This website gives no warranty and accepts no responsibility or liability for the accuracy or the completeness of the information and materials contained in this website. Long-term high-pressure action will permanently deform the flat washer.Note: All the information provided on this website is provided on an “as is” and “as commonly used in production” basis and you agree that you use such information entirely at your own risk. We are in market since 1975 as a trusted company manufacturing high quality DIN 7989 3 Washers for steel construction and other metal fasteners based in. The working pressure of the hydraulic system of construction machinery is also gradually increasing, and the equipment has a long operating cycle. The influence of pressure on permanent deformation The pressure of hydraulic system is an important factor that causes permanent deformation of flat washers. DIN 7989 German Standard defines the characteristics like thickness, outer diameter (OD), inner diameter (ID), internal hole, standard, size, materials. For flat washers that work at sub-zero temperatures, the elasticity of rubber materials that are not resistant to low temperatures will decrease sharply at -50☌ to -60☌, and the stamping parts will lose their elasticity.Ģ. Low temperature will reduce the elasticity of the rubber material, or even disappear. single coiled spring lock washer manufacturer in China. When the permanent deformation is greater than 40%, the flat gasket loses its sealing ability and leaks. Spring Washer in DIN 7980 standard, stainless steel or steel material size from M3 through M30. non alloy steel un-finished flat washer din 7989 200hv size(mm): 12/14: china: nhava sheva sea: kgs: 246: 26,496: 108: dec 10 2014: 73182200: m flat washer. Contact a supplier or the parent company directly to get a quote or to. The higher the operating temperature, the greater the compression variable of the flat washer. Finish: Zinc Plain, H.D.G Phosphating, Black Heat Treatment, Galvanized. Find out all of the information about the Lederer product: locking washer DIN 7989. Commonly referred to as Washers For Steel Constructions, or informally known as Thick Flat Washers, this type of component is used for spacing where large bearing surfaces are a requirement. High temperature will accelerate the aging of rubber. A punched Plain Washer produced to grade C of the DIN 7989-1 manufacturing standard, this type of component is designed specifically for use within structural steelwork. The influence of temperature on permanent deformation. As a result, the sealing effect is reduced, and finally leakage occurs.ġ. Permanent deformation Since the synthetic rubber material used in the flat gasket is an elastic material, the initial design of the pressing amount and rebound blocking ability of the stamping parts after long-term use, what are the uses of the flat gasket in the installation and use, the elasticity is reduced, and permanent deformation occurs. DIN 7989 - Washers For Steel Constructions Specifications Brass Copper Stainless Steel. Under high temperature and high pressure working conditions, the main reason for the failure of flat gaskets is permanent deformation, squeezing into the sealing gap and distortion during movement. In the use of construction machinery, flat gaskets are widely used in hydraulic systems.
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