ADQ蝶形調節(jié)有其*的流通能力大，流阻損失小，適用于大口徑調節(jié)等優(yōu)勢，通過科學試驗的驗證及應用經驗，越來越多被廣泛采用。

ADQ butterfly valve has it unique characters:
Large flow, small flow resistance.
It applies big diameter.
It is more widely used.

近似等百分比的調節(jié)性能：

蝶型調節(jié)閥適用在大流量、壓差較低時滿足調節(jié)功能，流量特性曲線介于直線特性和等百分比流量特性之間，或是拋物線形，它克服了直線流量特性在小開度時靈敏度過高，不易控制，容易產生振蕩等缺點，又彌補了等百分比流量特性，小開度時相對流量小，大負荷時閥門接近全開的不足，ADQ蝶型調節(jié)閥，通過計算、測試和實踐經驗，在許多工況下，調節(jié)性能良好，閥體輕巧，實用性強。
Modulating performance of approximate equal percentage
In the condition of large flow and low pressure drop, butterfly valve can used as a modulating equipment, and the flow characteristic is in between of linear and equal percentage. It solves the shortage of linear characteristic which Sensitivity is too high at small opened position and is easy to surge. And it solves the shortage of equal characteristic that the relative flow is little at small opened position and the valve is full open at large flow.
 
全程動作平穩(wěn)，機械公差極小，調節(jié)精度高；
提供比同規(guī)格齒輪齒條傳動氣缸大20%的力矩輸出
壓縮到70%的整體蓄能彈簧包，保證推力持續(xù)*
滾筒支撐、大滑塊氣缸，每年可靠動作100萬次 
設計間隙小，無磨損、無震蕩，調節(jié)平滑穩(wěn)定無階梯感

Scotch York:

The action is steady, the mechanism tolerance is small, and the modulation precision is high. 
Offer more 20% output torque than the same gear and rack. 
Spring pack pressed to 70% guarantees lasting thrust.
Roller support, large slippery cylinder, 1 million reliable actions annually. 
No friction, no vibration.
 
密封性能及參數 見《快速安全切斷自動控程閥》樣本 Sealing  parameter refer to 《fast cut off Control valve>>.