by BALL VALVES
This type of valve is opened or closed by a ball. Like the plug and
gate valves, the ball valve is used only in the fully open or fully
closed position. The ball has a hole through the centre which is the
same size as the valve ports in the valve body. The valve moves from
the fully open position to the closed position by moving the valve
handle a quarter of a turn.
The position of the valve handle indicates whether the valve is
fully open or fully closed. When the valve handle is pointing in
the direction of the pipe the valve is in the fully open position.
When the valve handle is pointing across the pipe the valve is
in the fully closed position.
The ball is carefully machined so that it fits exactly into the
valve seats. It gives a very tight shut off with metal to metal
seal. Ball valves are very good when they are used in gas processes
at high and low pressures and temperatures.
This type of valve is opened or closed by a ball. Like the plug and
gate valves, the ball valve is used only in the fully open or fully
closed position. The ball has a hole through the centre which is the
same size as the valve ports in the valve body. The valve moves from
the fully open position to the closed position by moving the valve
handle a quarter of a turn.
The position of the valve handle indicates whether the valve is
fully open or fully closed. When the valve handle is pointing in
the direction of the pipe the valve is in the fully open position.
When the valve handle is pointing across the pipe the valve is
in the fully closed position.
The ball is carefully machined so that it fits exactly into the
valve seats. It gives a very tight shut off with metal to metal
seal. Ball valves are very good when they are used in gas processes
at high and low pressures and temperatures.
