結構性能特點

QV型開口球閥是為滿足精確調節與嚴格關斷的要求而設計的，與一般V型球閥不同，本球閥的V型開口在閥座球上，這樣，兼具V型球閥的調節性能與O型球閥的關斷性能。不同型式的開口，獲得不同的調節流量特性。這些閥球可以很方便地進行各種流量特性的調節。 
 
Characters
The QV-type valve provides positive shut-off with accurate manipulation .It is different from the common V-type valve, the V-type hatch lies on the ball, thus combines the V-type ball valve manipulation and the O-type ball valve shut off ability, winning different flux characters.

    
球芯開口型式Seat type

多種V型開口，實現多種調節流量特性；完整的球體密封面實現零泄漏。
Complete seal face reaches zero leakage.

細槽開口，線性調節 Slotted Seat, linear characteristic	閥芯不同開口型式提供了各種不同的調節性能。 The relationship between ball position and characterized seat allows for precision throttling control.	30°開口，等百分比調節 30°Seat, equal percentage
特殊開口，特殊調節 Custom seats, special applications		60°開口，等百分比調節 60°Seat, equal percentage

密封性能及參數 見 《快速安全切斷自動控程閥》樣本（半球V型球閥除外）
Sealing parameter refer to< >