1. Small in size and light in weight. Easy instllation and maintenance. It can be mounted wherever needed.

2. Simple and compact construction, quick 90 degrees on-off operation.

3. Minimized operating torque, energy saving.

4. Flow curve tending to straight line. Excellent regulation performance.

5. Long service life. Standing the test of tens of thousands opening/closing opetations.

6. Bubbles-tight sealing with no leakage under the pressure test.

7. Wide selection of materials, applicable for various medium.