Metallic Expansion Joints in Taiwan

JF-250 Series - Bellows Type Expansion Joints (Flanged Ends)
One-ply bellows welded to pipe nipples and flanges, with internal sleeve & tie-rods (optional). Designed to absorb axial movement of low/ medium pressure/ temperature pipeline.

JF-250 Series
Size Range	DN15 ~ DN600 (1/2” ~ 24”)
Pressure/ Temperature rating	10 kg/cm² at 120℃
Cycle Life	Nc ＞ 1,000 times

Construction

No.	Parts	Material	Option
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	Tube Ends	Carbon Steel	S.S.304/ S.S.316
5	Tie Rods	Carbon Steel	S.S.304/ S.S.316

Specification (Fitted with JIS 10K flanges）

Size		OAL	Thickness of Flange	Bellows Length	Axial Movement	Axial Spring Rate	Effective Area
mm	ins	mm	mm	mm	mm	N/mm	cm²
15	1/2	250	12	125	+10 -25	8	4
20	3/4	250	14	125	+10 -25	11	6
25	1	250	14	125	+10 -25	17	9
32	1 1/4	350	16	180	+10 -40	18	13
40	1 1/2	350	16	180	+10 -40	23	21
50	2	350	16	180	+10 -40	29	32
65	2 1/2	350	18	180	+10 -40	46	50
80	3	350	18	180	+10 -40	53	67
100	4	350	18	180	+10 -40	76	123
125	5	350	20	180	+10 -40	81	177
150	6	350	22	180	+10 -40	116	259
200	8	350	22	180	+10 -40	137	415
250	10	350	24	180	+10 -40	194	661
300	12	350	24	180	+10 -40	218	907
350	14	350	26	180	+10 -40	369	1167
400	16	350	28	180	+10 -40	465	1509
450	18	350	30	180	+10 -40	518	1880
500	20	350	30	180	+10 -40	819	2326
550	22	350	32	180	+10 -40	895	2781
600	24	350	32	180	+10 -40	971	3276

※Other size, pressure, axial movement, material are available on request

JF-250 Series