CRN

CRN
Description
Description High-performing, double acting compact piston seal composed of a profiled rubber ring, two polyurethane back-up rings and two POM back-up rings.Good sealing effect.Excellent extrusion & wear resistance.Reliable sealing for significant and sudden pressure variations.Assembly in closed groove, reduced machined costs. * High resistance to gap extrusion.* Particularly strong wear resistance.* Insensitivity to shock loads and pressure peaks. Application AgricultureMobile machineryHydraulic cylinders Materials Polyurethane (PU) + Nitrile Rubber (NBR)

TECHNICAL DATA

Temperature	(PEI+FIBER) -50°C/+170°C (NY+GF) -40°C/+120°C
Pressure	0 MPa
Speed	1.5 m/s
Medias	Mineral hydraulic oils

MATERIALS

Polyurethane is a material that has the elastic properties of rubber. The proportion in its composition (diisocyanate, polyol, chain extender) is determined by its properties. This material is characterised by a strong mechanical resistance, good wear resistance, high elastic modulus, good flexibility and a very good ozone and oxidation resistance.

Chemical resistance	Pure aliphatic hydrocarbons (propane, butane) Mineral oils and greases Silicone oils and greases Water up to +50°C
Compatibility issue	Ketones, esters, ethers, alcohols and glycols Hot water, steam, alkalis, amines and acids
Temperature range	-30°C/+90°C -30°C / +110°C with our PUHT (short term peak at 150°C)

NBR

Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.

Chemical resistance	Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel) Mineral oils and greases Fire-resistant fluids (HFA, HFB and HFC) Diluted acids, low-temperature alkaline and saline solutions Water (up to +100°C max)
Compatibility issue	Fuels with high aromatic content Aromatic hydrocarbons (benzene) Chlorinated hydrocarbons (trichlorethylene) Polar solvents (ketone, acetone, acetic acid, ethylene-ester) Strong acids Glycol-based brake fluids Atmospheric and ozone agents
Temperature range	-25°C/+100°C

CRN

CRN

TECHNICAL DATA

MATERIALS

Product

Industry