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Centering Rings for ISO KF/LF Flanges

NW16 KF Centering Ring

NW16 KF Centering Ring

Part Number: 202200

NW16 KF stainless steel centering ring assembly with Viton® O'ring.

$14.00
NW25 KF Centering Ring

NW25 KF Centering Ring

Part Number: 202210

NW25 KF stainless steel centering ring assembly with Viton® O'ring.

$16.00
NW40 KF Centering Ring

NW40 KF Centering Ring

Part Number: 202220

NW40 KF stainless steel centering ring assembly with Viton® O'ring.

$20.00
NW50 KF Centering Ring

NW50 KF Centering Ring

Part Number: 202230

NW50 KF stainless steel centering ring assembly with Viton® O'ring.

$25.00
NW63 LF Centering Ring

NW63 LF Centering Ring

Part Number: 202240

NW63 LF stainless steel centering ring assembly with Viton® O'ring.

$87.00
NW80 LF Centering Ring

NW80 LF Centering Ring

Part Number: 202251

NW80 LF stainless steel centering ring assembly with Viton® O'ring.

$103.00
NW100 LF Centering Ring

NW100 LF Centering Ring

Part Number: 202262

NW100 LF stainless steel centering ring assembly with Viton® O'ring.

$111.00
NW160 LF Centering Ring

NW160 LF Centering Ring

Part Number: 202273

NW160 LF stainless steel centering ring assembly with Viton® O'ring.

$134.00
NW200 LF Centering Ring

NW200 LF Centering Ring

Part Number: 202284

NW200 LF stainless steel centering ring assembly with Viton® O'ring.

$183.00
Centering Rings - High Vacuum (HV), drawing

Centering Rings

High-Vacuum (HV) Centering Rings

Stainless steel centering ring assemblies with Viton® O-rings.
These ISO centering rings are used for mating two High Vacuum (HV) NW ISO (KF,LF) flanges.
 
Centering Rings Assembly:
Centering rings are placed between two ISO flanges with matching outer diameters. The tallest part of the stainless steel centering rings rests inside a centering ring locater groove or counterbore.  The Viton O-ring rests on the flat polished surface outside the locater groove or counterbore and the vacuum seal is made by compressing the O'ring between the mating flanges.  Typically this is done by alternately wrench-tightening opposing pairs of bolts or tightening the hinged clamp until the first metal-to-metal contact is made between the inner surfaces of the flanges and the spacing edges of the centering ring.
 
Centering Rings Options:

(on request)

Aluminum or Brass rings on request.
Flourocarbon and Buna-N O-rings on request.