CMF#NJ – Spring Return Cylinders With Hollow Piston For Barriers Type New Jersey And Guard-rails



The Europress system model CMF22N8S##NJ is used to verify and test the studs in New Jersey barriers and guard rails. The barriers both New Jersey, steel or concrete, and the guard rails are fixed to the road thanks to studs which generally have M16, M20 or M24 dimensions. Both during the installation and the exercise of the studs it’s necessary to verify them through traction tests in order to prove their adherence to concrete and the integrity of the material. To this purpose the Europress system allows to fulfill simple and efficient tensile strength tests. The system is composed of a traction load cell CMF22N8G constituted by a simple effect spring return hollow ram cylinder, with a nominal capacity of a maximum of 212 kN at 700 bars, 8 mm of stroke, firmly connected to a gauge and provided with a quick female coupler combined with a pump which generates hydraulic pressure. This traction cell constitutes an instrument to measure the force applied on the stud while testing. If calibrated as a measurement instrument it can be used also to redact calibration certificated tests. Depending on the different applications required the set can be equipped with ancillaries which are useful to the traction of studs of M16, M20, M24 diameter. Moreover it can be used a longer M20 diameter version for the traction of studs fixed on steel New Jersey barriers. The cylinder is activated by a PNP130 (or PN131) hand pump and a flexible hose SN20M with a male coupler on top.The pump is connected thanks to the male coupler fixed on one side of the hose which is connected to the female coupler fixed on the cylinder. The hollow ram cylinder, thanks to its through hole, allows the passage of the tie-rod of appropriate dimension in order to screw it on the stud itself. Extending the piston of the cylinder, a tensile force, proportional to the pressure generated by the pump, is exerted on the stud. The gauge allows at last to verify and control the force exerted on the stud.


force: 10-20t
stroke: 8-50mm
max working pressure: 700bar