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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 # Description Unit Price Order / Quote
NOTE: Dimension A=5mm (.20"); B=2.5mm (.10") on all Blank Caps
NW/KF Blank Caps in 304 Stainless Steel
92200-10 NW/KF 10 Blank Cap, 304 Stainless Steel, OD=30mm (1.18") each $6.80
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92200-16 NW/KF 16 Blank Cap, 304 Stainless Steel, OD=30mm (1.18") each 7.80
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92200-25 NW/KF 25 Blank Cap, 304 Stainless Steel, OD=40mm (1.57") each 7.00
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92200-40 NW/KF 40 Blank Cap, 304 Stainless Steel, OD=55mm (2.16") each 10.90
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92200-50 NW/KF 50 Blank Cap, 304 Stainless Steel, OD=75mm (2.95") each 11.25
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NW/KF Blank Caps in Aluminum
92202-10 NW/KF 10 Blank Cap, Aluminum, OD=30mm (1.18") each 4.50
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92202-16 NW/KF 16 Blank Cap, Aluminum, OD=30mm (1.18") each 4.00
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92202-25 NW/KF 25 Blank Cap, Aluminum, OD=40mm (1.57") each 4.50
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92202-40 NW/KF 40 Blank Cap, Aluminum, OD=55mm (2.16") each 5.00
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plastic protective caps

Plastic Protection Caps

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

Prod # Description Unit Price Order / Quote
92250-16 NW/KF 16 Plastic Protection Caps pkg/10 $8.80
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92250-25 NW/KF 25 Plastic Protection Caps pkg/10 8.80
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92250-40 NW/KF 40 Plastic Protection Caps pkg/10 8.80
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92250-50 NW/KF 50 Plastic Protection Caps pkg/10 8.80
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cast aluminum NW/KF wing nut clamps 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 # Description Unit Price Order / Quote
NOTE: Thickness=16.5mm (.64") on all Cast Aluminum Wing Nut Clamps
92210-16 NW/KF 16 Wing Nut Clamp, Cast Aluminum, A=62mm (2.44"), B=42.5mm (1.67") each $6.50
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92210-25 NW/KF 25 Wing Nut Clamp, Cast Aluminum, A=72.6mm (2.85"), B=55mm (2.16") each 6.50
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92210-40 NW/KF 40 Wing Nut Clamp, Cast Aluminum, A=89.5mm (3.52"), B=69.5mm (2.73") each 8.00
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92210-50 NW/KF 50 Wing Nut Clamp, Cast Aluminum, A=122mm (4.80"), B=94mm (3.70") each 8.50
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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 # Description Unit Price Order / Quote
NOTE: Thickness, B=16mm (.63") on all Machined Aluminum Wing Nut Clamps
92211-16 NW/KF 16 Wing Nut Clamp, Machined Aluminum, A=49.5mm (1.94") each $18.50
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92211-25 NW/KF 25 Wing Nut Clamp, Machined Aluminum, A=62.5mm (2.46") each 20.00
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92211-40 NW/KF 40 Wing Nut Clamp, Machined Aluminum, A=75mm (2.95") each 18.50
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92211-50 NW/KF 50 Wing Nut Clamp, Machined Aluminum, A=100mm (3.93") each 23.50
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forged 304 stainless steel NW/KF wing nut clamps 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 # Description Unit Price Order / Quote
92209-16 NW/KF 16 Wing Nut Clamp, Forged 304 Stainless Steel, A=58mm (2.28"), B=34mm (1.39") each $27.50
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92209-25 NW/KF 25 Wing Nut Clamp, Forged 304 Stainless Steel, A=79mm (3.11"), B=53.5mm (2.11") each 36.80
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92209-40 NW/KF 40 Wing Nut Clamp, Forged 304 Stainless Steel, A=93mm (3.66"), B=66mm (2.60") each 41.80
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92209-50 NW/KF 50 Wing Nut Clamp, Forged 304 Stainless Steel, A=110mm (4.33"), B=80mm (3.15") each 50.00
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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. May be black or brown - color cannot be specified.

Prod # Description Unit Price Order / Quote
Note: Diameter, B=5.3mm (.21") on all O-Rings
92220-10 NW/KF 10 Centering Ring, 304 SS with Viton® O-Ring, A=10mm (.39") each $5.00
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92220-1610 NW/KF Adaptive Centering Ring from NW/KF 16 to NW/KF 10, 304 SS with Viton® O-Ring, A=16/10mm (.63/.39") each 7.95
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92220-16 NW/KF 16 Centering Ring, 304 SS with Viton® O-Ring, A=16mm (.63") each 5.20
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92220-25 NW/KF 25 Centering Ring, 304 SS with Viton® O-Ring, A=25mm (.98") each 6.80
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92220-40 NW/KF 40 Centering Ring, 304 SS with Viton® O-Ring, A=40mm (1.57") each 6.80
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92220-50 NW/KF 50 Centering Ring, 304 SS with Viton® O-Ring, A=50mm (1.97") each 10.00
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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. May be black or brown - color cannot be specified.

Prod # Description Unit Price Order / Quote
Note: Diameter, B=5.3mm (.21") on all O-Rings
92222-16M NW/KF 16 Centering Ring with Viton® O-Ring and 60 mesh SS Screen, 304 SS, A=16mm (.63") each $28.50
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92222-25M NW/KF 25 Centering Ring with Viton® O-Ring and 60 mesh SS Screen, 304 SS, A=25mm (.98") each 31.80
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92222-40M NW/KF 40 Centering Ring with Viton® O-Ring and 60 mesh SS Screen, 304 SS, A=40mm (1.57") each 38.50
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92222-50M NW/KF 50 Centering Ring with Viton® O-Ring and 60 mesh SS Screen, 304 SS, A=50mm (1.97") each 41.80
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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 ring, 304 stainless steel with 60 mesh ss screen and viton o-ring

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

15 mesh stainless steel filter to protect pump intake.

Prod # Description Unit Price Order / Quote
Note: Diameter, B=5.3mm (.21") on both O-Rings
92224-16 NW/KF 16 Centering Ring with 15 mesh SS Filter, 304 SS, A=16mm (.63"), C=21mm (.83") each $12.50
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92224-25 NW/KF 25 Centering Ring with 15 mesh SS Filter, 304 SS, A=25mm (.98"), C=21mm (.83") each 14.50
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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. May be black or brown - color cannot be specified.

Prod # Description Unit Price Order / Quote
Note: Diameter=5.3mm (.21") on all O-Rings
92225-1016 NW/KF 10-16 Adaptive Centering Ring with Viton® O-ring, 304 SS
A=17mm (.67"), B=12mm (.47"), C=10mm (.39")
each $6.00
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92225-2025 NW/KF 20-25 Adaptive Centering Ring with Viton® O-ring, 304 SS
A=26mm (1.02"), B=22mm (.87"), C=20mm (.79")
each 9.30
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92225-3240 NW/KF 32-40 Adaptive Centering Ring with Viton® O-ring, 304 SS
A=41mm (1.61"), B=34mm (1.34"), C=32mm (1.26")
each 13.50
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Centering Ring Centering Ring

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

Made for standard 5.3mm (.21") diameter O-rings.

Prod # Description Unit Price Order / Quote
92223-16 NW/KF 16 Centering Ring, 304 SS without O-ring, A=16mm (.63") each $5.00
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92223-25 NW/KF 25 Centering Ring, 304 SS without O-ring, A=25mm (.98") each 5.50
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92223-40 NW/KF 40 Centering Ring, 304 SS without O-ring, A=40mm (1.57") each 7.25
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92223-50 NW/KF 50 Centering Ring, 304 SS without O-ring, A=50mm (1.97") each 8.50
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O-Rings for NW/KF Centering Rings

Viton® 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® O-rings may be black or brown - color cannot be specified.

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 # Description Unit Price Order / Quote
Note: Cross Section Diameter, A=5.3mm (.21") on all O-rings
Viton®
92227-16V Viton® O-Ring for NW/KF 16, B=18.54mm (.73") pkg/10 $13.50
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92227-25V Viton® O-Ring for NW/KF 25, B=27.94mm (1.10") pkg/10 15.50
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92227-40V Viton® O-Ring for NW/KF 40, B=42.64mm (1.68") pkg/10 16.70
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92227-50V Viton® O-Ring for NW/KF 50, B=53.34mm (2.10") pkg/10 21.30
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Silicone
92228-16S Silicone O-Ring for NW/KF 16, B=18.54mm (.73") pkg/10 3.50
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92228-25S Silicone O-Ring for NW/KF 25, B=27.94mm (1.10") pkg/10 4.50
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92228-40S Silicone O-Ring for NW/KF 40, B=42.64mm (1.68") pkg/10 6.50
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92228-50S Silicone O-Ring for NW/KF 50, B=53.34mm (2.10") pkg/10 7.50
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Buna-N
92229-16B Buna-N O-Ring for NW/KF 16, B=18.54mm (.73") pkg/10 2.50
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92229-25B Buna-N O-Ring for NW/KF 25, B=27.94mm (1.10") pkg/10 3.00
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92229-40B Buna-N O-Ring for NW/KF 40, B=42.64mm (1.68") pkg/10 4.00
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92229-50B Buna-N O-Ring for NW/KF 50, B=53.34mm (2.10") pkg/10 5.00
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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
Electrical Resistance Fair Fair Excellent
Freeze Resistance Good Poor Excellent
Flame Resistance Poor Excellent Fair
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