Rotary compensator

Keywords:

Rotary compensator

Category:

Thermal Pipeline Compensator

Product Inquiries:

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Inquiry

Main technical parameters:

Standard Type: ≤2.5 MPa, High-Temperature Medium Pressure: ≤5 MPa, Operating Temperature:

Standard Type: ≤ 300℃ High-Temperature, Medium-Pressure: ≤ 500℃

Specification range: DN50–DN1400

Standard: CJ/T487

Model: FH.XTB (Nominal Diameter) – (Pressure) – (Temperature) Application Scope: High‑temperature hot water, steam overhead lines, and pipe rack pipelines.

Structure and Features:

The patented product developed and manufactured by our company, the Non-Thrust Rotary Compensator (FHXB), employs the most advanced and reliable self‑pressurizing sealing technology and a dual‑stage combined sealing structure. This product features a rational design, a unique structure, zero thrust, self‑sealing capabilities, and a large compensation capacity. It embodies all the advantages of various types of expansion joints and is widely used in heating, water supply, gas transmission, petrochemicals, power generation, metallurgy, textiles, construction, and other industries. The Non-Thrust, Maintenance‑Free Rotary Compensator utilizes a composite packing seal structure and incorporates an additional sliding plane bearing seal at the end face of the rotating pipe. As internal pressure increases, the sealing performance improves, resulting in a double‑sealed system that automatically adjusts sealing force while the compensator remains sealed—eliminating the need for manual preload. Regardless of the causes that lead to sealing gaps, the compensator can promptly self‑compensate for leaks, and its sealing rings are resistant to corrosion, weathering, and material degradation. Under high‑temperature and high‑pressure operating conditions, it maintains leak‑free performance over extended periods.

Thrust‑free, maintenance‑free, pressurized leak‑sealing rotary compensator: The compensator primarily relies on a self‑sealing mechanism, where the annular face seal ensures the sealing requirements specified for this project, while the end face seal guarantees autonomous sealing under the project’s required parameters—meaning that as medium pressure increases, the compensator’s self‑sealing capability also improves accordingly. The compensator further employs a pressurized sealing packing injection technology, enabling in‑line maintenance without shutting down production and ensuring that the entire system remains leak‑free over extended periods of operation under high temperature and high pressure conditions.

Compression-type rotary compensator: It consists of a rotating inner cylinder, packing gland, tightening flange, guiding centering ring, molded flexible graphite sealing packing, sealing compression ring, sealing seat housing, end pipe, bolts, and nuts. This product features zero thrust, large compensation capacity, and leak-free performance.

Packed Rotary Expansion Joints: Composed of a rotating inner cylinder, a sealing seat housing, a guiding centering ring, sealing rings, a packing and leak‑sealing device, specialized packing material, and end connecting pipes. This product features zero thrust, large compensation capacity, superior sealing performance, long service life, and the ability to be maintained and serviced online. Packed Compression–Composite Rotary Expansion Joints: Consist of a rotating inner cylinder, a packing gland, a tightening flange, a guiding centering ring, molded flexible graphite sealing packing, specialized packing material, a packing and leak‑sealing device, a sealing compression ring, a sealing seat housing, end connecting pipes, bolts, and nuts. This product is characterized by zero thrust, large compensation capacity, high temperature and pressure resistance, dual safety features, no leakage, and the ability to undergo maintenance and servicing while in normal operation, as well as to have flexible sealing packing injected as needed. Self‑Maintaining Rotary Expansion Joints: Composed of a rotating inner cylinder, a packing gland, a tightening flange, a spring flange, springs, a guiding centering ring, molded flexible graphite sealing packing, a sealing compression ring, a sealing seat housing, end connecting pipes, bolts, and nuts. This product boasts zero thrust, self‑maintenance capabilities, large compensation capacity, and no leakage. High‑Temperature, High‑Pressure Self‑Pressurizing Sealed Rotary Expansion Joints: Due to the harsh operating conditions and stringent requirements associated with high‑temperature, high‑pressure environments, our company designs and manufactures these joints specifically according to the technical specifications provided by the customer. The product is crafted using low‑alloy steel seamless steel pipes or solid forgings selected based on the design temperature, pressure, and medium, along with high‑performance, high‑temperature, high‑pressure, wear‑resistant, and high‑strength composite sealing materials. These joints are manufactured using specialized structural designs, unique production processes, and advanced manufacturing techniques, ensuring high temperature and pressure resistance, zero thrust, self‑sealing capabilities, large compensation capacity, and complete leak‑proof performance. *It is particularly worth noting that conventional rotary expansion joints often employ reducer pipes as connections in order to reduce costs and simplify fabrication. However, reducer pipes can generate vortices and flow resistance within heating network pipelines, adversely affecting pipeline flow velocity, flow rate, and pressure—and their interface dimensions and geometric tolerances tend to exhibit significant deviations, making it difficult to ensure reliable welding quality. For this reason, all models in our zero‑thrust rotary expansion joint series feature straight pipe connections whose diameters match the nominal diameter of the pipeline, fundamentally eliminating these issues. These products have received widespread praise from users since they were put into service.

Product Selection Table

Nominal Diameter Nominal Diameter DN (mm)	Compensation amount Compensation Amount Δ x (mm)	Outer diameter of the接管 Outer Diameter of Connection Pipe d(mm)	Maximum outer diameter Max. Outer Diameter D(mm)	Product Length L (mm) The Length of the Product	Frictional torque (kN·m)
					Internal pressure (MPa)
					1.0 MPa	1.6 MPa	2.5 MPa	4.0 MPa
100	0–1000	108	230	310	0.62	0.96	2.5	2.23
125	0–1000	133	260	310	1.15	2.0	3.13	4.68
150	0–1200	159	285	310	1.81	2.86	4.35	6.97
200	0–1200	219	375	330	2.52	4.10	5.93	9.49
250	0–1500	273	425	360	5.0	7.60	11.61	18.65
300	0–1800	325	480	360	7.61	12.10	17.48	27.56
350	0–1800	377	530	360	9.79	15.85	22.50	36.32
400	0–1800	426	580	360	12.89	20.15	29.84	47.60
450	0–1800	480	630	360	18.20	29.15	42.21	67.52
500	0–1800	530	690	370	24.97	38.96	57.12	91.58
600	0–1800	630	790	370	31.20	50.00	70.23	113.60
700	0–1800	720	910	410	38.12	54.80	86.70	138.50
800	0–1800	820	1015	450	45.90	72.45	105.20	168.30
900	0–1800	920	1130	480	53.60	87.62	124.50	197.00
1000	0–1800	1020	1235	480	62.50	100	145.00	230.00