Electric Butterfly Valves: These valves are remotely operated using a two-directional motor.With an ability to remain open or stay closed if the actuator fails, the actuated valves provide a safe and dependable option. The valve actuators allow for control of larger valves. Manually Operated Butterfly ValvesĪutomatically Operated butterfly valves can be controlled from remote locations. Classification Based On Valve Actuatorsīased on their valve actuation method, butterfly valves can be separated into manually operated valves that use manual handles or gears and automatically operated valves that function using electric, pneumatic or hydraulic actuators. They are classified here based on their valve actuators, connection design, and disc closure design. Types Of Butterfly Valvesīutterfly valve types vary based on their different classifications. Isometric symbols are used in isometric drawings. Similar to a globe valve symbol with two diagonal lines crossing themselves, the butterfly valve symbol is the only symbol where a full triangle is not used. In the centre of the two vertical lines and the middle of the diagonal line is a solid circle. The two solid horizontal lines by the sides of the vertical lines indicate that butterfly valves are two-way inline valves used for flow control, either on/off or throttling. The symbol of the butterfly valve is composed of two vertical parallel lines, with a diagonal line extending from the top of the first line to the bottom of the second line (P&ID symbol). The main components of a butterfly valve are the disk, stem, seat, and body. They are functional for various media, and due to their lightweight and low cost, they are found in several modulation devices. While throttling valves, most butterfly valves function as only block valves. Originally, the butterfly valves were installed where tight seals are not necessary however, the production of the valves with tight seals made of rubber or elastic materials enabled the butterfly valve to function as a shut-off valve. With the rod of the machine representing the body of a butterfly and the disc representing the wings, the movement of the valve mirrors the movement of a butterfly, with each wing making a 90-degree rotation. The butterfly valve, as the name implies, operates like the butterfly.

The rod passes through the disc into an actuator which regulates the movement of the disc, rotating the disc either parallel or perpendicular to the flow of media. The butterfly valve has a rod and a disc. A butterfly valve is a machine that rotates its disk by a quarter-turn to allow or restrict the flow of media within the diameters of large pipes.

Check valve isometric symbol