• Guillemin Couplings, Symmetrical Fittings

  • We provide quick-disconnect Guillemin couplings for industrial and firefighting fields. They are produced in basically aluminum alloy, stainless steel, brass and bronze alloy materials.
  • Guillemin couplings are available as half couplings by hose shank, screw-on adpaters, welded-on couplings and blind caps and plugs in the range of DN15 ~ DN150.
  • The series are made according to basically French NF standards or tailered dimensions per specific demands for equipments.
  • Guillemin Quality Controls

  • 'Demi-raccord symétrique (Système Guillemin)' is a French-normed (NF E29-572) coupling for quick disconnection in the transfer of fluids at a pressuring rate PN 6~16. They are symmetrical fittings with claw joints.
  • Claw dimensions are checked in-process
  • Two Guillemin half couplings are closed with soft sealing by making the locking ring a quarter turn that sends the chamfered lugs into the claws.
  • Therefore the claws must stay perfectly intact whenever the case, especially like one hitting the floor; or commonly upon the lateral tensile force that keeps rising from the connecting hose. On-spot inspection with a roundness caliber is made randomly on the correctness of Guillemin claw dimensions.
  • Claws must be proven to be strong enough per Standard requirement
  • Two major type tests are carried out in purpose of proving the claws are strong enough against impacts from all directions in practice.
  • On-spot inspection with a roundness caliber is made randomly on the correctness of Guillemin claw dimensions.On-spot inspection with a roundness caliber is made randomly on the correctness of Guillemin claw dimensions.
  • In flaring test, we use a 45° steel cone probe of hardness greater than 250HB lying between the claws. We test the claws by progressing the probe further and further to expand them till the breakage at either side.
  • And in cap test, a cone plate of a 135° touching angle is lifted high through a guidance pole. It is then dropped to cap the claws at the force of gravity. The process will be repeated over 'a hundred of' times before before the claws' inner side turns over. Cleavage at bottom of the claws would be visualized.