Feature
1. A small portable, easy disassembly and maintenance, and can be installed in any location.
2. Simple, compact, 90-degree turn open quickly.
3. Operating torque is small, lightweight effort.
4. Flow curve tending to straight line, regulated performance.
5. Closing test how the number of words tens of thousands of times, long life.
6. To completely seal, gas leakage test is zero.
7. Replacement parts material, matching, applicable to a variety of media