using belleville springs in sealing applications to reduce fugitive emissions n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Using Belleville Springs in Sealing Applications to Reduce Fugitive Emissions PowerPoint Presentation
Download Presentation
Using Belleville Springs in Sealing Applications to Reduce Fugitive Emissions

Loading in 2 Seconds...

play fullscreen
1 / 42

Using Belleville Springs in Sealing Applications to Reduce Fugitive Emissions - PowerPoint PPT Presentation


  • 196 Views
  • Uploaded on

Using Belleville Springs in Sealing Applications to Reduce Fugitive Emissions. George P. Davet Solon Manufacturing Co. Belleville Springs Division . Presenter. George Davet – B.S.M.E., M.B.A. Vice President/Chief Engineer, Solon Manufacturing Co.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Using Belleville Springs in Sealing Applications to Reduce Fugitive Emissions' - yana


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
using belleville springs in sealing applications to reduce fugitive emissions

Using BellevilleSprings in Sealing Applications to Reduce Fugitive Emissions

George P. Davet

Solon Manufacturing Co.Belleville Springs Division

presenter
Presenter

George Davet – B.S.M.E., M.B.A.

Vice President/Chief Engineer, Solon Manufacturing Co.

  • George Davet, B.S.M.E., M.B.A., has been with Solon Manufacturing Company since 1993.  He currently holds the position of Vice President/Chief Engineer for the Belleville Springs and Pressure Switch Divisions. His responsibilities include overseeing new product design, R&D testing programs, and application assistance for all of Solon Manufacturing’s products. George has written and published articles on the application of Belleville Springs. He has also presented to the valve industry on live loading applications.
  • George received his BSME from Case Western Reserve University in Cleveland, Ohio.  He received his MBA from Case Western Reserve University’s Weatherhead School of Management.
slide3

Section IBelleville Spring Definition and Theory?

  • Section IIApplications of Belleville Springs
  • Section IIIHow to Select a Belleville Spring
typical belleville spring
Typical Belleville Spring

Comprised of 5 Main Components

  • Outside Diameter
  • Inside Diameter
  • Material Thickness
  • Overall Height
  • Deflection or Movement (h)

OD

H

h

T

ID

load deflection curve

Typical Load Curve

for a

BellevilleSpring

Load/Deflection Curve

Other Multiple Load/ Deflection Possibilities depending on the design of the Belleville Spring

single belleville spring

1500 lb. Flat Load

(Example)

1500

1250

1000

750

500

0

20

0

10

15

Single Belleville Spring

Load

Deflection

belleville spring with 1500lb 6889kg flat load

Flat

100%

No Load

0%

33%

66%

0lbs/0kg

1000lbs/454kg

500lbs/227kg

1500lbs/680kg

Belleville Spring with 1500lb/6889kg Flat Load
stacking arrangements of solon belleville springs

Series

Doubles deflection

No load increase

Parallel / Series

Doubles load

Doubles deflection

Parallel

Doubles load

No deflection increase

Single

Specific load and deflection

Stacking Arrangements of Solon Belleville Springs

Flat load, deflection, or both may be altered by stacking Belleville springs in various arrangements

deflection chart

1250

1000

Load

750

500

250

0

60

0

20

40

Deflection Chart

Deflection

typical orientation
Typical Orientation

Belleville Spring

Flat

100%

Belleville Spring with

No Load

0%

lng joint diagram without bellevilles
LNG Joint Diagram without Bellevilles

Preload= 40,000 LBS.

Residual Load= 16,000 LBS.

Bolt Stretch =.005

DTE= .003

lng joint diagram with a belleville
LNG Joint Diagram with a Belleville

Load= 40,000 LBS

Residual Load= 35,200 LBS

Deflection= .025

DTE= .003

flange live loading
Flange Live Loading

Why Do Bolted GasketedJoints Leak?

why do bolted gasketed joints leak
Why Do Bolted Gasketed Joints Leak?

# 1 Reason

Loss of bolt preload

uncontrolled voc emissions at a typical refinery or chemical plant
Uncontrolled VOC Emissions at a Typical Refinery or Chemical Plant

= 609

= 93%

*Source: Protocol for Equipment Leak Emissions Estimates, EPA-453/R-95-017

selection factors for flange washer materials
Selection Factors for Flange Washer Materials
  • Operating Temperature
    • ½ Process Temperature (non-insulated)
  • Gasket Material
  • Gasket Stress/Bolt Stress
  • Environment
    • Chlorides or Fluorides
  • Insulation
flange washer materials
Flange Washer Materials
  • H-13 Tool Steel
  • 17-7 PH Stainless Steel
  • Inconel 718
  • Other materials available
installation
Installation

Recommended for non H-13 Applications with high load requirements

Recommended with bolt tension

benefits to using flange washers
Benefits to Using Flange Washers
  • Create a More Reliable Flange Assembly
    • Even load distribution
    • Maintains residual gasket/bolt load
  • Simplified Installation
    • Can be used with any bolting technique (torque wrench, tensioners, slug wrench)
benefits to using flange washers1
Benefits to Using Flange Washers
  • Cost Savings
    • No need to hot tighten
    • Reusable
    • Longer gasket life
    • Lower fugitive emissions
    • Less down time
    • NO LEAKS !!!!!
what is valve live loading
What is Valve Live Loading?

The addition of Belleville Springs to the gland follower studs maintains the packing load of the valve.

which valves are candidates for live loading
Which Valves are Candidates for Live Loading?
  • Frequently cycled valves
  • Operated valves (air or motor)
  • Critical applications
  • Safety or difficult location
  • History of packing leaks
  • Monitored valves
reasons for valve leaks
Reasons for Valve Leaks?
  • Wrong packing for the application
  • Bent, scored, or pitted valve stems
  • Improper packing installation
  • Infrequent use
  • Frequent or high cycles
  • Loss of Packing Load
live loading comparison

With

Live Load

Without

Live Load

Live Loading Comparison

34.5

5000

3000

Packing Compressive Stress (MPa)

20.7

Packing Compressive Stress (PSI)

0

5

10

In - Service Consolidation (%)

other live loaded areas
Other Live Loaded Areas

Live Loaded Bonnet

BellevilleSprings

ball valves live loaded ball seat
Ball ValvesLive Loaded Ball Seat

Live Loaded Gland

Seat Springs

select material
Select Material

Considerations:

  • Bolt Material
  • Temperature
  • Environment
  • Application
  • Cost
  • Availability
17 7 ph stainless steel
17-7 PH Stainless Steel

ASTM A693

  • Most widely used
  • Operating temperature range
    • -400ºF/-240ºC to 550ºF/288ºC
  • For indoor/outdoor service and corrosive atmospheres
    • NOT recommended for chloride or fluoride applications without plating
  • Suitable for cryogenic applications
  • Highly magnetic
  • Available Sulfamate Nickel plated (AMS 2424D)
301 stainless steel
301 Stainless Steel

ASTM A666

  • Operating temperature range
    • -400ºF/-240ºC to 550ºF/288ºC
  • For indoor/outdoor and corrosive atmospheres
  • Slightly magnetic
  • Finish: scale free and deburred
inconel 718
Inconel 718

ASTM B637

  • Operating temperature range
    • -400ºF/-240ºC to 1100ºF/593ºC
  • For high temperature or corrosive atmospheres
  • Indoor/outdoor service
  • Non-magnetic
h 13 tool steel
H-13 Tool Steel
  • Operating temperature range
    • Ambient to 1100ºF/593ºC
  • For indoor/outdoor, high temperature service
  • Fully magnetic
  • Finish: machined & lightly oiled

ASTM A681

select the correct size
Select the Correct Size
  • ID- Inside Diameter
  • OD- Outside Diameter
  • Stacking Constraints
  • Load
questions we will ask
Questions We Will Ask
  • Bolt Size
  • Bolt Material
  • Temperature
  • Environment
  • Application (valve, flange, other)
  • Size Constraints
  • Aim Preload
slide42

Thank you for your time.

  • George Davet Solon Manufacturing Co.