Compact construction with metal seated or soft seated structure, added with composite sealing ring, provides excellent sealing performance.

Double-guide from the bushing and the seat results in smooth and reliable operation.

Small operation force can achieve stable regulation because of the pressure-balance structure.

Parabolic cylinder core structure ensures broad range of adjustment and high precision of flow curve, and eliminates deadlocking.

The solid bushing improves the internal liquid environment to prevent flash distillations, cavitations and the damages.

Applicable to the occasion when there is great difference in pressure, large variation in temperature or particle impurities contained in media