FUNCTION The ball valve is the ideal valve for perfect sealing requirements; shutoff applications such as tie-ins, maintenance isolations, line closure, etc. WHY AMPO POYAM VALVES? AMPO POYAM VALVES is the reference in cryogenic ball valves due to our experience, quality and customer satisfaction ratio. As a result of more than 30 years manufacturing ball valves we are proud  to say that zero leak quality class has been achieved. Around 25,000 cryogenic test have been carried out at our testing facilities and in total, more than 250.000 ball valves have been manufactured. Due to the extremely long durability of our ball valves, the end user benefits not only with quality but also with lower maintenance costs.