Sturdy and reliable, they are equipped with an AISI 303 stainless steel operating stem to guarantee durability over time.
Double O-ring seal in HNBR on the operating stem.
Brass closing cap complete with gasket to guarantee the seal even in case of accidental damage to the stem seals.
The structural welding process is carried out in OLAB with a dedicated plant.
They are 100% tested and on each of them, the date and serial number are printed to certify the positive outcome of the test and to allow traceability over time of the performance data recorded during the test.