (similar to
AISI 316 Ti)
Connecting weld ends: carbon steel St 52-3
Inner protecting sleeve: carbon steel St 35
Outer protecting sleeve: EN AW-6063 T6
Endurance:
5000 full load cycles at 25 mm stroke
(1000 full load cycles at 45 mm stroke)
Temperature resistance: up to 450°C
12-02
F-0001014
TL
BOA AG
Station-Ost 1 · CH-6023 Rothenburg · Switzerland
Phone: +41 41 289 41 11 · Fax: +41 41 289 42 02 · info@boa.ch · www.boa.ch
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