Pressure balanced expansion joint

[Name]: Pressure balanced expansion joint
[PN]: 0.6-2.5Mpa
[Medium]: Air, water, seawater, oil, slurry, weak acid, alkali, etc.
[Material]: SS304, 316, Q235 etc.
[Certification]: ISO9001:2008
[Specification]: JDZ model

Overview

They can accommodate axial and lateral movements where anchoring of the pipe system is difficult or impractical due to structural or economic considerations. Pressure Balanced Expansion Joints do not transfer the internal pressure thrust on to the fix points, adjacent equipment, or structures. Fix points are usually not required, only guides can ensure the turning of thermal expansion into a controlled movement. Therefore, Pressure Balanced Expansion Joints can offer signiﬁcant advantages, where pipe systems are connected with turbines, pumps, valves or other equipment, that are unable to withstand pressure thrust loads. Although Pressure Balanced Expansion Joints eliminate pressure thrust, it’s important to note that the existing load on the surrounding equipment is the total sum of the spring rates of both the flow bellows and balancing bellows.

Features

Absorbs movement, primarily axial, but may include small amounts of lateral and/or angular movement.
Use of controlling members, typically tie rods, is required to cancel the bellows pressure thrust forces on adjacent equipment/piping.
(some mes referred to as PA loads).
Movement amplitude varies, typically within the range of 1/4” to 10”.
Movement frequency may be extreme low cycle (1 per year), or high cyclic (such as vibration at 60 Hz)

Design temperature: -20℃~+400℃

Usage: Compensate and absorb axial, lateral and angular thermal deformation

Bellow compensator expansion amount, facilitate valve pipe install and demounting.

Absorb equipment vibration, reduce equipment vibration influenced on pipe.

Absorb deformation caused by earthquake, earth subsidence.

Specification

DN	Waves	Pressure rating(Mpa)					Bellows effective areas (cm2)	Maximum external diameter size (mm)	Length
		0.25	0.6	1.0	1.6	2.5			Flange JDZ/F (mm)	Connection tube JDZ/F (mm)
		Axial compensation (mm),f911 degree N/ram							Flange JDZ/F (mm)	Connection tube JDZ/F (mm)
32	8	25/21	22/26	20/26	18/63	15/98	16	110	160/250	264/210
32	16	50/11	46/14	41/14	36/32	31/47	16	220	224/291	316/320
40	8	25/28	22/44	20/44	18/89	15/106	23	130	164/259	269/260
40	16	50/14	46/22	41/22	36/45	31/55	23	240	230/304	319/400
50	8	25/30	22/51	20/70	18/70	15/138	37	150	172/276	282/230
50	16	50/16	46/26	41/35	36/35	31/70	37	260	240/342	347/450
65	8	33/28	30/35	26/44	22/55	19/68	55	170	315/294	300/260
65	12	42/16	38/22	38/32	34/40	29/50	55	280	260/334	340/470
80	8	40/20	36/26	34/33	28/41	24/54	81	200	240/338	344/260
80	10	53/14	49/17	49/21	43/26	38/33	81	230	270/368	374/300
100	8	45/47	45/60	40/75	35/93	29/117	121	220	235/317	323/280
100	10	76/26	74/32	64/40	57/50	49/63	121	260	305/381	387/320
125	6	48/38	42/47	38/59	34/74	29/92	180	250	282/314	316/320
125	8	85/23	77/29	66/36	58/45	50/56	180	290	382/386	388/360
150	6	49/42	44/50	40/62	34/78	29/97	257	250	282/339	338/320
150	8	79/34	71/43	64/51	54/59	46/65	257	290	356/399	402/360
200	6	52/49	46/55	42/68	38/78	34/111	479	300	280/348	348/370
200	8	73/31	65/44	59/52	53/58	48/78	479	340	340/402	402/420
250	6	72/30	63/34	59/42	52/45	47/55	769	300	315/379	415/420
250	8	108/16	97/21	87/35	79/39	71/47	769	360	393/459	493/460
300	6	72/51	65/55	59/59	52/65	47/71	1105	340	366/427	466/488
300	8	108/32	97/35	87/37	79/41	71/45	1105	400	464/525	564/520
350	6	72/58	65/62	59/67	52/74	47/81	1307	340	397/452	497/480
350	8	108/38	97/41	87/44	79/48	71/47	1307	420	509/564	609/540
400	6	72/54	65/58	59/62	52/68	47/75	1611	340	412/478	512/480
400	8	108/36	97/39	87/43	79/47	71/52	1611	420	522/588	622/560
450	6	108/32	97/35	87/37	79/41	71/45	1972	340	403/498	503/500
450	8	162/20	145/22	131/23	118/25	106/28	1972	450	503/658	603/590
500	6	108/59	97/64	87/68	79/75	71/82	2445	340	431/523	531/500
500	8	162/34	145/37	131/39	118/43	106/48	2445	450	531/665	631/600
600	6	108/74	97/80	87/85	79/94	71/103	3534	380	478/548	578/540
600	8	162/42	145/45	131/49	118/53	106/60	3534	380	658/679	758/640

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