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back to PELCO® NW/KF Style Vacuum Connection Parts

NW/KF Caps, Clamps, Centering Rings, O-Rings
and Plastic Protective Caps

NW/KF flanges

blank vacuum cap
blank caps for NW/KF flanges

Blank Caps

Used to blank off vacuum ports not being used. Can also be used for troubleshooting by blanking off sections to determine possible leaks.

Prod #DescriptionUnitPriceOrder / Quote
NOTE: Dimension A=5mm; B=2.5mm on all Blank Caps
NW/KF Blank Caps in 304 Stainless Steel
92200-10
NW/KF 10 Blank Cap, 304 Stainless Steel, OD=30mm
each
$6.80
Qty:
92200-16
NW/KF 16 Blank Cap, 304 Stainless Steel, OD=30mm
each
7.80
Qty:
92200-25
NW/KF 25 Blank Cap, 304 Stainless Steel, OD=40mm
each
7.00
Qty:
92200-40
NW/KF 40 Blank Cap, 304 Stainless Steel, OD=55mm
each
10.90
Qty:
92200-50
NW/KF 50 Blank Cap, 304 Stainless Steel, OD=75mm
each
11.25
Qty:
NW/KF Blank Caps in Aluminum
92202-10
NW/KF 10 Blank Cap, Aluminum, OD=30mm
each
4.50
Qty:
92202-16
NW/KF 16 Blank Cap, Aluminum, OD=30mm
each
5.50
Qty:
92202-25
NW/KF 25 Blank Cap, Aluminum, OD=40mm
each
6.50
Qty:
92202-40
NW/KF 40 Blank Cap, Aluminum, OD=55mm
each
11.00
Qty:
92202-50
NW/KF 50 Blank Cap, Aluminum, OD=75mm
each
11.50
Qty:





plastic protective caps

Plastic Protection Caps

Use these plastic protection caps to protect the NW/KF flanges from scratches and dust.

Prod #DescriptionUnitPriceOrder / Quote
92250-16
NW/KF 16 Plastic Protection Caps
pkg/10
$8.80
Qty:
92250-25
NW/KF 25 Plastic Protection Caps
pkg/10
8.80
Qty:
92250-40
NW/KF 40 Plastic Protection Caps
pkg/10
8.80
Qty:
92250-50
NW/KF 50 Plastic Protection Caps
pkg/10
8.80
Qty:





cast aluminum NW/KF wing nut clamps cast aluminum NW/KF wing nut clamps

NW/KF Wing Nut Clamps, Cast Aluminum

Cost efficient aluminum die cast clamp to connect standard NW/KF components. NW/KF 16 clamps can be used on NW/KF 10 flanges. This is the most popular wing nut clamp.
Thread size: 10-32.

Prod #DescriptionUnitPriceOrder / Quote
NOTE: Thickness=16.5mm on all Cast Aluminum Wing Nut Clamps
92210-16
NW/KF 16 Wing Nut Clamp, Cast Aluminum, A=62mm, B=42.5mm
each
$6.50
Qty:
92210-25
NW/KF 25 Wing Nut Clamp, Cast Aluminum, A=72.6mm, B=55mm
each
7.50
Qty:
92210-40
NW/KF 40 Wing Nut Clamp, Cast Aluminum, A=89.5mm, B=69.5mm
each
8.00
Qty:
92210-50
NW/KF 50 Wing Nut Clamp, Cast Aluminum, A=122mm, B=94mm
each
8.50
Qty:





forged 304 stainless steel NW/KF wing nut clamps machined aluminum NW/KF wing nut clamps

NW/KF Wing Bolt Clamps, Precision CNC Machined Aluminum

These clamps are precision machined from a solid bar of aluminum with stainless pins and stud. More compact and stronger than cast aluminum. NW/KF 16 clamps can be used on NW/KF 10 flanges.
Thread size: 1/4 x 20

Prod #DescriptionUnitPriceOrder / Quote
NOTE: Thickness, B=16mm on all Machined Aluminum Wing Nut Clamps
92211-16
NW/KF 16 Wing Nut Clamp, Machined Aluminum, A=49.5mm
each
$18.50
Qty:
92211-25
NW/KF 25 Wing Nut Clamp, Machined Aluminum, A=62.5mm
each
20.00
Qty:
92211-40
NW/KF 40 Wing Nut Clamp, Machined Aluminum, A=75mm
each
18.50
Qty:
92211-50
NW/KF 50 Wing Nut Clamp, Machined Aluminum, A=100mm
each
23.50
Qty:





forged 304 stainless steel NW/KF wing nut clamps forged 304 stainless steel NW/KF wing nut clamps

NW/KF Wing Nut Clamps, Forged 304 Stainless Steel

Forged 304 stainless steel clamps are suitable for cleanroom environments. NW/KF 16 clamps can be used on NW/KF 10 flanges.
Thread size: 5/16 x 18

Prod #DescriptionUnitPriceOrder / Quote
92209-16
NW/KF 16 Wing Nut Clamp, Forged 304 Stainless Steel, A=58mm, B=34mm
each
$27.50
Qty:
92209-25
NW/KF 25 Wing Nut Clamp, Forged 304 Stainless Steel, A=79mm, B=53.5mm
each
36.80
Qty:
92209-40
NW/KF 40 Wing Nut Clamp, Forged 304 Stainless Steel, A=93mm, B=66mm
each
41.80
Qty:
92209-50
NW/KF 50 Wing Nut Clamp, Forged 304 Stainless Steel, A=110mm, B=80mm
each
50.00
Qty:





NW/KF stainless steel centering ring with viton o-ring NW/KF stainless steel centering ring with viton o-ring

NW/KF Centering Rings, 304 Stainless Steel with Viton® O-Ring

Used to center and seal NW/KF flanges with O-ring. Viton service temperature is 200°C Max.

Prod #DescriptionUnitPriceOrder / Quote
Note: Diameter, B=5.3mm on all O-Rings
92220-10
NW/KF 10 Centering Ring, 304 SS with Viton O-Ring, A=10mm
each
$5.00
Qty:
92220-16
NW/KF 16 Centering Ring, 304 SS with Viton O-Ring, A=16mm
each
5.20
Qty:
92220-25
NW/KF 25 Centering Ring, 304 SS with Viton O-Ring, A=25mm
each
6.80
Qty:
92220-40
NW/KF 40 Centering Ring, 304 SS with Viton O-Ring, A=40mm
each
6.80
Qty:
92220-50
NW/KF 50 Centering Ring, 304 SS with Viton O-Ring, A=50mm
each
10.00
Qty:





NW/KF centering ring, 304 stainless steel with 60 mesh ss screen and viton o-ring NW/KF centering ring, 304 stainless steel with 60 mesh ss screen and viton o-ring

NW/KF Centering Rings, 304 Stainless Steel with 60 Mesh SS Screen and Viton O-Ring

Used on pumps and other applications where components need to be shielded from small particles entering.

Prod #DescriptionUnitPriceOrder / Quote
Note: Diameter, B=5.3mm on all O-Rings
92222-16M
NW/KF 16 Centering Ring with Viton O-Ring and 60 mesh SS Screen, 304 SS, A=16mm
each
$28.50
Qty:
92222-25M
NW/KF 25 Centering Ring with Viton O-Ring and 60 mesh SS Screen, 304 SS, A=25mm
each
31.80
Qty:
92222-40M
NW/KF 40 Centering Ring with Viton O-Ring and 60 mesh SS Screen, 304 SS, A=40mm
each
38.50
Qty:
92222-50M
NW/KF 50 Centering Ring with Viton O-Ring and 60 mesh SS Screen, 304 SS, A=50mm
each
41.80
Qty:





NW/KF adaptive centering ring, 304 stainless steel with viton o-ring NW/KF adaptive centering ring, 304 stainless steel with viton o-ring

NW/KF Adaptive Centering Rings, 304 Stainless Steel with Viton O-Ring

These adapter rings are used when less common (older) NW/KF 10, NW/KF 20 and NW/KF 32 flanges need to be connected to the standard NW/KF parts.

Prod #DescriptionUnitPriceOrder / Quote
Note: Diameter=5.3mm on all O-Rings
92225-1016
NW/KF 10-16 Adaptive Centering Ring with Viton O-ring, 304 SS
A=17mm, B=12mm, C=10
each
$6.00
Qty:
92225-2025
NW/KF 20-25 Adaptive Centering Ring with Viton O-ring, 304 SS
A=26mm, B=22mm, C=20
each
9.30
Qty:
92225-3240
NW/KF 32-40 Adaptive Centering Ring with Viton O-ring, 304 SS
A=41mm, B=34mm, C=32
each
13.50
Qty:





Centering Ring

NW/KF Centering Rings, 304 Stainless Steel without O-ring

Made for standard 5.3mm diameter O-rings.
Centering Ring

Prod #DescriptionUnitPriceOrder / Quote
92223-16
NW/KF 16 Centering Ring, 304 SS without O-ring, A=16mm
each
$5.00
Qty:
92223-25
NW/KF 25 Centering Ring, 304 SS without O-ring, A=25mm
each
5.50
Qty:
92223-40
NW/KF 40 Centering Ring, 304 SS without O-ring, A=40mm
each
7.25
Qty:
92223-50
NW/KF 50 Centering Ring, 304 SS without O-ring, A=50mm
each
8.50
Qty:





O-Rings for NW/KF Centering Rings
Viton® O-rings
Viton® O-rings
Silicone O-rings
Silicone O-rings
Buna-N O-rings
Buna-N O-rings

O-Rings for NW/KF Centering Rings in Viton®, Silicone and Buna-N

Depending on pressure on the O-ring, environment and service temperature, O-rings need to be renewed to ensure leak-free seals. Use the O-rings to service the NW/KF connections on your vacuum systems. O-rings are sold in packages of 10.

Viton® is used for high vacuum applications, max. temperature is 250°C
Silicone is used for chemical applications, max. temperature is 220°C
Buna-N is used for non-critical and low vacuum applications, max. temperature is 130°C

Prod #DescriptionUnitPriceOrder / Quote
Note: Cross Section Diameter, A=5.3mm on all O-rings
Viton®
92227-16V
Viton® O-Ring for NW/KF 16, B=18.54
pkg/10
$11.50
Qty:
92227-25V
Viton® O-Ring for NW/KF 25, B=27.94
pkg/10
12.50
Qty:
92227-40V
Viton® O-Ring for NW/KF 40, B=42.64
pkg/10
14.20
Qty:
92227-50V
Viton® O-Ring for NW/KF 50, B=53.34
pkg/10
17.50
Qty:
Silicone
92228-16S
Silicone O-Ring for NW/KF 16, B=18.54
pkg/10
3.50
Qty:
92228-25S
Silicone O-Ring for NW/KF 25, B=27.94
pkg/10
4.50
Qty:
92228-40S
Silicone O-Ring for NW/KF 40, B=42.64
pkg/10
6.50
Qty:
92228-50S
Silicone O-Ring for NW/KF 50, B=53.34
pkg/10
7.50
Qty:
Buna-N
92229-16B
Buna-N O-Ring for NW/KF 16, B=18.54
pkg/10
2.50
Qty:
92229-25B
Buna-N O-Ring for NW/KF 25, B=27.94
pkg/10
3.00
Qty:
92229-40B
Buna-N O-Ring for NW/KF 40, B=42.64
pkg/10
4.00
Qty:
92229-50B
Buna-N O-Ring for NW/KF 50, B=53.34
pkg/10
5.00
Qty:





O-ring Materials Comparison Table
Property Buna-N Viton® Silicone
Common Name Nitrile Fluor Elastomere Silicone Rubber
Tear Resistance Good Good Good
Abrasive Resistance Good Good Poor
Ozone Resistance Poor Excellent Excellent
Weather Resistance Fair Excellent Excellent
Heat Resistance Fair Excellent Excellent
Chemical Resistance Fair Excellent Good
Oil Resistance Poor Excellent Poor
Acid Resistance Fair Excellent Good
Alkali Resistance Good Good Fair
Steam Resistance Fair Fair Poor
Minimum Usable Temperature -65°F / -54°C -65°F / -54°C -120°F / -85°C
Maximum Usable Temperature 300°F / 150°C 500°F / 260°C 450°F / 232°C
Color Black Black / Brown Red
Impermeability Fair Good Poor
Tensile Strength Good Good Poor
Cost Low High Medium

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Page Last Updated: September 29, 2011