please fill the form, to download the document
size: 3 Mb
Link for downloading the catalog was sent to your email address.

To download the catalog you need to click on the link in this email.
для пересылки каталога заполните форму
Спасибо, Ваша заявка получена.

В ближайшее время с Вами свяжется менеджер для отправки печатной версии каталога.

Pressure balanced

To absorb various movements without transferring pressure thrust to a pipework

Pressure balanced expansion joints absorb axial and lateral displacements without applying pressure thrust to a piping.

VZM manufactures axial pressure balanced expansion joints with various types of end fittings (welded ends, welded flanges or their combinations) in accordance with international standards or customer’s specification.

Main technical characteristics

ДиаметрNominal diameter, (DN), mm 25 – 1200
Давление рабочееWorking pressure (PN), bar From vacuum up to 75 bar (for DN 25)
Давление пробноеTest pressure (PT), bar 1,5 × PN or according to customer’s specifications
ТемператураMedia temperature, °С From -196 °С to +550 °С
Up to 100 000 cycles (upon confirmation of technical specifications with a customer).
РесурсBellow materials
AISI 321, AISI 304, AISI 316L and their equivalents
Виды концевой арматурыTypes of end fittings
With welded ends, welded flanges, their combinations or customer’s specification

Types of pressure balanced expansion joints


Order according to your drawing or filled questionnaire

Benefits for our customers

  • We handle all customs procedures ourselves and we deliver ready-to-use products with all certificates to customer’s door;
  • We have our own warehouse on EU territory and can maintain stock for our customers;
  • We accept different payment schemes;
  • Our full cycle production provides the highest quality and reliability due to quality control on every stage of production;
  • The plant accepts orders for production from one unit;
  • The plant develops special solutions in accordance with customer’s specification;
  • Optimal lead times for standard products and special solutions both;
  • The products are in full compliance with European norms and regulation, which is confirmed by ISO 9001:2008 certificate;


  • Certificate and declaration of conformity to the regulations of the Customs Union
  • GOST certificate
  • License for production of equipment for facilities, complexes and installations with nuclear materials designated for production, processing and transportation of nuclear fuel and materials
  • License for designing the equipment for nuclear installations
  • ISO 9001:2008 certificate (issued by TÜV Rheinland)

Ordering expansion joints

VZM manufactures and supplies as large series of bellow expansion joints as single units. You can order our products in the way that is most convenient to you – you can select our standard axial expansion joint from the Table below or use E-mail, phone or online form. Do not hesitate to contact us if you have any questions or need special solution.