Development of the valve for low-temperature service with only-rotational-sliding-type gland mechanism developpement d'une sourpape pour service basse temperature avec mecanisme de presse-etoupe de type a pivotement uniquement coulissant

摘要

In the existing gland part of the LNG valve, gland packing was inserted and clamped up. In this construction the seal might have weaken due to hte vertical sliding of the value stem and packing duirng the opening and closing of the vlave.