Seals

The fittings in System KAN-therm Copper are equipped with EPDM (ethylene propylene diene monomer) rubber O-rings as standard, while System KAN-therm Copper Gas is equipped with NBR (nitrile butadiene rubber) O-rings used in natural gas and LPG installations. In addition, FPM (fluoride propylene monomer) O-rings for solar and compressed air systems are also available.

The operating parameters and application range of the seals are given in the table below:

Name of the O ring		Properties and operating parameters	Application for seals
	EPDM (black)	max. operating pressure: 16 bar (10 bar for compressed air) operating temperature: -20°C – +110°C short-term: +135°C	tap water central heating cooling water (closed and open systems) compressed air (oil content up to 25 mg/m³) offshore installations
	FPM (green)	max. operating pressure: 10 bar operating temperature of -20°C – +200°C short-term: 230°C	Solar installations* Compressed air Inert gas installations Diesel oil transport installations Attention! Do not use in hot clean water installations

*should be used within the range of parameters according to EN 1254-2. Operating temperature:
≤ +120°C, max. operating pressure: 16 bar for Ø ≤ 54 mm, and 10 bar for Ø > 54 mm

All System KAN-therm Copper fittings with diameters of 12–108 mm are equipped with LBP (Leak Before Press — signalling of unpressed - leaking connections) function.

In the range of 12–108 mm diameters, the function is executed through an appropriate design of a fitting (stub ovalization).