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Materials of Construction


Transvac Ejectors are offered in many different materials grades and forms to suit the process conditions of each application.


The most common materials of construction for Ejectors are Carbon Steel and Stainless Steel, but Transvac has also supplied many Ejectors in other materials including:

  • High Yield Carbon Steel
  • Duplex & Super Duplex
  • Alloy 625 & 825
  • 6MO
  • Chrome Moly
  • Hastelloy C276
  • Titanium

  • Ceramic
  • Tungsten Carbide
  • Graphite
  • PTFE
  • Polypropylene
  • uPVC

Material Sourcing


All raw materials shall originate from and be manufactured within the following nations:-


  • All member nations of the EEA (European Economic Area), plus;
  • Argentina, Canada, Japan, South Africa, South Korea, Switzerland and USA.

Wherever possible, Transvac will endeavour to obtain materials from a customer’s Approved List of Material Suppliers, but sometimes this is not possible due to the small quantities of materials needed to manufacture an Ejector. In these cases, materials would be purchased from Transvac’s Approved List of Material Suppliers and then, if needed, additional material testing would be included to comply with the Contract material specification requirements.


Transvac is experienced in working in accordance with NACE MR-0175/ISO-15156, Shell DEP, NORSOK and Customer specific Specifications.

Transvac size 8 Liquid Jet Compressor for Aramco Materials: Duplex (UNS S31803) with Ceramic Internals
Transvac size 8 Liquid Jet Compressor for Aramco Materials: Duplex (UNS S31803) with Ceramic Internals

Erosion Resistant Ejector Designs

Transvac can supply Ejector designs that reliably handle abrasive fluids which would normally cause erosion to standard metallic materials.


Considerable experience has been gained over many years providing Ejectors for pumping sand slurry, flare gas recovery (using liquids), mineral mining and subsea processing applications.


Transvac has also performed in-house CFD studies and commissioned a long-term erosion testing programmes at a specialist Team at Southampton University to determine the most appropriate grades of abrasion resistant materials for different Ejector applications.


Erosion testing has been performed on various grades of ceramics and tungsten carbide, along with comparative testing of various metallic materials.

Ejector nozzles and diffusers in ceramic

Ceramic tablet and nozzles under testing as part of a joint University Research Project.

Hygienic Ejector Designs

Almost all of Transvac’s products can be offered as a hygienic design. Our Ejectors, Jet Heaters and Jet Mixers can be fully custom designed for hygienic applications, to suit your specific process requirements.


Available as standard in 316L stainless steel with sanitary fittings, all units are designed to meet current hygienic standards, suitable for C.I.P cleaning.


Hygienic Ejectors are offered with sanitary tri-clamp fittings instead of bolted flanges and receive a super polished finish to the inside to ensure maximum cleanliness.


Typical Hygienic Ejector designs include Liquid Jet Pumps for dosing liquids, Tank Jet Mixersfor mixing liquids, Liquid Jet Solids Pumps for dosing solids and a variety of Steam Ejectorssuch as Instantaneous Jet Heaters and Direct Injection Heaters.


Further information about our Hygienic Designs can be found here.

Hygienic Jet Heaters