These KF Centering Ring overpressure vacuum fittings follow KF standards and have flange sizes from KF16 to KF50. They are commonly used to build foreline vacuum plumbing and process systems. They are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges. The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50. They are made of corrosive-resistant stainless steel with Viton® O-Ring. Viton® is well known for its excellent resistance to heat (400°F/200°C) and to aggressive fuels and chemicals. \n

Part No.	Size	A	B	C	C/R	O/R	O-Ring
EV01039	KF16	16	32.5	8	304 S.S.	Al	Viton
EV01040	KF25	25	42.5	8	304 S.S.	Al	Viton
EV01041	KF40	40	57.5	8	304 S.S.	Al	Viton
EV01042	KF50	50	77.5	8	304 S.S.	Al	Viton