JOIN FORCE Bellows Co. Ltd

Product

Expansion Joints
Axial Expansion Joint

JF-250STG

Axial Expansion Joint

Description
This is a Screw Ends Axial Expansion Joint with good quality and competitive price.
In addition to Screw Ends Axial Expansion Joint, we also supply Weld Ends Expansion Joint with superior quality.
Features
JF-250 series(Screw Ends) Axial Expansion Joints
One-ply bellows welded to screw ends, with internal sleeve; tie-rods and external covers are optional.
Designed to absorb axial movement of medium and/or low pressure/temperature pipeline.


Axial Expansion Joints – JF-250 series(Screw Ends)
Size Range DN15 ~ DN100 (1/2” ~ 4”)
Pressure/Temperature rating 10bars at 120℃
Cycle Life Nc > 1,000 times

Construction

No. Parts 250ST 250STC 250STG 250STGC Standard Material Optional Material
1 Bellows S.S.304 S.S.316
2 Internal Sleeve S.S.304 S.S.316
3 Flange Carbon Steel S.S.304/S.S.316
4 Tie Rods Carbon Steel S.S.304/S.S.316
5 Lugs Carbon Steel S.S.304/S.S.316
6 External Covers Carbon Steel S.S.304/S.S.316


Specification
Size OAL Thickness of Weld Ends Axial Movement Axial Spring Rate Effective Area
250ST 250STC 250STG
mm ins mm mm mm mm mm N/mm cm2
15 1/2 250 300 350 2.8 +10 -25 13 4
20 3/4 250 300 350 2.9 +10 -25 19 6
25 1 250 300 350 3.2 +10 -25 28 9
32 1 1/4 350 400 450 3.5 +10 -40 18 13
40 1 1/2 350 400 450 3.5 +10 -40 22 21
50 2 350 400 450 3.8 +10 -40 29 32
65 2 1/2 350 400 450 4.2 +10 -40 46 50
80 3 350 400 450 4.2 +10 -40 53 67
100 4 350 400 450 4.5 +10 -40 76 123
※Other size, pressure rating, axial movement, and material are available on request.
History
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