Week 14 challenge
OBJECTIVE:
The objective of this project is to design the assembly of the Butterfly valve and apply the GD&T concepts to the various parts of the Butterfly Valve and to the assembly.
Butterfly Valve:-
A Butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow.Butterfly valves are easy and fast to open. A 90° rotation of the handle provides a complete closure or opening of the valve. Large Butterfly valves are usually equipped with a so-called gearbox, where the handwheel by gears is connected to the stem. This simplifies the operation of the valve, but at the expense of speed.
Butterfly valves are especially well-suited for the handling of large flows of liquids or gases atrelatively low pressures and for the handling of slurries or liquids with large amounts ofsuspended solids. Butterfly valves are built on the principle of a pipe damper. The flow control element is a disk of approximately the same diameter as the inside diameter of the adjoining pipe, which rotates on either a vertical or horizontal axis. When the disk lies parallel to the piping run, the valve is fully opened. When the disk approaches the perpendicular position, the valve is shut. Intermediate positions, for throttling purposes, can be secured in place by handle-locking devices.
Advantages of Butterfly valves-
- Compact design requires considerably less space, compared to other valves
- Light in weight
- Quick operation requires less time to open or close
- Available in very large sizes
- Low-pressure drop and high-pressure recovery
Disadvantages of Butterfly valves-
- Throttling service is limited to low differential pressure
- Cavitation and choked flow are two potential concerns
Parts of Butterfly Valves:-
1] Main Body of Butterfly Valve
2] Shaft
3] Retainer
4] Disc Plate
5.Lever
6. Nut
Assembly
