WZLD Manufacturer API6D Big Size 2PC Carbon Steel Resistant Ball Valve With Handles

To make a fast&successful offer to you(valued customers) , we need follow information.
1.Valve type
2.Bore
3.Size
4.Rating
5.connection
6.Operation
7.Body material
8.Trim material
9.Desgin standard
10.QTY
11.other special requirements 

WORK PRINCIPLE
Opening Of Orbit Ball Valve
When it is at the closed position, the ball is closely pressed onto the seat under the mechanical pressure of stem. When the handwheel is turned counterclockwise. The stem will move upward, and the anguler plane at the bottom of stem will make the ball sealing face leave the seat. The stem will continue rising and interact with the guide pin in the stem spiral groove to make the ball turn 90 itout friction until the stem rises to the ultimate position and the ball hole is aligned with the valve channel.

Closing Of Ball Valve
During the closing, turn the handwheel clockwise, the stem will move downward and make the ball start rotation. Continue turning the handwheel, and the stem will make the stem and ball turn 90 t ogether under the action of guide pin in the spiral groove embedded in the stem, when it is nearly closed, the ball has turned 90 without contact with the seat,the stem will continue moving downward, the ball sways to press the seat so as to make the sealing face in the seat produce elastic deformation and closely fit the ball sealing face,and therefore, ensuring safe and reliable zero leakage.

Remarks : we also can make according to the drawing of customer .