KF40 Flange for Infrared Temperature Measurement in Vacuum

The KF40 Flange is essential for integrating infrared temperature sensors into vacuum systems down to 10^-7 mbar. Also known as NW, QF, or DN flanges, these ISO-standardized fittings create a vacuum seal with a rubber O-ring. Valued for ease of use, maintenance, and reusability, KF flanges are ideal for quick assembly. The KF40 ensures system integrity by isolating the sensor, ensuring precise measurements.

General Specifications

• Storage temperature: 0 °C to 70 °C
• Material: stainless steel

Materials / Combinations

Available in the following material versions:
• Germanium – for LT, G7, P7
• Silicon – for 4M
• Borofloat – for 05M, 08M, 1M

Transmission

• Germanium: 0.92 (LT)
• Silicon: ~ 0.90 (4M)
• Borofloat – 0.92 (1M/ 2M/ 3M)

The shown values are standard and may vary between different delivery batches.

Operating Temperature

• Germanium: <100 °C
• Silicon: <200 °C
• Borofloat: < 200 °C

What are the best practices for maintaining and ensuring the optimal performance of O-rings in a KF system?

To achieve optimal performance in a KF system, apply a very thin layer of vacuum grease to any O-ring. This should be done manually while wearing gloves, ensuring just enough grease is used to create a shine on the O-ring. Before installation, visually inspect the O-ring and its mating surfaces to ensure they are debris-free, which could prevent proper contact and cause leaks. Regularly inspect O-rings for signs of dry rot, cracking, tearing, or debris accumulation from normal operation. Replace any O-ring that is suspected of causing a leak.

Are there any certificates or approvals for the KF40 Flange?

Optris can provide test reports from external certifiers.

• 1x KF40 flange with infrared window