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Join Force Bellows Co. Ltd.
Axial Expansion Joint





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Item Number.:
JF-250STG
Product Name:
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.
 
 
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