Motorized butterfly valve and electric operated ball valve

The traditional butterfly valve never used a very tight closure. But after several years of development, now the butterfly valves have been manufactured along with a fairly tight seal. The same is made of the material such as rubber or elastomeric materials. These materials provide a good option of shut off, just like many other types of valves.

Motorized Butterfly valves also find its usage at the places where space is less. The butterfly valves can be used for regulating the flow, also like in full-open and closed position. It is also important to know that the pressure loss through a butterfly valve is much smaller than the gate valve. We must tell you that the L/D ratio for butterfly valve is one-third of the gate valve. Butterfly valves are used in many large and small sizes also. They are often hand wheel operated and sometimes also operated through a wrench or gearing mechanism.

The butterfly valve is a rotary valve in which there is a disk-shaped seating element which is rotated 90° so that the flow can be opened or closed. They find their application in the throttling service where large-size valves with automatic actuators are required. Butterfly valves cannot be used where there is a need for non - obstructed, full opening. As compared to the ball valve, they have better size and weight.

The butterfly valves can operate at a high-pressure drop, along with a metallic or soft disc. The butterfly construction can withstand high temperatures where the upper temperature can also be increased through a refractory lining. The butterfly valves are often used in low-pressure water service and throttling usage.

A ball valve is a type of quarter-turn valve. It uses a hollow and perforated ball to control the flow, and hence it is called as the ball valve.  It gets open when the hole in the ball comes in line with the flow and closes when it gets at a pivoted angle of 90 degrees. The handle remains flat as per the flow when open and is perpendicular when closed. You can easily get to know through its visual that what is the status of the valve.

The electric operated ball valve is easy to operate and easy to repair too. It is a versatile equipment, and hence it is ideal for extensive use by many industries. It can support the pressure of around 1,000 bar and also the temperatures up to 752 °F or 400 °C. Its size can start from 0.2 inches and go up to 48 inches. Valve bodies can be made of metal, plastic, ceramic, etc., and the floating ball can be chrome plated so that it lasts long.