NW Centering Rings; Centering Rings with Screen, Adaptive Centering Rings

Seal Centering Ring Assembly

Stainless steel centering ring
Replaceable Buna-N O-ring
100° C maximum bake out

Seal Centering Ring Assembly

PART NUMBER	TUBE OD	ISO	A	B
KSCR-1710	1/2”	NW 10	0.394	0.210
KSCR-1716	3/4”	NW 16	0.630	0.210
KSCR-1725	1”	NW 25	0.934	0.210
KSCR-1740	1-1/2”	NW 40	1.575	0.210
KSCR-1750	2”	NW 50	1.969	0.210

Seal Centering Ring Assembly

Stainless steel centering ring
Replaceable Viton® O-ring
200° C maximum bake out

Seal Centering Ring Assembly

PART NUMBER	TUBE OD	ISO	A	B
KSCR-1810	1/2”	NW 10	0.394	0.210
KSCR-1816	3/4”	NW 16	0.630	0.210
KSCR-1825	1”	NW 25	0.984	0.210
KSCR-1840	1-1/2”	NW 40	1.575	0.210
KSCR-1850	2”	NW 50	1.969	0.210

KEY SPEEDY ISO-NW Centering Rings

Seal Centering Ring “Trapped” Overpressure Assembly
304 stainless steel centering ring
Aluminum outer ring
Replacement Viton® O-ring

KEY SPEEDY ISO-NW Centering Rings

PART NUMBER	TUBE OD	ISO	A	B	C
KSCR-1816-T-304	¾”	NW 16	0.63	1.28	.31
KSCR-1825-T-304	1”	NW 25	0.98	1.67	.31
KSCR-1840-T-304	1-1/2”	NW 40	1.57	2.26	.31
KSCR-1850-T-304	2”	NW 50	1.97	3.051	.31

Seal Centering Ring Assembly with Screen

Stainless steel centering
Replaceable Viton® O-ring
# 72 Stainless steel screen

Seal Centering Ring Assembly with Screen

PART NUMBER	TUBE OD	ISO	A	B
KSCR-1816-72	3/4”	NW 16	0.490	0.21
KSCR-1825-72	1”	NW 25	0.840	0.21
KSCR-1840-72	1-1/2”	NW 40	1.470	0.21
KSCR-1850-72	2”	NW 50	1.830	0.21

Seal Centering Ring Assembly

Stainless steel centering
Replaceable Silicone O-ring

Seal Centering Ring Assembly

PART NUMBER	TUBE OD	ISO	A	B
KSCR-1910	1/2”	NW 10	0.394	0.21
KSCR-1916	3/4”	NW 16	0.630	0.21
KSCR-1925	1”	NW 25	0.984	0.21
KSCR-1940	1-1/2”	NW 40	1.575	0.21
KSCR-1950	2”	NW 50	1.969	0.21

Seal Adaptive Centering Ring Assembly

Aluminum centering ring
Replaceable Buna-N O-ring
Connects outdated bore sizes

Seal Adaptive Centering Ring Assembly

PART NUMBER	TUBE OD	ISO	A	B	C
KSCR-2016A	1/ 2”	NW 10 to NW 16	0.67	0.47	0.39
KSCR-2025A	1”	NW 20 to NW 25	1.02	0.87	0.83
KSCR-2040A	1-1/2”	NW 32 to NW 40	1.61	1.34	1.26

Product information is subject to change without notice. Product images may include options or accessories not included with the base model.

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For 50 years, Key High Vacuum Products, Inc. has been a trusted leader in precision-engineered stainless steel high vacuum weldments. With tens of thousands of unique weldments in use—from particle accelerators to industrial leak detectors—our expertise is proven across industries. Rooted in innovation, craftsmanship, and an unwavering commitment to customer satisfaction, we deliver high-quality, customized solutions that drive success. Every day, our team brings a unique blend of passion and precision, ensuring your goals are met with excellence—because your mission matters. Experience the Key High difference.

Key High Vacuum Products, Inc.

36 Southern Boulevard, Nesconset, NY 11767

1-631-360-3970