Bellows expansion joint

CSU

Bellows universal expansion joint

Perceives axial, shear, and angular movements simultaneously. Two bellows with coupling elements.

Nominal diameter DN
50-800 mm
Nominal pressure PN
up to 25 kgf/cm²
Temperature
up to +450 °C
Bellows universal expansion joint KSU

Applications

District heating networks
Steam lines
Process pipelines
Hot and cold water systems
Boiler houses and heating substations
Oil and gas facilities

Specifications

TypeUniversal (two bellows), flanged/welded
Movements absorbedaxial, shear, and angular
Nominal diameter, DN50-800 mm (up to 3000 mm on request)
Working pressure, PNup to 25 kgf/cm²; higher to order
Medium temperatureup to +450 °C
Working mediumwater, steam, gas, petroleum products and other non-aggressive media
Bellows materialcorrosion-resistant steel 12Kh18N10T
Connectionflanges or pipes for welding
Manufacturingto project parameters (DN, PN, travel)

Exact compensating capacity and face-to-face length depend on the size and are determined during selection from the completed questionnaire.

Size range

DN 50DN 65DN 80DN 100DN 125DN 150DN 200DN 250DN 300DN 350DN 400DN 500DN 600DN 700DN 800

Other diameters and versions are manufactured to order.

Description

Bellows universal expansion joint (CCU) is a expansion joint consisting of two series—mounted bellows connected by an intermediate pipe. It perceives axial, shear (transverse) and angular movements simultaneously.

The universal design is used in areas with complex movement paths, where one type of compensation is not enough. It can be equipped with tie rods to limit the stroke.

OnePROM manufactures a control panel for the parameters of the object: diameter, pressure, temperature, and types of compensated movements. Selection is based on a questionnaire.

How we work

Selection

We receive the questionnaire or specification and select the type and parameters.

Calculation and quotation

We calculate the compensating capacity and prepare a quotation.

Manufacturing

We manufacture the expansion joint to project parameters under quality control.

Delivery and installation

We ship to site and, where required, provide installation, installation supervision and commissioning.

Frequently asked questions

What is CSU and where is it used?

Perceives axial, shear, and angular movements simultaneously. Two bellows with coupling elements. Used in: heating networks and heat supply, steam pipelines, process pipelines, hot water and HVAC systems, boiler houses and central heating plants, oil and gas facilities.

What diameters, pressure, and temperature does the CSU allow?

The control cabinet is manufactured to meet the parameters of the object: nominal diameter 50-800 mm (up to 3000 mm on request); working pressure up to 25 kgf/cm2; higher on request; temperature up to +450 °C; working medium — water, steam, gas, petroleum products and other non-aggressive media.

How do I order a CSU?

Complete the data sheet on the site or request a quote — we will select the size for your parameters (DN, PN, working travel, medium). Made to order, delivered across Russia and the CIS.

We will select the CSU for your object

Send a data sheet or specification — we will prepare a calculation and a quotation.

Request a quote