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What's KF vacuum flange?

Author: FOSHAN BOWAH VACUUM EQUIPMENT CO.,LTD

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KF, also known as QF,  is a kind of quick-release flange used in vacuum systems. It consists of the following components: two symmetrically distributed KF flanges, O-Rings, centering rings, and clamps. No additional tools are required to loosen or compress the coupling by simply turning the disc nut by hand.



KF vacuum flange head is a small size quick flange joint. Nominal diameter sizes include DN 10, 16, 25, 40, and 50.

KF vacuum flange is usually composed of a flange, clamp, O-Ring, and centering ring.

KF(QF) is suitable for low-vacuum, medium-vacuum, and high-vacuum pipelines. Its nominal diameter is 10-50, and it is a clamping vacuum flange with an O-ring seal.


KF Flange Sizes

DN
d1 d2 d3
10 14
12.2
30
16 20 17.2 30
25 28 26.2 40
40 44.5 41.2
55
50 61 52.2
75


KF Centering Ring Dimensions

DN
d1 d2 d3
10 10 12
15.3
16 16 17 18.5
25 25 26 28.5
40 40 41
43
50 50 52
55.5


O-ring

DN D S
10 15
5
16 18 5
25 28 5
40 42
5
50 55 5









What's KF vacuum flange?
KF, also known as QF, is a kind of quick-release flange used in vacuum systems. It consists of the following components: two symmetrically distributed KF flanges, O-Rings, centering rings, and clamps.
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