AMPO POYAM VALVES is a world leader in highly engineered valves for the most severe applications and services. Extensive experience allows us to undertake international projects with demanding technical requirements, offering solutions with the highest level of reliability and minimum maintenance costs. Full control of the supply chain with our owned foundry division and field support with the Service Division are key characteristics of the Group vision.

The company, founded in 1964, has vast experience in critical applications such as cryogenic temperatures, high temperatures, corrosive media, erosive and abrasive applications in surface or subsea environment, always under the most challenging conditions with the maximum quality and performance level.

Expertise and Products

One of the expertise of the company are the cryogenic applications and low temperature solutions.

Cryogenic service valves main applications are focused on LNG and LPG terminals and transportation ships.  AMPO POYAM VALVES manufactures valves for the  complete LNG and LPG chain, as gas is obtained from gas cameras, transportation pipelines, liquefaction, carrier vessels, FPSO’s, regasification terminals, peak saving plants, storage tanks, etc. Moreover, our valves are also used for low temperatures, offering the best solution for applications  such as:  Ethylene, Oxygen, Nitrogen, petrochemical plants, special processes on refineries, etc.

High skilled engineers bring together differential technical and added value advantage. Up to date design tools like 3D CAD and FEM analysis (i.e mechanic, flow, thermodynamic), advanced multibody and fluid-structure interaction modelling, adequate control of the manufacturing and supply chain as well as qualified quality assurance practices are applicable during the whole development, fabrication, and qualification processes.

As a result of over 60 years of experience in the manufacturing of cryogenic valves, being a leading manufacturer of highly engineered valves for the LNG market, especially with top entry or split body cryogenic ball valves, cryogenic gate, globe and check valves as well as cryogenic butterfly valves.


AMPO POYAM VALVES has the know-how for virtual prototyping design of such critical cryogenic valves in the whole temperature range either for LNG or liquified air gases as well as also for liquified hydrogen or helium.

Testing plays a critical role for the validation of the quality for cryogenic valves up to sizes DN2500.

Key testing facilities are test benches for hydrostatic and gas pressure tests, LN2 bathes, shelter protected area for He or N2 gas pressure test up 2000 bar, performance endurance test up to 3000 bar hydrostatic test with heat and cooling options, clean room ISO class 7 for cryogenic and oxygen service valve assembly, mass spectrometers for helium leak detection are part of the production capacities.

Cryogenic helium leak and pressure tests in LN2 bathes at 77K are daily business.  

The testing technician staff is certified as Leak Testing level 2 for Trace Gas method per ISO 9712. Test procedures for leak testing of vacuum valves used for control of gas flow or vacuum pressure in a vacuum system per International Standard ISO 27895. Common practice trace methods are suitable for the verification of vacuum valve specifications.

  • Sniffing leak detection <= 5x10-10 Pa*m3/s
  • Vacuum leak detection <=5x10-13 Pa*m3/s

All these capabilities as well as the large facilities enable AMPO POYAM VALVES to verify the quality of the developed products, to characterize the performance of the valves at different conditions and to gain knowledge that helps developing HIGH QUALITY PRODUCTS.

AMPO POYAM VALVES provides the best VALVE SOLUTION in line with client project requirements with the best reliability and VALUE-ADDED differentiation.

Recent Developments

AMPO POYAM VALVES has recently developed liquid hydrogen and helium on/off and control valves with a special flexible design.

The group has expanded the capacities of integrated smart controls in the field of the instrumentation and system solutions.


AMPO POYAM VALVES is a world leader valve manufacturer in cryogenic service with a large reference for LNG business all over the world with millions of valves delivered to the facilities of main energy contractors.