VULKAN Lokring refrigeration and air conditioning
 

The LOKRING® Functional Principle

          

THE TYPICAL LOKRING union joint consists of two LOKRINGs and one tubular joint for the acceptance of the two tube ends. Thanks to the conical inner contour of the LOKRING and the special outer contour of the joint, the diameter of the connection is reduced during assembly to such an extent that the joint and the tube create a hermetically sealed metal-to-metal connection.

           

The lifetime gas-tightness of the fitted connection is ensured by the state of permanent elastic pre-tension, which is produced by the radial forces of the LOKRINGs acting in the opposite direction to the tube-joint connection.

   LOKRING® BRASS CONNECTORS

Verbindung_Messing  
TECHNICAL SPECIFICATIONS
Reference standards:
EN 378-2 and EN 16084
 
Max. operating pressure:
75 bar (1088 psi)
 
Admissible refrigerants:
Suitable for all HFCs and mixtures, all HCs, R32 and
CO2*. Not suitable for NH3.
 
Temperature range:
-50°C up to 150°C (-58°F up to 302°F)
 
Tube diameter range:
6 to 35 mm (1/4” to 1 3/8”)
              
Minimum tube wall thickness:
0.7 mm
 
Approvals:
TÜV (Registered No. 44 780 08 344780)
UL (File SA12004)
 
 
Components
 Joint_MessingLOKRING%20tube%20connectionsStabilisation_insert_brass
 
1.) JOINT
2.) LOKRING
3.) STABILISATION INSERT
 
 
Material Combinations**
 Materialkombi_Rohre_Messing
Materialkombi_Messing 
 
 * Up to the max. operating pressure specified for
each connector.
** Other material combinations on request.
 

 


 

LOKRING® ALUMINIUM CONNECTORS

Verbindung_Alu  
TECHNICAL SPECIFICATIONS
Reference standards:
EN 378-2 and EN 16084
 
Max. operating pressure:
50 bar (725 psi)
 
Admissible refrigerants:
Suitable for all HCs, HFCs and mixtures.
Not suitable for NH3.
 
Temperature range:
-50°C up to 150°C (-58°F up to 302°F)
 
Tube diameter range:
6.35 to 22.23 mm (1/4” to 7/8”)
 
Minimum tube wall thickness:
0.8 mm
 
Approvals:
TÜV (Registered No. 44 780 08 344780)
UL (File SA12004)
 
 
Components
Joint_aluminium LOKRING%20tube%20connections Stabilisation_insert_aluminium
 
1.) JOINT
2.) LOKRING
3.) STABILISATION INSERT
 
 
Material Combinations***
Materialkombi_Messing_Rohre
 
lokring-aluminium-connections
 
*** When connecting aluminium tubes to copper tubes, use a heat shrink sleeve to protect the connection against corrosion.