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Edwards full parts and spares list
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Edwards 3000 vacuum pump
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Edwards 1900 vacuum pump
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Edwards GV400 vacuum pump
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Edwards Blowers (Rootes pumps)
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Full parts and spares list
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Edwards Blowers (Rootes pumps):
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Edwards e2m2 vacuum pump
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Edwards e1m5 vacuum pump
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Edwards e2m5 vacuum pump
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Edwards e1m8 vacuum pump
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Edwards e2m8 vacuum pump
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Edwards e2m12 vacuum pump
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Edwards e1m18 vacuum pump
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Edwards e2m18 vacuum pump
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Edwards e2m28 vacuum pump
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Edwards e2m30 vacuum pump
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Edwards e1m40 vacuum pump
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Edwards e2m40 vacuum pump
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Edwards e1m80 vacuum pump
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Edwards e2m80 vacuum pump
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Edwards e1m175 vacuum pump
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Edwards e2m175 vacuum pump
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Edwards e1m275 vacuum pump
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Edwards e2m275 vacuum pump
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EH250 blower
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EH500A blower
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EH1200 blower
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EH2600 blower
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EH4200 blower
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Edwards Turbo pumps
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Edwards Speedivalves
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Edwards Vacuum pumps:
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RV3 Vacuum pump
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RV5 Vacuum pump
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RV8 Vacuum pump
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RV12 Vacuum pump
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Edwards Hook and claw pumps
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Edwards scroll pumps
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Edwards GV Series
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Edwards GVM Series
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Edwards EM Series Oil pumps
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Edwards drystar pumps
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Edwards vacuum oils:
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edwards 8A oil
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edwards supergrade A
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edwards 17 oil
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edwards 20 oil
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edwards 16 oil
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edwards 18 oil
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edwards ultragrade 15
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edwards ultragrade 19
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edwards ultragrade 20
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edwards ultragrade 70
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edwards 45 grade oil
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Absolute Vacuum present:
Edwards® Fittings: Technical Data


Edwards® Fittings

General technical data for edwards fittings | Edwards Fittings: Dimensions | Edwards Product Summary (clamps/seals/pipelines/bellows)
Edwards Centering rings/O rings | Edwards elbows/joins/Tpiece/Reducing cross | Edwards Flanges/Weld stubs
  NW/ISO NW/ASA NW/NPT NW/VCR
|
Edwards Adapters | Edwards Couplings/Viewpoints/Pipelines/Clamps | Edwards Flanges/Clamps/
Edwards ISO fittings: Rings/Flanges | Edwards ISO fittings: Adapters | Edwards bellows/pump hookups/flanges
Edwards Bored weld flanges | Edwards Nipples/Tees/Cross | Edwards Reducing Cross/Adapters
Edwards Viewports/Bellows/Flexible Hose | Edwards Gaskets/Washers/Plate Nuts | Edwards ISO Fittings (info)



Edwards® CF flange names

There are a number of ways used to describe the same flange sides. Use the Edwards® table below to cross-reference between common names.

Absolute Vaccuum offers the Edwards® range range of coupling clamps manufactured from high technology polymer - in addition to the traditional aluminum hinged clamp

CX4 crystalline aryl polymer clamps are employed at temperatures up to 120 degrees C and are not affected by most solvents compounds.

The Edwards® range, supplied by Absolute Vacuum are available in swing and quick release hinged versions in these flange sires:

  • NW10/16
  • 20/25
  • 25/32
  • 32/40
  • 50
    BOC Edwards Co-seals and swing clamps are useable in the pressure range 17 bar to 10(-7) mbar.
    The clamps achieve
    electrical continuity via built-in earth strips.

Edwards® Co-seal

The introduction of the Edwards® Co-seal achieved a significant advance in sealing technology of NW and ISO flange connections, eliminating crevices and trapped volumes. The Edwards® NW Co-seals with polymer carriers are an economical seal with widespread appeal.

A C0-seal (with either nitrile or fluoroelastomer seals) carries a split outer ring (the carrier), retaining a moulded elastomer sealing ring. In fitment, the inner face of the Co-seal is exposed to the vacuum system, thereby removing the possibility of crevices or trapped volumes which can in turn result in gas bursts and inhibited pump-down. The Edwards® NW Co-seal is fully restrained externally and this ensures it's suitability from 10(-8) mbar to 17 bar.

With Edwards® ISO bolted flanges, cut-outs placed on the external edge of the Co-seal are placed so that the securing bolts centralise the Co-seal accurately.

With Edwards® ISO collar flanges, claw clamps are used to centralise the seal in addition to the cut-outs in the Co-seal.

Edwards® Centering rings in polymer

Edwards® produce a range of centering rings manufactured from a high-tech polymer. The centering rings carry a  slotted design preventing gas bursts The CM polymer is useable at temperatures up to 120 OC and is not generally affected by solvents. The outgassing rate is 6.6 x 10(-8) mbar | s (-1) cm (-2)..

Edwards® Technical Specs

Operating pressure range (absolute)

C clamp and centering ring:
10-7 mbar – 1 bar/ 14.35 psi

Stainless steel clamping ring and Co-seal:
10-7 mbar – 17 bar/ 247 psi

Stainless steel clamp and metal seal:
10-8 – 3 mbar / 44 psi

Stainless steel clamp and Co-seal (all sizes):
10-7 mbar – 17 bar / 247 psi

Polymer and aluminum clamps and Co-seal:

NWIO to NW25:
10-7 mbar – 17 bar / 247 psi

NW40 to NW50:
10-7 mbar – 10 bar / 145 psi

NW trapped 'O' ring :
10-7 mbar – 1 bar / 145 psi

'O' ring and centering ring (vacuum use only):
1-7 mbar – 1 bar / 14.5 psi

Bellows:
10-7 mbar – 1 bar / 14.5 psi

Flexible pipelines:*
10-7 mbar – 2 bar / 29 psi

Braided flexible pipelines: *
10-7 mbar – 10 bar / 145 psi

*Depends on size

Operating temperature

Polymer Co-seal:
-10 to 80 degrees C

Aluminum Co-seal and nitrile seal:
-10 to 100 degrees C

Aluminum Co-seal and fluoroelastomer seal:
-10 to 200 degrees C

Polymer centering ring and nitrile 'O' ring:
-10 to 100 degrees C

Polymer centering ring and fluoroelastomer seal:
-10 to 125 degrees C

Nitrile 'O' ring:
-10 to 100 degrees degrees C

Fluoroelastomer 'O' ring:
-10 to 100 degrees C

Polymer clamp Constant vacuum use:
-10 to 100 degrees C

Intermittent vacuum use:
-10 to 125 degrees C

Stainless steel clamping ring:
-10 to 125 degrees C

Aluminum clamping ring:
-10 to 200 degrees C

Stainless steel clamp:
-10 to 200 degrees C

Standards compliance

NW and ISO fittings:

Pneurop 6606 (1981)

ISO1609 (1986)

DIN28440, DIN 28404

ISO3669

CF fittings

Stainless steel equivalents


AISI Number

German steel number

DIN standard

304

1.4301

X5 CrNi 18 10

303

1.4305

X10 CrNi 5 18 9

304L

1.4306

X2 CrNi 5 18 9

301

1.4310

X12 CrNi 17 7

316

1.4401

X5 CrNiMo 18 10

316L

1.4404

X2 CrNiMoTi 17 12 2

316 Ti

1.4571

X6 CrNiMoTi 17 12 2

321

1.4541

X10 CrNiTi 18 9

Chemical resistanceas a general guide


Material

Generally Resistant to

Generally Attacked by

NITRILE

Butadiene

Many hydrocarbons, fats, oils, greases, hydraulic fluids.

Ozone, ketones, esters, aldehydes, chlorinated and nitro hydrocarbons

Acrylonitrile



copolymer



NEOPRENE

Chloroprene polymer

All aliphatic aromatic and halogenated hydrocarbons, acids, animal and vegetable fats

Ketones, low molecular weight esters and nitro containing compounds

FLUORO-ELASTOMER

Fluorocarbon polymer

All aliphatic aromatic and halogenated hydrocarbons, acids, animal and vegetable fats.

Ketones, low molecular weight esters and nitro containing compounds.

ALUMINIUM


Organic acids, fatty acids, freons, nitric acid

Strong acids, alkalis, chlorinated solvents, mercury.

STAINLESS STEEL


Organic acids, alkalis, nitric acid, Sulphuric acid (10%).

Oxidizing chlorines, some organic acids, hydrochloric acid, hydrofluoric acid.

POLYMER


Organic acids, glycols, chlorinated solvents, ketones, mineral and oxidising acids caustic solutions, freons

Sodium hydroxide, sulphuric acid (70%)


Edwards Fittings: Dimensions



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