dDR GURUDUTT SAHNI ,BALPREET SINGH

IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)

International Research Journal of Management Science & Technology http://www.irjmst.com Page 188

TO PERFORM THE STRUCTURALANALYSIS ON WEDGE TYPE GATE

VALVE AND ITS OPTIMIZATION USING FEA

DR GURUDUTT SAHNI a, BALPREET SINGH b a (HOD & DGM (Design,Drawing& Development) LEADER VALVES LTD

JALANDHAR,PUNJAB,INDIA)&C Eng( INSTITUTION OF ENGINEERS

INDIA),[email protected]

b (SCHOLAR,DEPTT OF MECH ENGG (100101128373)

BEANT COLLEGE OF ENGG&TECH GURDASPUR,PUNJAB,INDIA)

[email protected]

ABSTRACT: STRESS ANALYSIS are

one of important consideration while

determining different properties of

valves. A model of each element of Gate

Valve is developed in SOLID WORKS,

and analyzed in ANSYS.

STRUCTURAL LOAD and STRESS

analysis are done by FEA using

ANSYS and validation is supported by

stress analysis using classical theory of

mechanics. Finally, the result obtained

from FEA software and classical

analytical theory is compared.MAIN

OBJECTIVES ARE

1.TO STUDY EFFECT OF

DIFFERENT STRUCTURAL LOAD

AND STRESSES ON WEDGE GATE

VALVE

2.TO SEE HOW STRUCTURAL

LOAD ANALYSIS HELPS IN

MODIFICATION IN DESIGN OF

WEDGE GATE VALVE.

KEYWORDS:WEDGE GATE

VALVE,STRUCTURAL

ANALYSIS,STRESS ANALYSIS

INTRODUCTION

A WEDGE Gate Valve,is a valve that

opens by lifting a round or

rectangular gate/wedge out of the path of

the fluid. The distinct feature of a gate

valve is the sealing surfaces between the

gate and seats

are planar. The gate faces can form

a wedge shape or they can be

parallel. Gate valves are sometimes

used for regulating flow, but many

are not suited for that purpose, having

been designed to be fully opened

orclosed. When fully open, thetypical

gate valve has no obstruction in the

flow path, resulting in very low

friction loss and when the gate valve

is closed there are many obstructions in



the flow path which in turn produces

high frictional losses.

PROBLEM IDENTIFICATION &

SOLUTION METHODOLOGY

The various components of the gate

valve as as follows:

VALVEBODY,VALVE

BONNET,GATE,STEM,HAND

WHEEL,WEDGE

MODULES OF PROJECT

Modeling: 3D models of critical

components of Gate Valves are

prepared using (SOLID WORKS). The

detailed dimensions are taken from its

2D drawings.

Importing 3d Model: - 3D model

prepared using SOLID WORKSis

imported into FEA software (ANSYS).

Preferences: 1.STRUCTURAL OR

STATIC analysis method is selected.

Pre-processing: 2.DEFINE ELEMENT

TYPE 3.APPLYMATERIAL

PROPERTIES

1.VALVE BODY (DETAILS

BEFORE MODIFICATION)

BOUNDING BOX

DIMENSIONS

406.0mm

744.5mm

618.0mm

PART MASS 242.0kg

PART VOLUME 3.082e+007 𝒎𝒎𝟑

MESH

RELAVANCE

SETTING

0

NODES 44443

ELEMENTS 22973

STUDY IS DIVIDED INTO TWO PARTS

BEFORE APPLYING MODIFICATION

AFTER APPLYING MODIFICATION

VALVE

BODY



STRUCTURAL LOAD (BEFORE

MODIFICATION)

NAME MINIMUM MAXIMUM

EQUIVALENT

STRESS

6.13e-002

MPA

157.6 MPA

MAXIMUM

PRINCIPAL

STRESS

-15.42 MPA 157.6 MPA

MIMIMUM

PRINCIPAL

STRESS

-60.11 MPA 21.28 MPA

DEFORMATION 0.0mm 0.3223mm

STRUCTURAL LOAD EFFECT ON

VALVE BODY(BEFORE

MODIFICATION)


VALVE BODY RESULT 2(BEFORE

MODIFICATION)


VALVE BODY RESULT 2 VIEW

2(BEFORE MODIFICATION)



HEADING TOWARDS

MODIFICATION WITH NEW

RESULTS


VALVE BODY RESULT 3 MESH

(BEFORE MODIFICATION)

PROBLEM FACED :

RIBS AND FILLETS were

applied on the certain zones of

body where the deformation

resulted out to be more

under simulation of the body.

FIGURE

1

NO OF RIBS AND POSITION

OF RIBS BEFORE

MODIFICATION

RIBS POSITION (BEFORE

MODIFICATION) FIGURE 1

& FIGURE 2

FIGURE 2

SOLUTION :

With the addition of the fillets

and ribs to the areas

subjected to extreme stresses

and deformations were

strengthened and due to

which

after these successful

modifications the magnitude

of stresses and deformation

was

actually decreased to certain

allowable limit



STRUCTURE RESULTS (AFTER

MODIFICATION)

NAME MINIMU

M

MAXIMU

M

EQUIVALEN

T STRESS

7.245e-

002MPA

143.7MPA

MAXIMUM

PRINCIPAL

STRESS

-5.871

MPA

163.0 MPA

MINIMUM

PRINCIPAL

STRESS

-39.62

MPA

32.58 MPA

DFORMATIO

N

0.0mm 9.857e-002

mm

SAFETY

FACTOR

1.74 N/A

CHANGES OBSERVED

MAXIMUM EQUIVALENT STRESS IN

BODY CHANGES FROM 157.6MPA TO

143.7MPA

MAXIMUM PRINCIPAL STRESS IN THE

BODY CHANGES FROM 157.57 MPA

TO163.0 MPA

MINIMUM PRINCIPAL STRESS IN THE

BODY CHANGES FROM 21.28 MPA TO

32.58 MPA

SAFETY FACTOR CHANGES FROM 1.58

TO 1.74

MAXIMUM DEFORMATION IN BODY

CHANGES FROM .3223mm TO .09857 mm


VALVE BODY (AFTER

MODIFICATION)




VALVE BODY RESULT 2(AFTER

MODIFICATION)


VALVE BODY RESULT 2 VIEW 2

(AFTER MODIFICATION)

STRUCTURAL LOAD

EFFECT ON VALVE BODY

RESULT 3 MESH (AFTER

MODIFICATION)

MODIFIED RIBS

DESIGN

FIGURE

1



AS WE CAN SEE CLEARLY DUE

TO ADDITION OF FILLETS AND

RIBS ACROSS THE AREAS

SUBJECTED TO EXTREME

STRESSES AND DEFORMATION

WERE STRENTHENED SO THAT

THEY CAN BEAR THE LOADS

WITHOUT DEFORMATION

CONCLUSION

1.WE CANCLEARLY SEE THAT

VALUE OF STRESS AND

DEFORMATION HAS DECREASED

TO GREAT AMOUNT BY APPLYING

FEA

2.STRUCTURALANALYSIS PLAYS

A VITAL ROLE IN CHECKING

BEHAIVOUR OF VALVE WITH

RESPECT TO DIFFERENT LOAD

CONDITIONS.

REFERNCES

1..Valve handbook by GH pearson

2.Fluids Handling Principles and

practice, 2nd

edition

3. Schweitzer, Philip A., Handbook of

Valves

4.Maliska, C. R., Computational Fluid

Mechanics and Heat Transfer, LTC

Editing, 2004 (in portuguese)

ADDITION OF FILLETS AND

RIBS ACROSS THE AREA OF

VALVE BODY

FIGURE

2

RIBS POSITION (AFTER

MODIFICATION) FIGURE 1

& FIGURE 2

dDR GURUDUTT SAHNI ,BALPREET SINGH

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