The product principle of the high-pressure three-eccentric all-metal hard-sealed quick-cut-off and regulating butterfly valve provided by Viti Industry

1. Unique design

Valve stem anti-blowout ring - prevents the valve stem from being blown out in an unexpected situation;

2. Replaceable valve seats and sealing rings - reduce on-site maintenance costs;

3. All-metal sealing system - Stellite alloy at HRC40-60 degrees;

4. Dynamic load packing gland - The dynamic load has predictable and constant packing compression force, and can be used continuously for 5,000 switch cycles without the need for adjustment or re-packing.

5. Universal installation bracket - The connection between the actuator installation bracket and the valve stem complies with the ISO5211 standard;

6. Valve plate end display - A simple valve position display is provided at the end of the valve stem.

Two, the principle of three eccentricities

Eccentricity 1 - The valve shaft is located behind the valve seat shaft, enabling the seal to fully and tightly encircle and contact the entire valve seat.

Eccentricity 2 - The centerline of the valve shaft deviates from the centerlines of the pipeline and the valve, thus avoiding interference from the opening and closing of the valve.

Eccentricity 3 - The cone axis of the valve seat deviates from the centerline of the valve shaft. This can eliminate the frictional effect during the closing and opening processes and achieve a uniform and consistent compression sealing effect around the entire valve seat.