Rubber Bellow

THE STRESS RELIEVERS

SPIROVENT

SPIROVENT

STRESS RELIEF

Product DataPART 2

RUBBERBELLOWS

CONTENTS

Rubber Bellows EPDM, BUTYL, PERBUNAN NBR

Rubber Bellows EPDM PLANTLINK

Anti-Vibration Joints Stainless Steel

Product Application Product Code Page No.

EPDM Untied (R) ChW, LTHW EA65-E . . . . . . . . . . . . . . . . . . . . . . . .4EPDM Tied (R) ChW, LTHW EA66-E . . . . . . . . . . . . . . . . . . . . . . . .5Untied (A) Large Movement EA67-E,B,P . . . . . . . . . . . . . . . . . . . .6Tied (A) Large Movement EA68-E,B,P . . . . . . . . . . . . . . . . . . . .7

Untied (AS) High Temperature EA53-E,P . . . . . . . . . . . . . . . . . . . . . .8Tied (AS) High Temperature EA58-E,P . . . . . . . . . . . . . . . . . . . . .9

Untied (A) Screwed Connections EA63-E,B,P . . . . . . . . . . . . . . . . . . . 10Untied (AS) Screwed Connections EA54-E,P . . . . . . . . . . . . . . . . . . . . .11


EPDM Untied ChW, LTHW PL61 . . . . . . . . . . . . . . . . . . . . . . . . .13EPDM Tied ChW, LTHW PL62 . . . . . . . . . . . . . . . . . . . . . . . . .14


Stainless Steel Tied HTHW EA46/49 . . . . . . . . . . . . . . . . . . . . . .15

Subject Page No.

Selecting Rubber Bellows . . . . . . . .3Effective Areas . . . . . . . . . . . . . . . .12Noise Isolation Graphs . . . . . . . . .12Installation Instructions . . . . . . .16/17Product Identification . . . . . . . . . . .18

DISCLAIMEREvery effort has been made to ensure the accuracy of these datasheets, however we cannot accept responsibility for any errors. Theproduct sketches are only indicative and may not accurately reflectthe construction of the units. Full dimensional drawings areavailable on request. Engineering Appliances reserves the right tomake product changes without prior notification.

October 2001

Engineering Appliances2

Technical Information

APPLICATIONRubber Bellows are primarily used to absorb noiseand vibration between rotating equipment such aspumps or chillers and pipework. Their high flexibilityalso makes them suitable for compensating smallinstallation misalignments. Rubber Bellows can beused just like a metal expansion joint to compensatefor axial, lateral or angular movement. as any otherunrestrained expansion joint, rubber bellows willextend under pressure. Their pressure thrusthowever varies with length as the shape of thebellows change. However the forces involved arejust as large. The pressure thrust is calculated bymultiplying the cross sectional area, times themaximum pressure. To prevent the bellows fromextending, the pipework needs to be anchored.Typical applications are taking up thermal expansionin plastic pipework or noise isolation in smalldiameter pipework at low pressures. EA Stenflexbellows are thin walled and therefore extremelyflexible, ensuring the highest degree of noise andvibration isolation.

SELECTIONNot all rubber bellows are the same. To ensure along and trouble free working life, it is vital to selectthe right bellows for the application. Temperatureand pressure are the most important, but not the onlycriteria that needs to be considered.

PRESSUREMost bellows in these data sheets are rated at amaximum pressure of 16 bar g. However this needsto be de-rated at temperatures above 50˚C as thefactor of safety is reduced.

TEMPERATUREThe maximum temperature ratings vary for thedifferent type of bellows. Nylon reinforced bellowsshould never be used at temperatures above 90˚C.Steel wire mesh reinforced bellows such as theEA53 or the EA58 may be used up to 100˚C. Forservice above 100˚C, only a stainless steel bellowswill give an acceptable service life (EA49).

MEDIUMEPDM rubber is the most suitable for heating andchilled water. For HWS or cold water services, agood quality Butyl is recommended such as theEA67-B or the EA68-B. For duty with oil or oilcontaminated water EPDM is unsuitable and abellows with a Perbunan inner liner should beselected such as the EA67-P or the EA68-P.LIFEAll rubber bellows have a limited life. Rubber is an

organic compound which will age with time. The lifeis determined by external influences such asultraviolet light, ozone etc., but the main influence istemperature. The higher the working temperature,the shorter the life expectancy.When making a selection it is not just important tostate the maximum working conditions, but also therequired life.The life expectancy of nylon reinforced bellowsdeteriorates rapidly at temperatures above 70˚C.Where temperatures are continuous throughout theyear, steel wire reinforced bellows such as the EA53and the EA58 should be considered.

LOCATIONThe location and the importance of the installationshould also be considered. At the end of the servicelife a nylon reinforced bellow can failcatastrophically.This can have grave consequences in rooftopinstallations for example or in vital systems such ashospitals. In these cases a steel wire meshreinforced bellows is preferable as it is much lesslikely to fail (EA53/58).

QUALITYEA Stenflex bellows are of the highest qualitystandard. They are manufactured in Europe understrict quality control. All bellows have their date ofmanufacture moulded into the body. The steel wiremesh reinforced bellows Stenflex type AS, EA53 andEA58 (up to 200mm NB) have been type approvedby the German TUV to DIN4809 (The use of rubberbellows in heating systems). This standard requiresthat bellows after a service life of 10 years at 100˚Cmust have a burst pressure of not less than 30 bar.The type AS is marked accordingly and each bellowshas a unique number for full traceability.All the bellows shown in these data sheets can besupplied with material specification.

INSTALLATION AND MAINTENANCEComprehensive Installation instructions accompanyeach delivery of bellows. These must be followed toensure maximum service life. They also includeinstructions for care and maintenance.

INTRODUCTION TO RUBBER BELLOWS



ApplicationsThe EA65 range of rubber bellows are designed to absorbnoise and vibration occurring from rotating or reciprocatingplant such as pumps, chillers or air handling units. Theymay also be used to compensate for thermal expansion orsettlement. EPDM rubber has very good hot waterproperties and is resistant to acids. It has poor resistanceto hydrocarbons.These bellows must be restrained by suitable anchors.

Operating ParametersMaximum Working Pressure: 16 bar g at 50˚C

10 bar g at 90˚CAllowable Test Pressure: 21 bar gBurst Pressure: >45 bar gVacuum: Support Rings may be

requiredTemperature Range: -40˚C to + 90˚CMinimum Design Life: 5 years at 82˚C

Flange OptionsBS4504-PN16 as standardAlternative Flange drillings on request.

*not simultaneously

SpecificationEngineering Appliances rubber bellows type EA65 with EPDMrubber liner and high tensile synthetic fibre reinforcement andsteel wire reinforced raised faces fitted with flanges drilled toBS4504 PN16 in carbon steel with integral bellows stabilisingcollar.

MaterialsLiner: EPDM RubberReinforcement: Synthetic Fibre Cover: EPDM RubberFlanges: Carbon Steel type ST37.2 - Zinc plated

IdentificationColour Code: Orange triangleMarkings: Stenflex ‘R’, Date of Manufacture, Size,

Pressure rating.

RUBBER BELLOWS EA 65-ESTENFLEX (R) EPDM NYLON UNTIED

Nominal Supplied Inside Sealing Axial Movement Movement

Diameter Length Diameter Face OD Compress Extens. Lateral Angular ProductCode

mm mm mm mm mm mm mm degrees

32 130 45 85 20 10 10 20 EA65-032-E 40 130 45 85 20 10 10 20 EA65-040-E 50 130 56 95 20 10 10 20 EA65-050-E65 130 72 115 20 10 10 15 EA65-065-E80 130 84 127 20 10 10 15 EA65-080-E

100 130 109 151 20 10 10 8 EA65-100-E125 130 133 178 20 10 10 8 EA65-125-E150 130 161 206 20 10 10 7 EA65-150-E200 130 209 260 20 10 10 5 EA65-200-E


SpecificationEngineering Appliances rubber bellows type EA66 withEPDM rubber liner and high tensile synthetic fibrereinforcement and steel wire reinforced raised faces fittedwith flanges drilled to BS4504 PN16 in carbon steel withintegral bellows stabilising collar and adjustable tie barassembly.

MaterialsLiner: EPDM RubberReinforcement: Synthetic Fibre Cover: EPDM RubberFlanges: Carbon Steel type ST37.2 - Zinc plated Tie bars: 8.8 carbon steel Zinc platedIsolation Up to 150mm N.B EPDM rubber top hats,200mm and above - spherical washers, steel galvanisedIdentificationColour Code: Orange triangleMarkings: Stenflex ‘R’, Size, Date of Manufacture,

Pressure rating.

RUBBER BELLOWS EA66-ESTENFLEX (R) EPDM NYLON TIED

ApplicationsThe EA66 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. They may also be usedto compensate for thermal expansion or settlement. EPDMrubber has good hot water properties and is resistant to acids. Ithas poor resistance to hydrocarbons. These bellows do notrequire anchors.


10 bar g at 90˚CAllowable Test Pressure: 21 bar gBurst Pressure: >45 bar gVacuum: Support Rings may be requiredTemperature Range: -40˚C to + 90˚CMinimum Design Life: 5 years at 82˚C


Nominal Supplied Inside Sealing No. of PressureDiameter Length Diameter Face OD Tie bars Rating Movement Lateral Product

Codemm mm mm mm bar g +/-mm

32 130 45 85 2 16 10 EA66-032-E40 130 45 85 2 16 10 EA66-040-E50 130 56 95 2 16 10 EA66-050-E65 130 72 115 2 16 10 EA66-065-E80 130 84 127 2 16 10 EA66-080-E

100 130 109 151 2 16 10 EA66-100-E125 130 133 176 2 16 10 EA66-125-E150 130 161 206 2 16 10 EA66-150-E200 130 209 260 3 10 10 EA66-200-E250 130 262 313 3 10 10 EA66-250-E300 130 312 363 4 10 10 EA66-300-E


SpecificationEngineering Appliances rubber bellows type EA67 with EPDM,Butyl or Perbunan rubber liner and high tensile synthetic fibrereinforced body fitted with flanges drilled to BS4504 PN16 incarbon steel with integral bellows stabilising collar.

MaterialsLiner: EPDM , Butyl or PerbunanReinforcement: Synthetic Fibre Cover: EPDM Rubber**Flanges: Carbon Steel type ST37.2 - Zinc plated

IdentificationColour Code: EPDM - Orange band

Butyl - White bandPerbunan - red band

Markings: Stenflex ‘A’, Size, Date of Manufacture, Pressure rating.

ApplicationsThe EA67 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. They may also be usedto compensate for thermal expansion or settlement.EPDM rubber has very good hot water properties and isresistant to acids. It has poor resistance to hydrocarbons. TheButyl liner option is suitable for drinking water, and the PerbunanN liner is oil resistant.These bellows require suitable anchors.

* Not simultaneously.

** Perbunan bellows have an external cover of weather resistantChloropren rubber (CR).




RUBBER BELLOWS EA67-E,B,PSTENFLEX (A) EPDM, BUTYL OR PERBUNAN NYLON UNTIED

Nominal Supplied Inside Sealing Spring Rate Axial Movement* Movement* Product CodeDiameter Length Diameter Face OD Axial Compress Extens. Lateral Angular EA67-***-E EPDM

EA67-***-B BUTYLmm mm mm mm N/mm mm mm +/-mm Degrees EA67-***-P PERBUNAN

25 100 23 51 26 20 10 10 25 EA67-025-E,B,P32 125 37 73 21 35 10 15 25 EA67-032-E,B,P40 125 37 73 21 35 10 15 25 EA67-040-E,B,P50 125 46 85 26 35 10 15 25 EA67-050-E,B,P65 125 62 104 44 35 10 15 25 EA67-065-E,B,P80 150 76 117 17 35 10 15 20 EA67-080-E,B,P100 150 96 136 32 35 10 15 15 EA67-100-E,B,P125 150 121 165 26 35 10 15 15 EA67-125-E,B,P150 150 146 190 26 35 10 15 12 EA67-150-E,B,P200 175 200 266 21 45 15 15 8 EA67-200-E,B,P250 175 250 316 27 45 15 15 7 EA67-250-E,B,P300 200 300 375 33 45 15 15 6 EA67-300-E,B,P350 200 350 427 57 45 15 15 6 EA67-350-E,B,P400 200 400 477 93 45 15 15 5 EA67-400-E,B,P

RUBBER BELLOWS EA68-E,B,PSTENFLEX (A) EPDM, BUTYL OR PERBUNAN NYLON TIED


ApplicationsThe EA68 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. They may also be usedto compensate for thermal expansion or settlement.EPDM rubber has very good hot water properties and isresistant to acids. It has poor resistance to hydrocarbons. TheButyl liner option is suitable for drinking water, and the PerbunanN liner is oil resistant.These bellows do not require anchors.

* Perbunan bellows have external cover of weather resistant Chloropren rubber (CR).




SpecificationEngineering Appliances rubber bellows type EA68 with EPDM,Butyl or Perbunan rubber liner and high tensile synthetic fibrereinforcement and steel wire reinforced raised faces fitted withflanges drilled to BS4504 PN16 in carbon steel with integralbellows stabilising collar and adjustable tie bar assembly.MaterialsLiner: EPDM Butyl or Perbunan Reinforcement: Synthetic Fibre Cover: EPDM Rubber*Flanges: Carbon Steel type ST37.2 - Zinc platedTie Bars: 8.8 Carbon Steel Zinc platedIsolation: Up to 150mm N.B. EPDM rubber top hats,

200mm and above - spherical washers,Steel Zinc plated.

IdentificationColour Code: EPDM -Orange band

Butyl - White bandPerbunan - Red band

Markings: Stenflex ‘A’, Date of Manufacture,Pressure rating, Size

25 100 23 51 16 2 10 EA68-025-E,B,P

32 125 37 73 16 2 15 EA68-032-E,B,P40 125 37 73 16 2 15 EA68-032-E,B,P50 125 46 85 16 2 15 EA68-050-E,B,P65 125 62 104 16 2 15 EA68-065-E,B,P80 150 76 117 16 2 15 EA68-080-E,B,P

100 150 96 136 16 2 15 EA68-100-E,B,P125 150 121 165 16 2 15 EA68-125-E,B,P150 150 146 190 16 2 15 EA68-150-E,B,P200 175 200 266 10 3 15 EA68-200-E,B,P250 175 250 316 10 3 15 EA68-250-E,B,P300 200 300 375 10 4 15 EA68-300-E,B,P

200 175 200 266 16 3 15 EA68-200-E5,B5,P5250 175 250 316 16 4 15 EA68-250-E5,B5,P5300 200 300 375 16 5 15 EA68-300-E5,B5,P5

Nominal Supplied Inside Sealing Pressure No. of Movement Product Code

Diameter Length Diameter Face OD Rating Tie bars Lateral EA68-***-E EPDMEA68-***-B BUTYLEA68-***-P PERBUNAN

mm mm mm mm bar g +/-mm 16 bar g


SpecificationEngineering Appliances rubber bellows type EA53 withEPDM rubber liner and corrosion resistant steel wire meshreinforced body fitted and raised faces fitted with flangesdrilled to BS4504 PN16 in carbon steel with integral bellowsstabilising collar.

MaterialsLiner: EPDM Rubber or PerbunanReinforcement: Corrosion resistant Steel Wire Cover: EPDM Rubber**Flanges: Carbon Steel type ST37.2 - Zinc plated

IdentificationColour Code: EPDM - Orange and Blue band

Perbunan - Red and Blue bandMarkings: Stenflex ‘AS’, Date of Manufacture,

Size, Pressure rating, Batch No.

RUBBER BELLOWS EA53-E,PSTENFLEX (AS) EPDM OR PERBUNAN STEEL UNTIED

ApplicationsThe EA53 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. The EA53 with its steelwire mesh reinforced body is particularly suitable for use onheating up to 100˚C and where reliable operation and a longservice life is of paramount importance.EPDM rubber has very good hot water properties and is resistantto acids. It has poor resistance to hydrocarbons.The Perbunan N rubber liner option is oil resistant.These bellows require suitable anchors.

Type approvalsThe EA53 unit, Stenflex type AS has been approved by theGerman TUV to DIN4089, PRUFNR 910 10 30. Flame resistanttest in engine and plant rooms, German Lloyd. GL-NR 33576HH



Flange OptionsBS4504-PN16 as standardAlternative Flange drillings on request

* Not simultaneously.

** Purbunan bellows have external cover of weather resistantChloropren rubber (CR).

Nominal Supplied Inside Sealing Spring Rate Axial Movement* Movement* ProductDiameter Length Diameter Face OD Axial Compress Extens Lateral Angular Code

mm mm mm mm N/mm mm mm +/-mm Degrees EA53-***-E EPDMEA53-***-P PERBUNAN

32 125 37 73 34 30 10 10 25 EA53-032-E,P

40 125 37 73 34 30 10 10 25 EA53-040-E,P50 125 46 85 25 30 10 10 25 EA53-050-E,P65 125 62 104 36 30 10 10 25 EA53-065-E,P80 150 76 117 25 40 10 10 20 EA53-080-E,P

100 150 96 136 34 40 10 10 15 EA53-100-E,P125 150 121 165 20 40 10 10 15 EA53-125-E,P150 150 146 190 25 40 10 10 12 EA53-150-E,P200 175 200 266 65 45 15 15 8 EA53-200-E,P250 175 250 316 120 45 15 15 7 EA53-250-E,P300 200 300 375 120 45 15 15 6 EA53-300-E,P350 200 350 427 120 45 15 15 5 EA53-350-E,P400 200 400 477 120 45 15 15 5 EA53-400-E,P


ApplicationsThe EA58 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. The EA58 with its steelwire reinforced body is particularly suitable for use on heatingup to 100˚C and where reliable operation and a long service lifeis of paramount importance.EPDM rubber has very good hot water properties and isresistant to acids. It has poor resistance to hydrocarbons. ThePerbunan N rubber liner option is oil resitant.These bellows do not require anchors.

Type approvalsThe EA58 unit, Stenflex type AS has been approved by theGerman TUV to DIN4089, PRUFNR 910 10 30. Flame resistanttest in engine and plant rooms, German Lloyd. GL-NR 33576HH



Flange OptionsBS4504-PN16 as standardAlternative Flange drillings available on request.

* Perbunan bellows have external cover of weather resistantChloropren rubber (CR).

SpecificationEngineering Appliances rubber bellows type EA58 withEPDM or Purbunan rubber liner and corrosion resistantsteel wire mesh reinforced body fitted with flanges drilled toBS4504 PN16 in carbon steel with integral bellowsstabilising collar.

MaterialsLiner: EPDM Rubber or PerbunanReinforcement: Corrosion resistant Steel Wire Cover: EPDM Rubber*Flanges: Carbon Steel type ST37.2 - Galvanised Tie Bars: 8.8 Carbon Steel GalvanisedIsolation: Up to 150mm N.B. EPDM rubber top hats,

200mm and above - spherical washers,steel galvanised.

IdentificationColour Code: EPDM - Orange and Blue Band

Perbunan - Red and Blue BandMarkings: Stenflex ‘AS’, Date of Manufacture,

Size, Pressure rating, Batch No.

RUBBER BELLOWS EA58-E,PSTENFLEX (AS) EPDM OR PERBUNAN STEEL TIED

Nominal Supplied Inside Sealing Pressure No. of Movement Product Code Diameter Length Diameter Face OD Rating Tie bars Lateral EA58-***-E EPDM

EA58-***-P PERBUNAN

mm mm mm mm bar g +/-mm 16 bar g

32 125 37 73 16 2 10 EA58-032-E,P

40 125 37 73 16 2 10 EA58-040-E,P50 125 46 85 16 2 10 EA58-050-E,P65 125 62 104 16 2 10 EA58-065-E,P80 150 76 117 16 2 10 EA58-080-E,P

100 150 96 136 16 2 10 EA58-100-E,P125 150 121 165 16 2 10 EA58-125-E,P150 150 146 190 16 2 10 EA58-150-E,P200 175 200 266 10 3 15 EA58-200-E,P250 175 250 316 10 3 15 EA58-250-E,P300 200 300 375 10 4 15 EA58-300-E,P

200 175 200 266 16 3 15 EA58-200-E5,P5250 175 250 316 16 4 15 EA58-250-E5,P5300 200 300 375 16 5 15 EA58-300-E5,P5


SpecificationEngineering Appliances rubber bellows type EA63 withEPDM, Butyl, or Perbunan rubber liner and high tensilesynthetic fibre reinforced body, steel wire reinforced raisedface fitted with union ends.

MaterialsLiner: EPDM, Butyl or Perbunan RubberReinforcement: Synthetic Fibre Cover: EPDM rubber*Unions: Mallable iron GTW40 galvanised

IdentificationColour Code: EPDM - Orange band

Butyl - White bandPerbunan - Red band

Markings: Stenflex ‘A’, Date of Manufacture, Size, Pressure rating.

RUBBER BELLOWS EA63-E,B,PSTENFLEX (A) EPDM, BUTYL OR PERBUNAN NYLON UNTIED

ApplicationsThe EA63 range of rubber bellows are designed to absorb noiseand vibration occurring from rotating or reciprocating plant suchas pumps, chillers or air handling units. They may also be usedto compensate for thermal expansion or settlement. EPDMrubber has very good hot water properties and is resistant toacids. It has poor resistance to hydrocarbons. The Butyl lineroption is suitable for drinking water and the Perbunan N liner isoil resistant.


10 bar g at 90˚CAllowable Test Pressure: 21 bar gBurst Pressure: >45 bar gTemperature Range: -40˚C to +90˚CMinimum Design Life: 5 years at 82˚C

Type ApprovalsThe EA 63-***-B type has been approved by the German HealthAuthority for use with drinking water.


Nominal Supplied Inside End Axial Movement Product CodeDiameter Length Diameter Connections

Compress. Extens. EA63-***-E EPDMEA63-***-B BUTYL

mm mm mm mm EA63-***-P PERBUNAN

20 148 23 3/4” BSP 20 10 EA63-020-E,B,P

25 150 23 1” BSP 20 10 EA63-025-E,B,P32 187 37 1 1/4” BSP 35 10 EA63-032-E,B,P40 189 37 1 3/4 ” BSP 35 10 EA63-040-E,B,P


SpecificationEngineering Appliances rubber bellows type EA54 withEPDM or Perbunan rubber liner and corrosion resistant steelwire reinforced body and raised faces, steel wire reinforcedraised face fitted with union ends.

MaterialsLiner: EPDM or Perbunan RubberReinforcement: Corrosion resistant Steel WireCover: EPDM Rubber*Unions Malleable iron GTW40 - Galvanised

IdentificationColour Code: EPDM - Orange and blue band

Perbunan - Red & Blue band

Markings: Stenflex ‘AS’, size, Date of Manufacture, Pressure rating, Batch No.

RUBBER BELLOWS EA54-E,PSTENFLEX (AS) EPDM OR PERBUNAN STEEL UNTIED

ApplicationsThe EA54 rqange of rubber bellows are designed to absorbnoise and vibration occurring from rotating or reciprocating plantsuch as pumps, chillers or air handling units. The EA54 with itssteel wire reinforced body is particulary suitable for use onheating up to 100

o C and where reliable operation and long

service life is of paramount inportance. EPDM rubber has verygood hot water properties and is resistant to acids. It has poorresistance to hydrocarbons. The Perbunan N rubber liner optionis oil resistant.

Operating ParametersMaximum Working Pressure: 16 or 10 bar g at 50

o C

10 bar g up to 100˚C

Allowable Test Pressure: 24 bar gBurst pressure: >60 bar gTemperature range: -40 to 100

oC

Minimum Design Life: 10 years at 100˚C

Type ApprovalsThe EA54 unit, Stenflex type AS has been approved by theGerman TUV to DIN4089, PRUFNR 910 10 30. Flame resistanttest in engine and plant rooms, German Lloyd. GL-NR33576HH.


Nominal Supplied Inside End Axial Movement Product CodeDiameter Length Diameter Connections Compress. Extens. EA54-***-E EPDM

EA54-***-P PERBUNANmm mm mm mm

32 187 37 1 1/4” BSP 35 10 EA54-032-E,B40 189 37 1 1/2” BSP 35 10 EA54-040-E,B

TECHNICAL INFORMATIONPRESSURE THRUST FACTOR IN cm 2


Diagrams 1 & 2The diagrams show thedegree of reduction ofstructure - and water- bornenoise depending on theoperating pressure, whenusing rubber compensatorstype AS.The isolation properties arescarcely different from thevalues achieved by bellowswith nylon reinforcements.It is worth noting that the noisereduction values of 20 dBAcorrespond to an isolationefficiency of approx. 90%

The tests were carried outon the basis of the soundprotection requirements asper DIN 4809

NOISE ISOLATION

water-borne noisediagram 2

structure-borne noisediagram 1

SIZE EA65 EA67/EA63 EA53

20 - 18 -25 - 1832 5 28 2840 5 28 2850 10 40 4065 15 68 6880 40 108 108100 50 124 124125 110 187 187150 200 245 245200 350 425 425250 550 610 610300 800 890 890350 - 1130 1130400 - 1400 1400


ApplicationsPlantlink is a budget range of bellows for non criticalapplications. They are much stiffer than Stenflex bellows andtherefore have reduced noise isolation properties. They arerated at 10 bar and must not be used for temperatures whichmay exceed 82ºc. Plantlink bellows have no date stamp and arenot uniquely identified. They should therefore be regularyinspected and a rigid maintenance discipline is recommended.These bellows require suitable anchors.

Operating ParametersMaximum Working Pressure: 10 bar gMaximum working temperature: 85˚CTemperature derated factor: 8 bar g at 85ºCMaximum Design Life: 3 years at 85ºC

Flange OptionsBS4504-PN16 as standardAlso availableBS4504 PN6

* not simultaneously

SpecificationPlantlink rubber bellows TYPE PL61 with EPDM rubber linerand nylon re-inforcements. Carbon steel plated flangesdrilled to BS4504 PN16.MaterialsLiner: EPDM RubberReinforcement: Nylon Cover: EPDM RubberFlanges: Carbon Steel, zinc plated

IdentificationColour Code: Yellow label: Plantlink

RUBBER BELLOWS PL61PLANTLINK EPDM NYLON UNTIED

Nominal Supplied Inside Sealing Axial Movement* Movement* ProductDiameter Length diameter Face OD

Compress Extens Lateral AngularCode

mm mm mm mm mm mm +/-mm Degrees

32 130 33 69 8 4 8 15 PL61-032

40 130 38 69 8 4 8 15 PL61-04050 130 46 85 8 5 8 15 PL61-05065 130 63 105 10 6 10 15 PL61-06580 130 75 116 10 6 10 15 PL61-080

100 130 104 150 12 10 12 15 PL61-100125 130 128 180 12 10 12 15 PL61-125150 130 150 212 12 10 12 15 PL61-150200 130 192 260 22 14 22 15 PL61-200250 130 243 320 22 14 22 15 PL61-250300 130 293 373 22 14 22 15 PL61-300


ApplicationsPlantlink is a budget range of bellows for non criticalapplications. They are much stiffer than Stenflex bellows andtherefore have reduced noise isolation properties. They arerated at 10 bar and must not be used for temperatures whichmay exceed 82ºc. Plantlink bellows have no date stamp and arenot uniquely identified. They should therefore be regularyinspected and a rigid maintenance discipline is recommended.These bellows do not require anchors.

Operating ParametersMaximum Working Pressure: 10 barMaximum working temperature: 85˚CTemperature derated factor: 8 bar g at 85ºCMaximum Design Life: 3 years at 85ºC

Flange OptionsBS4504-PN16 as standardAlso availableBS4504 PN6

SpecificationPlantlink rubber bellows TYPE PL62 with EPDM rubber linerand nylon re-inforcements. Carbon steel plated flangesdrilled to BS4504 PN16.MaterialsLiner: EPDM RubberReinforcement: Nylon Cover: EPDM RubberFlanges: Carbon Steel, zinc plated

IdentificationColour Code: Yellow label: Plantlink

RUBBER BELLOWS PL62PLANTLINK EPDM NYLON TIED

Nominal Supplied Inside Sealing No. of Movement ProductDiameter Length Diameter Face OD Tie bars Lateral Code

mm mm mm mm +/-mm

32 130 33 69 2 8 PL62-032

40 130 38 69 2 8 PL62-04050 130 46 85 2 8 PL62-05065 130 63 105 2 10 PL62-06580 130 75 116 2 10 PL62-080

100 130 104 150 2 12 PL62-100125 130 128 180 2 12 PL62-125150 130 150 212 2 12 PL62-150200 130 192 260 2 22 PL62-200250 130 243 320 3 22 PL62-250300 130 293 373 4 22 PL62-300


SpecificationEngineering Appliances type EA46/49 anti-vibrationbellows with carbon steel flanges drilled to BS4504 -PN16,spirally wrapped multi-ply convoluted bellows with innerand outer plies in corrosion resistant stainless steel,carbon steel tie bars with noise absorbing rubber top hatwashers (EA46) or complete with steel wire mesh washersfor high temperatures (EA49). Bellows are constructed tohave all stainless steel internal surfaces.

MaterialsBellows: Stainless Steel type AISI 316TiTie Bars: Carbon Steel, Zinc Plated, passivatedFlanges: Carbon Steel, Zinc Plated, passivatedTie Bar washers:EA46: Rubber

EA49: Steel wire mesh

ANTI VIBRATION JOINT EA46/49BOA EPSILON STAINLESS STEEL TIED

ApplicationsThe EA46/49 is a multi-ply stainless steel bellows designed toabsorb noise and vibration occurring from reciprocating plantsuch as pumps, compressors, burners generators, dieselengines etc. The spirally wrapped multi-ply construction results ina high degree of isolation. The bellows is constructed from acorrosion resistant stainless steel which offers a long service lifeand a high degree of safety.These bellows do not require anchors.

Operating ParametersMaximum Working Pressure: 16 bar g at 120˚CFor higher temperatures the pressure must be derated.Allowable Test Pressure: 24 bar gTemperature Range: EA46: -40˚C to + 120˚C

EA49: -40˚C to + 300˚C

Minimum Design Life: 15 years

Flange OptionsBS4504-PN16 as standardAlternative Flange drillings available on request.

Non Standard variationsFor all applications where the EA46/49 is not suitableEngineering Appliances can offer purpose designed specialexpansion joints.

Nominal Supplied Movement Spring Rate Bellows Total Wall No. of Pressure Product Diameter Length Lateral Lateral Thickness Tie Bars Rating Code

mm mm +/-mm N/mm mm Bar g

40 130 9 86 1.25 2 16 EA46/49-04050 130 133 1.2 2 16 EA46/49-050 65 130 4.5 244 1.2 2 16 EA46/49-06580 130 6 296 1.2 2 16 EA46/49-080

100 130 5 476 1.2 2 16 EA46/49-100125 130 4 881 1.5 2 16 EA46/49-125150 130 3 1285 1.5 3 16 EA46/49-200250 130 1 13224 2 6 16 EA46/49-250300 130 0.9 30167 2 8 16 EA46/49-300

A. PRE-INSTALLATION CHECK

1. SELECTIONPrior to installation, check that you have the right bellows for theparticular duty. Rubber bellows have temperature and pressurelimitations. Maximum allowable pressures need to be derated attemperatures above 50˚C.See EA data sheets for allowable pressures and temperatures. Allrubber bellows will extend under pressure. These pressure thrust forcescan be very substantial at pressures above 2 bar and 65mm n.b. sizeUnless the pipe work can be sufficiently anchored a tied bellows shouldbe fitted (see fig.2). Vacuum support rings may be required whenbellows are fitted to suction side of pumps and where vacuum conditionscould occur.

2. MATING FLANGESWe recommend that the rubber bellows are mated up against full boreweld neck flanges (see fig.3.). If installed in this manner no additionalgaskets are required.We advise against using slip on or screwed flanges as mating flanges asthese can damage the rubber bellows. Once the sealing face has beendamaged medium will penetrate the reinforcement layers and destroythe integrity of the bellows.If it is unavoidable to use this type of mating flange, a gasket must beused (this should be a hard gasket such as Klingerite and be at least3mm thick. The gasket should reach the internal bore of the rubberbellows (see fig.4.). Another option is to fill the gap of the slip on flangewith weld and grind it flush (see fig.5.).

3. MISALIGNMENTCheck that the two mating flanges are parallel and that they are in line(maximum allowed offset is 5mm in any direction). The gap betweenflanges should be within +/- 5mm of the bellows neutral length (seefig.6.).Ensure that the pipework is adequately supported. The bellows mustmust not support pipes or plant.

B. INSTALLATION

1. BOLTSBolts should be inserted from the bellows side (see fig.3.). On somelarger sizes this may not be possible. In that case a bolt of the exactlength needs to be selected. An alternative is to use studding cut tolength and fitted with a nut at both sides (see fig.7.). This is important asthe bellows will increase in diameter under pressure. Even if there isspace between the bolt and bellows in an unpressurised state, they mayfoul when pressurised.Bolts of the right diameter must be used to ensure correct alignment.

2. ALIGNMENTTake care when inserting the bellows into the gap between the twomating flanges. Sharp edges can damage the sealing face of thebellows. Before tightening the bolts, ensure that the bellows fit evenly inits flange groove and does not get pinched between flanges. The sealingface of the bellows must be concentric with the sealing face of the matingflanges.

3. TIGHTENING THE BOLTSGreat care has to be taken with the tightening of the flange bolts.Remember that you are tightening against a rubber face. As withgaskets, overtightening will cause the joints to leak and it will damagethe bellows. “Tighter is definitely not better!”. Tighten opposite bolts to

get an even pressure all round (check the gap between the flanges). Usea torque wrench to tighten the bolts to values listed in table 1. Torque thenuts and not the bolts.Rubber will set and the bolts will have to be retightened after 24 hours.The values given in table 1 are for new bellows only. The torque settingsmay be exceeded by up to 50% without damage to the bellows. Valuesare without pressure in the system.

4. TIE BARSOnce the bellows is fitted, ensure that the tie bars are tight. If necessaryadjust nuts at either end. All tie bars should be at equal length. Whenthree or more tie bars are fitted it may be necessary to remove one tiebar to aid installation. Ensure that washers are reassembled in the rightorder and orientation. A lock nut must be refitted.

C. TAKING CARE OF RUBBER BELLOWS

1. PAINTDo not paint rubber bellows. The paint will attack the rubber. (This alsoapplies to paint splatter).

2. WELDINGProtect the rubber from weld spatter. When welding, always ensure thatthe bellows is bridged using a continuity strap (applies to the type ‘AS’only).

3. LAGGINGDo not lag rubber bellows on heating systems. The increasedtemperature will reduce the life of the bellows.

4. TIE BAR CHECKOnce the system is filled but not under pressure, check that the tie barsare still tight (pipework on springs may have dropped due to the weightof the water). Retighten the bars if slack. Note: tie bars should never beslackened off to reduce noise or vibration transmission, major damageto equipment may occur.

5. WATER TREATMENTMost bellows use an EPDM inner liner. EPDM is a proven material inheating and chilled water sytems. It is resistant to glycol and to mostchemicals used in water treatment, when used in normal concentrations.As suppliers of water treatment chemicals are reluctant to giveinformation about their formulations, we cannot approve any specificchemical.Always check with the chemical supplier that the additives are suitablein use with EPDM rubber or any other rubber quality supplied (Butyl,Perbunan). For other mediums check with EA for compatibility.

D. BEST PRACTICEThe following are only recommendations but if followed they will ensurethe maximum service life of the rubber bellows.1. Selection - use nylon reinforced bellows (Stenflex type A or R) onchilled water, condenser water, hot water services etc. and steel wirereinforced bellows on heating (Stenflex type AS).2. Fitting - we recommend the use of stool pieces to align mating flangesand to ensure the correct gap. (They are available from EA).3. System - when the bellows are installed on rotating equipment suchas pumps to absorb noise and vibration, the pipework either side of thebellows should be guided. This ensures that the bellows moves and notthe pipework (see fig. 8) thus acting as an acoustic break.


INSTALLATION INSTRUCTIONSRUBBER BELLOWS


INSTALLATION INSTRUCTIONSRUBBER BELLOWS (Figs.)

Untied Bellows Fig.1. Tied Bellows Fig.2. Full bore weld neck flange Fig.3.

Slip on mating flanges Fig.4. Gap filled with weld then groundflush Fig.5.

Max. allowed offset +/-5.0mm Fig.6.Gap = bellows length +/-5.0mm

Use of studding Fig.7. Pipe guides/anchors on rotatingequipment Fig.8.

Torque Settings Table.1.

70

50

40

25

20

15

15

20

15

15

300

250

200

150

125

100

80

65

50

32/40

Torque Setting(Nm)

Nominal Boremm


DISCLAIMEREvery effort has been made to ensure the accuracy of these datasheets, however, we cannot accept responsibility for any errors. Theproduct sketches are only indicative and may not accurately reflect theconstruction of the units. Full dimensional drawings are available uponrequest. Engineering Appliances reserves the right to make productchanges without prior notification.

abcdefCertificate No. 961690

October 2001


STENFLEX BELLOWSIDENTIFICATION

EA 61 or 62Stenflex type GR(now obsolete)

ORANGEEA 67 or 68Stenflex type A EPDM

ORANGE

BLUEEA53 or EA58Stenflex type AS EPDM

REDEA67 or E68Stenflex A Perbunan

WHITEEA67 or EA68Stenflex A Butyl

BLUE

RED

EA53 or EA58Stenflex AS Perbunan

PLANT LINKPL61 or PL62Plantlink

EA65 or 66Stenflex type R ORANGE

ORANGE

STRESS RELIEF

Engineering Appliances Limited,Unit 11 Brooklands Close, Sunbury-on-Thames Middlesex TW16 7DX

Telephone: 01932 788888 Fax: 01932 761263

e-mail - [email protected]://www.engineering-appliances.com

Engineering Appliances set the standard for product support within theindustry.

All products are supported by a regional network of highlyexperienced engineers who discuss the application and thenrecommend the best solution, both technically and commercially. Sitevisits to check that the installation conforms to the relevant standardsare also arranged.

In a commitment to improve understanding of expansioncompensation, the application of rubber bellows and deaeration EAhave a range of CPD seminars which have been registered by CIBSE.

EA/BOA THICK WALL MULTI PLY EXPANSION JOINTS

STENFLEX NYLON & STEEL WIRE RE-INFORCED RUBBER BELLOWS

IND. MATEU FAN COIL & CHILLED CEILING HOSES

SPIROVENT DEAERATORS & DIRT SEPARATORS

SPIROTOP AUTOMATIC AIR VENTS

EA PRESSURISATION STATIONS & EXPANSION VESSELS

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Rubber Bellow