Week 14 challenge

OBJECTIVE

The objective of this project is to design a butterfly valve and apply GD&T to it's components and final assembly using Siemens NX.

INTRODUCTION

A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a 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. The valve may also be opened incrementally to throttle flow.There are different kinds of butterfly valves, each adapted for different pressures and different usage.

COMPONENTS OF BUTTERFLY VALVE

1)BODY - BUTTERFLY VALVE

Butterfly valves are usually fixed between two pipleines using flange couplings.

2)SHAFT - BUTTERFLY VALVE

The disc/plate, lever and nut are assembled to this shaft.

3)DISC - 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.

4) LEVER - BUTTERFLY VALVE

Lever is mounted at an end of shaft outside the body. Hand lever is usually used in small sized Butterfly valves. It is used to open or close the valve.

5) RETAINER - BUTTERFLY VALVE

Retainer is a kind of washer fixed on the body of butterfly valve.

6. NUT - BUTTERFLY VALVE

It is fixed at the top end of shaft to keep the lever and retainer on position relative to the body of butterfly valve

ASSEMBLY - BUTTERFLY VALVE

CONCLUSION

Butterfly valve was successfully designed and GD&T applied to all parts and the assembly of the Butterfly valve.