Straight-Tube Pressure-Balanced Bellows Compensator

Straight‑tube, pressure‑balanced (barrel‑shaped) bellows compensators are used to absorb axial displacement in piping systems while self‑balancing internal pressure thrust. This design is suitable for straight pipelines at high elevations or large‑diameter pipelines where it is not feasible to install fixed supports, and is particularly well suited for use in pipe racks.

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Category:

Thermal Pipeline Compensator

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Instructions for Use:

Straight‑tube, pressure‑balanced (barrel‑shaped) bellows compensators compensate for axial displacement in piping systems and inherently balance internal pressure thrust. This design is suitable for straight pipelines at high elevations or large‑diameter pipelines where it is not feasible to install fixed supports, and is particularly well suited for use in pipe racks.

Model example:

Product Parameter Selection Table (1)

Working pressure: 1.5 MPa

Serial Number	Product Code	Nominal Diameter (mm)	Maximum radial dimension (mm)	Axial Compensation Amount (mm)	Axial stiffness (N/mm)	Applicable Temperature (°C)	End pipe size (mm)	Product Length (mm)
1	16ZHZYP600×6/12-J	DN600	1220	160	2350	-20°C to 300°C	Φ630×10	2800
2	16ZHZYP600×8/16-J	DN600	1220	210	1610	-20°C to 300°C	Φ630×10	3300
3	16ZHZYP700×6/12-J	DN700	1400	160	2380	-20°C to 300°C	Φ720×10	2800
4	16ZHZYP700×8/16-J	DN700	1400	210	1660	-20°C to 300°C	Φ720×10	3300
5	16ZHZYP800×6/12-J	DN800	1550	160	2390	-20°C to 300°C	Φ820×12	2800
6	16ZHZYP800×8/16-J	DN800	1550	210	1770	-20°C to 300°C	Φ820×12	3300
7	16ZHZYP900×6/12-J	DN900	1700	160	3211	-20°C to 300°C	Φ920×12	2800
8	16ZHZYP900×8/16-J	DN900	1700	210	2410	-20°C to 300°C	Φ920×12	3300
9	16ZHZYP1000×6/12-J	DN1000	1820	180	3641	-20°C to 300°C	Φ1020×12	3000
10	16ZHZYP1000×8/16-J	DN1000	1820	240	2690	-20°C to 300°C	Φ1020×12	4000
11	16ZHZYP1200×6/12-J	DN1200	2180	180	4650	-20°C to 300°C	Φ1220×14	3000
12	16ZHZYP1200×8/16-J	DN1200	2180	240	3490	-20°C to 300°C	Φ1220×14	4000
13	16ZHZYP1400×6/12-J	DN1400	2450	180	4260	-20°C to 300°C	Φ1420×14	3000
14	16ZHZYP1400×8/16-J	DN1400	2450	240	2750	-20°C to 300°C	Φ1420×14	4000
15	16ZHZYP1600×6/12-J	DN1600	2700	180	4075	-20°C to 300°C	Φ1620×16	3000
16	16ZHZYP1600×8/16-J	DN1600	2700	240	3060	-20°C to 300°C	Φ1620×16	4000
17	16ZHZYP1800×6/12-J	DN1800	3000	180	4480	-20°C to 300°C	Φ1820×16	3000
18	16ZHZYP1800×8/16-J	DN1800	3000	240	3360	-20°C to 300°C	Φ1820×16	4000

Product Parameter Selection Table (Part 2)

Working pressure: 2.5 MPa

Serial Number	Product Code	Nominal Diameter (mm)	Maximum radial dimension (mm)	Axial Compensation Amount (mm)	Axial stiffness (N/mm)	Applicable Temperature (°C)	End pipe size (mm)	Product Length (mm)
1	25ZHZYP600 × 6/12~J	DN600	1220	160	3480	-20°C to 300°C	Φ630 × 12	2800
2	25ZHZYP600 × 8/16~J	DN600	1220	210	1880	-20°C to 300°C	Φ630 × 12	3300
3	25ZHZYP700 × 6/12~J	DN700	1400	160	3965	-20°C to 300°C	Φ720 × 12	2800
4	25ZHZYP700 × 8/16~J	DN700	1400	210	2750	-20°C to 300°C	Φ720 × 12	3300
5	25ZHZYP800 × 6/12~J	DN800	1550	160	3970	-20°C to 300°C	Φ820 × 14	2800
6	25ZHZYP800 × 8/16~J	DN800	1550	210	2970	-20°C to 300°C	Φ820 × 14	3300
7	25ZHZYP900 × 6/12~J	DN900	1700	160	4580	-20°C to 300°C	Φ920 × 16	2800
8	25ZHZYP900 × 8/16~J	DN900	1700	210	3210	-20°C to 300°C	Φ920 × 16	3300
9	25ZHZYP1000 × 6/12~J	DN1000	1820	180	4780	-20°C to 300°C	Φ1020 × 18	3000
10	25ZHZYP1000 × 8/16~J	DN1000	1820	240	3585	-20°C to 300°C	Φ1020 × 18	4000
11	25ZHZYP1200 × 6/12~J	DN1200	2180	180	5600	-20°C to 300°C	Φ1220 × 20	3000
12	25ZHZYP1200 × 8/16~J	DN1200	2180	240	4200	-20°C to 300°C	Φ1220 × 20	4000
13	25ZHZYP1400 × 6/12~J	DN1400	2450	180	5200	-20°C to 300°C	Φ1420 × 22	3000
14	25ZHZYP1400 × 8/16~J	DN1400	2450	240	3900	-20°C to 300°C	Φ1420 × 22	4000
15	25ZHZYP1600 × 6/12~J	DN1600	2700	180	8850	-20°C to 300°C	Φ1620 × 24	3000
16	25ZHZYP1600 × 8/16~J	DN1600	2700	240	4750	-20°C to 300°C	Φ1620 × 24	4000
17	25ZHZYP1800 × 6/12~J	DN1800	3000	180	8980	-20°C to 300°C	Φ1820 × 26	3000
18	25ZHZYP1800 × 8/16~J	DN1800	3000	240	5750	-20°C to 300°C	Φ1820 × 26	4000