Opening And Closing Process Of Stainless Steel Insulation Ball Valve

2 Piece Threaded Ball Valve and flange gate valve belong to the same type of valve. The difference is that its closing part is a sphere, which rotates around the center line of the valve body to open and close. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline.

Opening process of stainless steel insulated ball valve.

1. In the closed position, the ball is pressed on the valve seat by the mechanical pressure of the valve stem.

2. When the handwheel turns counterclockwise, the valve stem moves in the opposite direction, and the angular plane at the bottom of the valve stem causes the ball to leave the valve seat.

3. The valve stem continues to lift and interacts with the guide pin in the spiral groove of the valve stem, so that the ball begins to rotate without friction.

4. Until it reaches the fully open position, the valve stem is lifted to the limited position and the ball rotates to the fully open position.

Closing process of stainless steel insulated ball valve.

1. When closing, turn the handwheel clockwise, the valve stem begins to descend, and the ball begins to rotate away from the valve seat.

2. Continue to rotate the handwheel, and the valve stem is acted upon by the guide pin embedded in its spiral groove, so that the valve stem and the ball rotate 90 degrees at the same time.

3. When it is about to close, the ball has rotated 90 degrees and is not in contact with the valve seat.

4. In the last few turns of the handwheel, the angle plane at the bottom of the valve stem mechanically wedges into the ball and presses it tightly against the valve seat to achieve complete sealing.

Advantages of stainless steel insulated ball valves

1. Small fluid resistance, and its resistance coefficient is equal to the resistance coefficient of the same length of pipe section.

2. Simple structure, small size and light weight.

3. Tightness and reliability. At present, plastics are widely used as sealing surface materials for ball valves, with good sealing performance, and have been widely used in vacuum systems.

4. Easy to operate, quick opening and closing, only 90 degrees of rotation from full open to full closed, convenient for remote control.

5. Easy maintenance, the ball valve has a simple structure, the sealing ring is generally removable, and it is easy to disassemble and replace.

6. When the valve is fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface.

7. Wide range of applications, diameters from a few millimeters to a few meters, from high vacuum to high pressure. When the ball rotates 90 degrees, it should be spherical at the inlet and outlet, thus cutting off the flow.

The insulation ball valve is a relatively new type of ball valve, which has some advantages unique to its own structure, such as no friction in switching, small seal wear, and small opening and closing torque. This may reduce the specifications of the actuator. The multi-rotation electric actuator is used to adjust the medium and cut off tightly.