Hositrad Holland B.V.
Phone: (+31) 33 25 37 210
E-mail Hositrad Holland

Hositrad Deutschland
Phone: (+49) 941 55 82 7
E-mail Hositrad Deutschland


KF Flanges

Hositrad flanges are designed in accordance with International Standards Organization specifications which are compatible with other manufacturers’ KF-ISO flange design.
Standard materials are in stainless steel 304, 316L and Aluminum KF flanges allow easy and quick disassembly for repeatable uses.
Flange connections are available for tube size from KF10 – KF50. KF flanges utilize an aluminum clamp with a single wing nut clamp allowing frequent disassembly without tools.
The degree taper surface of flanges allows uniform pressure for compressing an O-ring held in place by a centering ring.
The vacuum seal can be applied up to 1 x 10-9 mbar, depeding on gasket material,and baked to 200°C.
However, sustained baking above 200°C may result in deterioration of O-rings. Hositrad provides a broad range of KF adaptors for connecting to different types of flanges.

Standard Specification
High Vacuum
Vacuum Range:
1x10- 9 mbar
304 (1.4301), 316L (1.4404) or Aluminium  
Gasket Materials:
Viton, Perbunan, Kalrez, Aluminium
Flange Sizes:
Temperature Range:
<200°C (150°C sustained)
Tube Sizes:
12,7 - 57 mm
KF Flanges

Cleaning and Packaging
Products with weld joins are percent helium leak tested to assure leak free. To ensure the cleanliness of Hositrad products ready for onsite use,
all part are ultrasonically cleaned with de-ionized water. Each bag is affixed with a label identifying the component's part number.

Flange information 
Part Code 
Flange Size 
KF10 NW10KF 30 12
KF16 NW16KF 30 17,2
KF20* NW20KF 40 22,3
KF25 NW25KF 40 26,3
KF32* NW32KF 55 34,3
KF40 NW40KF 55 41,3 
KF50 NW50KF 75 52,3
* = Is not Standard


NM Non Magnetic