c10514490 - NW25 TRAPPED CENTRING FKM GP

NW25 TRAPPED CENTRING FKM GP

C10514490

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Overview

Nitrile ‘O’ rings

Our nitrile (VOR) ‘O’ rings are manufactured from butadiene/acrylonitrile. Commonly referred to as nitrile rubber.


Fluoroelastomer ‘O’ rings

Our fluoroelastomer (VIT) ‘O’ rings are manufactured from a copolymer of vinylidene fluoride and hexafluoro-propylene. Fluoroelastomer ‘O’ rings should be used in systems operated below 10-6 mbar.

Fluoroelastomer ‘O’ rings take up a set as their operating temperature increases, but this does not affect their sealing properties in vacuum applications.  A fluoroelastomer ‘O’ ring will restore to its normal shape after uncompressed exposure to atmosphere:  accelerate this process by heating to 150 °C in air. The baking temperature of fluoroelastomer need not exceed 150 °C, since a higher temperature will not, after cooling; further reduce the outgassing rate of the fluoroelastomer.

For convenience, we give fluoroelastomer ‘O’ rings the same size reference figure group as corresponding nitrile ‘O’ rings, but although the two materials are moulded to the same nominal sizes, fluoroelastomer ‘O’ rings have wider tolerances than those specified in BS1806.

Applications

Nitrile ‘O’ rings

    Low outgassing rate
    Good deformation resistance (very resistant to set after compression)
    High resistance to most oils.

Fluoroelastomer ‘O’ rings

    Very low outgassing rate (especially after baking)
    Chemical stability at high temperatures up to 200 °C
    High resistance to oils and many chemicals.

c10514490 - NW25 TRAPPED CENTRING FKM GP

NW25 TRAPPED CENTRING FKM GP

C10514490
Downloading pricing...
List Price:
Web Price:
Please contact customer care for pricing

Features and Benefits

  • Fast availability from responsive local supply centres
  • One source shopping
  • Kitting
  • Consignment stocks
  • Total quality

Technical Data


Physical data
Operating pressure range (absolute)
C clamp and centring ring 10-7 mbar - 1 bar (14.5 psi)
Stainless steel clamping ring and Co-seal 10-7 mbar - 17 bar (247 psi)
Stainless steel clamp and metal seal  10-8 mbar - 3 bar (44 psi)
Stainless steel clamp and Co-seal (all sizes) 10-7 mbar - 17 bar (247 psi)
Polymer and aluminium clamps and Co-seal
 NW10 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 - 10 bar (145 psi)
‘O’ ring and centring ring (vacuum use only) 10-7 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 ºC
Aluminium Co-seal and nitrile seal -10 to 100 ºC
Aluminium Co-seal and fluoroelastomer seal -10 to 200 ºC
Polymer centring ring and nitrile ‘O’ ring -10 to 100 ºC
Polymer centring ring and fluoroelastomer seal -10 to 125 ºC
Nitrile ‘O’ ring -10 to 100 ºC
Fluoroelastomer ‘O’ ring -10 to 200 ºC
Polymer clamp
 Constant vacuum use -10 to 100 ºC
 Intermittent vacuum use -10 to 125 ºC
Stainless steel clamping ring -10 to 125 ºC
Aluminium clamping ring -10 to 200 ºC
Stainless steel clamp -10 to 200 ºC


Standards compliance
NW and ISO fittings Pneurop 6606 (1981),

ISO1609 (1986)

DIN28403, DIN28404
CF fittings ISO3669
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 19 10
301 1.4310 X12 CrNi 17 7
316 1.4401 X5 CrNiMo 18 10
316L 1.4404 X2 CrNiMo 17 13 2
316Ti 1.4571 X6 CrNiMoTi 17 12 2
321 1.4541 X10 CrNiTi 18 9


NW Trapped 'O' Ring sizes – (see Dimensions)

A B C D E F Ordering Information
Fluoroelastomer/ Stainless Steel/ Aluminium
NW10/16 32.5 27.5 30.2 7 18.5 16 C10512346
NW25 42.5 37.5 40.2 7 28.5 25 C10512349
NW40 57.5 52.0 55.2 7 43 40 C10512345
NW50 77.5 64.5 75.2 7 55.5 50 C10512350




Dimensions