Non-return flap130M metal-to-metal seal with 2 1/2" internal thread
 Suitable for water supply, heating, air conditioning and compressed air systems.  
 Valve body and flap made of brass
 NBR O-rings
 Metallic sealing  
 - Minimum operating temperature: 0°C 
 - Maximum operating temperature: 90°C 
 - Max. permissible operating pressure: 8 bar / 116 psi
  
  Connection type: 2 x internal thread
 Threaded connections ISO228 (corresponds to DIN EN ISO 228 and BS EN ISO 228)   
The non-return flap should only be installed in the horizontal or vertical position.