100764006 datasheet(4/20 Pages) MKS

4 / 20 page

Figure 3 shows the dimensions of ISO Universal flange

components for sizes from 63 to 630 mm, which are

standard in this catalog. The maximum size for an MF

flange is NW 500, while the bolted flange can run up to

NW 1000. The recommended number of clamps to be

used with MF flanges are also listed.

Flanges and seals are designed to be tightened to metal

to metal contact. It is important that the clamps or bolts not

be over tightened or warping of the flanges could result.

The torque rating for clamps and bolts is 7 to 10 pounds

per foot.

There are a variety of choices available when selecting

centering ring assemblies. Two types of elastomers

are available, Buna-N and Viton. Use Viton where

temperatures, chemical resistance or long installed life

make it beneficial. Use Buna-N where temperatures are

moderate, and installed useful life is consistent with this

material. The centering ring is available in two types of

metal: stainless steel and aluminum. Use stainless steel

where chemical resistance is needed.

MKS Instruments presently supplies Series 76 ISO-

Universal flanges drilled for inch dimension tubing and

pipe. Weld assembly should be by an experienced TIG

or MIG welder. Bored flanges have been designed for

assembly by internal fusion welding without the use of filler

metal. Tacking is advisable. A weld rotator aides in making

attractive welds with minimum warping. Excessive current

or non uniform rotation can cause warping of the flange

face. When there is a concern about warping, use a flange

with a stub. Buttwelding to stubs in sizes up to 10 inch

diameter with a wall thickness of 1/8 inch can also be by

fusion. Internal purge gas will prevent excessive oxidation.

Remove any oxidation by wire brushing. This should be

done while the part is still slightly warm, since the oxides

are nearly impossible to remove later. Use only a stainless

steel wire brush or wheel, since ordinary steel brushes

leave iron residue which will then rust.

Since the centering ring grooves on the NW 100 and NW

160 flange happen to be almost exactly the diameters of

the tubing to be used with these sizes, the flange can be

inadvertently welded on backwards. When working with

the MF flange, note that the clamp retaining groove goes

to the rear (tube) side. Working with the bolted flange

requires more care. Close inspection of the weld prep

detail will show the recess from the tube side to have a

negligible radius, while there is a small radius visible on

the seal side.

The technical staff of MKS Instruments is available to help

you with system design and any special needs you may

encounter. Call 800-345-1967 for a quotation.

Figure 3

100764006 Datenblatt(PDF) 4 Page - MKS Instruments.

100764006 Datenblatt(HTML) 4 Page - MKS Instruments.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Datenblatt Download

Link URL