Drop tight seating is accomplished over the full pressure range because a slight clearance at the pivot pin assures complete seating between the disc ring and body ring.

• 由于在枢轴销上的空隙很小,所以在整个压力范围内都可以实现漏斗形紧密阀座密封,确保阀瓣环和阀体环之间的阀座密封的完整性。