KUGLETOLDVENTIL

摘要

In a ball valve in which a mass of resilient packing material (48) surrounds the ball member (28), adjustable means are provided for applying a compressive load to the packing material to cause it to sealingly engage the inner walls of the valve chamber (18) and the exterior of the ball member. The adjustable means include a rigid circular gland member (62) closely received in the bore (14) and extending transversely thereof in engagement with the packing material (48). A circular opening (64) in the gland member (62) closely surrounds the operating stem (32) and disk spring means (68) are positioned on the gland member (62). Closely received in the bore outwardly of the disk spring means (68) is a packing nut (80) having an inner surface engaging the disk spring means (68). Screwthreads (84) are associated with the packing nut (80) and the bore (14) for adjustably moving the packing nut member towards the packing gland (62) to compress the disk spring means (68) and apply a biasing force to the packing material (48).