HIGH PRESSURE VALVE

摘要

HIGH PRESSURE VALVE () A high pressure valve of the type employing a nonrotating valve needle having a tapered tip which may be selectively moved between seated and unseated positions relative to a valve seat in a valve chamber. The valve seat is tapered inwardly and has a smaller taper angle than the valve needle. A valve actuating stem is received through a valve packing nut with the actuating stem having a bifurcated inner end defined by a transverse, generally rectangular bore intersected by an axially directed slot. The slot is somewhat smaller in breadth than the width of the bore and extends between the bore and the innermost end of the stem. The valve needle includes an enlarged cylindrical or spherical connecting end adapted to be received in the actuating stem bore and slot. Sealing for the needle is provided by a sealing medium comprised of a combination of a seal member received between a pair of seal washers in an enlarged coaxial area at one end of the valve chamber. The innermost end of an alignment bushing received over the valve needle applies a compressive force against the sealing medium with the opposite end of the bushing being positively located and engaged by the packing nut to properly center the needle in the valve chamber. The inlet passage into the valve chamber may be configured so as to receive and locate a replaceable seat member. An improved adjustable locking bracket is employed to retain the packing nut in a final adjusted position relative to the valve body.