Guillemin DN 80 Stainless Steel Coupling G 3” Female Threads Without Lock

This is a DN 80 Guillemin coupling with G 3” female threads. It is made of stainless steel with an NBR seal. The maximum pressure is 16 bar (232 psi). The coupling is suitable for temperatures between -10 to 80 °C (14 to 176 °F). Not equipped with a lock ring. A coupling with Gout a lock ring is often chosen on fixed installations.

The couplings adhere to NFE 29572 and EN 14420-8. Two identical couplings are joined by interlocking the jaws and turning the lock rings. Use a Guillemin wrench for sufficient closure.

Note: At least one of the two couplings needs to have a locking ring and only versions with locking rings have a soft seal. Typically, the fixed coupling (i.e. on a tank) won’t have a locking ring and the other coupling (i.e. on a hose) will have a locking ring and soft seal.

Pros:

• Simple and easy connection
• Large free flow area
• Stainless steel couplings have excellent corrosion resistance
• Suitable for water, fluids, hydrocarbons, chemicals, and dry loose materials

Cons:

• Not suitable for steam and other gases
• It does not have a locking ring and soft seal, so it needs to be coupled to one with that feature

Specifications

Size of threaded connection [inch] : 3 inch
Nominal bore of coupling : DN 80
Material : Stainless steel
Seal material : NBR (nitrile rubber)
With locking device : No
Sealing surface diameter (mm) : 101
Thread connection : Inner thread cylindrical BSPP-G
Max temperature (°C) : 80
Min temperature (°C) : -10
Max pressure at 20 °C (bar) : 16