DN250CF/12 Copper Gasket Pk 5

When you buy flange fittings from Edwards, you can expect the service that only a leading international supplier can offer you.  Whether you are an OEM (needing scheduled deliveries of component kits for series production) or a unique system builder, you can rely on your local supplier to meet all your requirements.

• Fast availability from responsive local supply centres
• Edwards world-wide support
• International ISO, Pneurop and British Standards
• Complete range for all common sizes in aluminium and stainless steel
• Stainless fittings made in 316L for highest corrosion resistance
• Precision material control ensures low outgassing and dependable vacuum performance
• Leak tested to 10^-9 mbar l s^-1
• One source shopping - simplifies administration and purchasing costs, creates more purchasing power

Physical data
Operating pressure range (absolute)
C clamp and centring ring	10-7 mbar - 1 bar
Stainless steel clamping ring and Co-seal	10-7 mbar - 17 bar
Stainless steel clamp and metal seal	10-8 mbar - 3 bar
Stainless steel clamp and Co-seal (all sizes)	10-7 mbar - 17 bar
Polymer and aluminium clamps and Co-seal
NW10 to NW25	10-7 mbar - 17 bar
NW40 to NW50	10-7 mbar - 10 bar
NW trapped ‘O’ ring	10-7 mbar - 10 bar
‘O’ ring and centring ring (vacuum use only)	10-7 mbar - 1 bar
Bellows	10-7 mbar - 1 bar
Flexible pipelines	10-7 mbar - 2 bar
Braided flexible pipelines*	10-7 mbar - 10 bar
*  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

Copper Gaskets – see Dimensional drawing

		A	B	C	D	E	F
Metric	Inch
DN16CF	1⅓	21	16	2	34	1.33	10
DN40CF	2¾	48	37	2	70	2.75	10
DN63CF	4½	82	63	2	114	4.5	10
DN100CF	6	120	101	2	152	6	10
DN160CF	8	171	152	2	203	8	5
DN200CF	10	2