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ASDevices > Technologies > LipLOK fitting
TECHNOLOGY

LipLOK fitting

Bringing analytical performance to the industrial/instrumentation compression fitting

A significant improvement over the universal industrial double-ferrule fitting design, our patented LipLOK fitting brings together the analytical performance and robustness of the legacy industrial design with improved leak detection. The LipLok uses two sealing points – the first, a sealing lip, is compression-fit to the tube end, allowing for minimal loss of analytical performance. This fitting is similar to the VCR fitting but has less dead volume in its flow path. The analytical-grade seal performance is achieved between the tube end and the lip feature using a very low, almost finger-tight torque. The double ferrule design provides the second level of sealing, which resists the effects of vibration and protects against ejection of the tube from the fitting. This is achieved without transferring excessive force to the lip.

Another improvement with this design is that a surface seal has been added to the fitting nut and there is now a seal or septum in the sniffing hole, so any leak that develops inside the fitting will be forced to accumulate in the leak chamber space. The pressure builds up in the chamber until it reaches a certain value, at which point it goes through or around the septum. Inserting the needle of a sniffer or leak detection apparatus allows sensitive leak detection since the leak is concentrated in this chamber.

Features

  • Backward compatible industrial/instrumentation fitting with the finesse of an analytical one
  • Sealing ring design offers better sealing integrity
  • No need for welding as with face seal fitting
  • Sniffing port through the nut has a septum for leak detection
  • Leak concentration chamber for better leak detection
  • Direct flowthrough and no dead volume effect

Technology principles

No unswept volume and optimized for leak integrity

1

Standard front ferrules

Second level of sealing and tubing swaging action that prevent tube expulsion under high pressure/vibration environment

2

Tubing surface seal and nut sealing ring

Provide concentration chamber sealing

3

Septum

Leak detection sniffing with syringe

4

Coated sealing ring

First level of sealing

5

Leak concentration chamber

Sniffing : Detect the smallest leaks by accumulating and concentrating them

Tracer : Pressurize the chamber with a tracer gas for leak integrity test

 

Leak detection system’s syringe or sniffing probe

 

Products using this technology

Tubes and fittings

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