Project

2. BODY - BUTTERFLY VALVE

KKakarla Rajesh28 Mar 2023

BODY -BUTTERFLY VALVE :-

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.

COMPONENTS ARE IN THE BUTTERFLY VALVE:

BODY
SHAFT
RETAINER
DISC PLATE
LEVER HANDLE
NUT

BODY:

The one of the major component in butterfly valve is body that is fit between two pipe flanges. The following sets of the command used for Body designing in CATIA V5

SKETCH VIEWS FOR BUTTER FLY PART IS GIVEN BELOW

TOP VIEW

ISOMENTRIC VIEW

MULTI VIEW

DRAFTING ON BUTTERFLY VALVE - BODY :-

SHAFT -BUTTERFLY VALVE :-

In order for the disk to be held in the proper position, the stem must extend beyond the bottom of the disk and fit into a bushing in the bottom of the valve body.The disc plate and lever are assembled to this shaft.

RETAINER -BUTTERFLY VALVE :-

Retainer is a kind of washer fixed on the body of butterfly valve. Butterfly valves comprise a valve seat comprising a generally S-shaped cross-section and a valve seat retainer configured with appropriately shaped cooperating surfaces.

DRAFTING IN RETAINER -BUTTERFLY VALVE :-

PLATE -BUTTERFLY VALVE :-

When valve is fully opened or closed the disc is rotated a quarter turn.Disc is mounted on shaft. When the valve is closed, the disc is turned so that it completely blocks off the passageway.When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid.

This method of assembly is advantageous in the case of covered disks and in corrosive applications.