Rotary compensator

Product Introduction

The rotary compensator is a high-efficiency thermal expansion compensation device specially designed for thermal pipeline systems. It ensures the stability and safety of the pipeline system by absorbing the axial, transverse or angular displacement of the pipeline due to temperature changes. The following is an introduction to its core products:

I. Structure and composition

1. Main structure
   It is composed of inner and outer casing, sealing seat, flexible graphite filler, spring compression device, anti-friction centering bearing, etc.

• Sealing system: Flexible graphite filler is used, supplemented by spring to automatically compensate for wear, ensuring long-term sealing.

• Reducing friction design: Ball or anti-friction bearings are set between the inner and outer sleeves to reduce friction loss and prolong the service life.

b. Core Component Functions

• Spring compression device: Automatically compensates for packing wear and reduces maintenance frequency.

• Rotating cylinder: Absorb pipe displacement by relative rotation and reduce stress concentration.

2. Working principle

1. Dynamic compensation
   A force couple is formed by compensators arranged in pairs or groups, and the angular displacement of the rotating cylinder is used to absorb the displacement generated by thermal expansion and cold contraction of the pipeline, and the compensation distance can reach 500 meters.

• example: Absorption of Δ L thermal elongation by rotation angle θ in Z-shaped or L-shaped pipes.

b. Self-sealing mechanism
When the packing is worn, the spring is automatically compressed and compensated, and the leakage period can be delayed by 3-5 years; In case of excessive wear, only tighten the nut, and no downtime maintenance is required.

Product Features

1. High performance compensation

• The compensation amount is more than 500mm, and a single group can compensate the maximum pipeline of 500 meters.

• The maximum pressure is 4.0MPa, and the applicable temperature range is-60℃ ~800℃.

• Zero blind plate force: Avoid the fixed bracket from being damaged by thrust and reduce the construction cost of the bracket.

• Maintenance-free design: Sealing life up to 20 years, low running cost.

• Supports flanged or welded connections, pipe diameters cover DN25-DN1400.

• It is suitable for steam, hot water, oil and other media.

Typical Application Scenarios

1. Heating pipe network

• Z/L-shaped arrangement of overhead or buried pipes to absorb long-distance thermal displacement.

• Case: A biomass thermal power project reduces the number of fixed brackets by rotating compensator, saving 30% investment.

b. Industrial Piping Systems

• High-temperature and high-pressure steam pipelines in petrochemical and electric power industries, replacing traditional corrugated compensators.

V. Technical parameters

6. Suggestions on selection and installation

1. Key points of model selection

• Select π-type, ω-type and other arrangements according to the pipeline direction.

• Priority is given to all stainless steel materials to improve corrosion resistance.

• The spacing between the guide brackets should be encrypted, and the sliding brackets should be equipped with rolling supports.

• Spring supports and hangers are required for vertical installation to prevent pipe segments from deflecting.